HCPCS Level II Modifiers

A1 Dressing for one wound

A2 Dressing for two wounds

A3 Dressing for three wounds

A4 Dressing for four wounds

A5 Dressing for five wounds

A6 Dressing for six wounds

A7 Dressing for seven wounds

A8 Dressing for eight wounds

A9 Dressing for nine or more wounds

AA Anesthesia services performed personally by anesthesiologist

AB Audiology service furnished personally by an audiologist without a physician/npp order for non-acute hearing assessment unrelated to disequilibrium, or hearing aids, or examinations for the purpose of prescribing, fitting, or changing hearing aids; service may be performed once every 12 months, per beneficiary

AD Medical supervision by a physician: more than four concurrent anesthesia procedures

AE Registered dietician

AF Specialty physician

AG Primary physician

AH Clinical psychologist

AI Principal physician of record

AJ Clinical social worker

AK Non participating physician

AM Physician, team member service

AO Alternate payment method declined by provider of service

AP Determination of refractive state was not performed in the course of diagnostic ophthalmological examination

AQ Physician providing a service in an unlisted health professional shortage area (hpsa)

AR Physician provider services in a physician scarcity area

AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery

AT Acute treatment (this modifier should be used when reporting service 98940, 98941, 98942)

AU Item furnished in conjunction with a urological, ostomy, or tracheostomy supply

AV Item furnished in conjunction with a prosthetic device, prosthetic or orthotic

AW Item furnished in conjunction with a surgical dressing

AX Item furnished in conjunction with dialysis services

AY Item or service furnished to an esrd patient that is not for the treatment of esrd

AZ Physician providing a service in a dental health professional shortage area for the purpose of an electronic health record incentive payment

BA Item furnished in conjunction with parenteral enteral nutrition (pen) services

BL Special acquisition of blood and blood products

BO Orally administered nutrition, not by feeding tube

BP The beneficiary has been informed of the purchase and rental options and has elected to purchase the item

BR The beneficiary has been informed of the purchase and rental options and has elected to rent the item

BU The beneficiary has been informed of the purchase and rental options and after 30 days has not informed the supplier of his/her decision

CA Procedure payable only in the inpatient setting when performed emergently on an outpatient who expires prior to admission

CB Service ordered by a renal dialysis facility (rdf) physician as part of the esrd beneficiary's dialysis benefit, is not part of the composite rate, and is separately reimbursable

CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)

CD Amcc test has been ordered by an esrd facility or mcp physician that is part of the composite rate and is not separately billable

CE Amcc test has been ordered by an esrd facility or mcp physician that is a composite rate test but is beyond the normal frequency covered under the rate and is separately reimbursable based on medical necessity

CF Amcc test has been ordered by an esrd facility or mcp physician that is not part of the composite rate and is separately billable

CG Policy criteria applied

CH 0 percent impaired, limited or restricted

CI At least 1 percent but less than 20 percent impaired, limited or restricted

CJ At least 20 percent but less than 40 percent impaired, limited or restricted

CK At least 40 percent but less than 60 percent impaired, limited or restricted

CL At least 60 percent but less than 80 percent impaired, limited or restricted

CM At least 80 percent but less than 100 percent impaired, limited or restricted

CN 100 percent impaired, limited or restricted

CO Outpatient occupational therapy services furnished in whole or in part by an occupational therapy assistant

CP Adjunctive service related to a procedure assigned to a comprehensive ambulatory payment classification (c-apc) procedure, but reported on a different claim

CQ Outpatient physical therapy services furnished in whole or in part by a physical therapist assistant

CR Catastrophe/disaster related

CS Cost-sharing waived for specified covid-19 testing-related services that result in and order for or administration of a covid-19 test and/or used for cost-sharing waived preventive services furnished via telehealth in rural health clinics and federally qualified health centers during the covid-19 public health emergency

CT Computed tomography services furnished using equipment that does not meet each of the attributes of the national electrical manufacturers association (nema) xr-29-2013 standard

DA Oral health assessment by a licensed health professional other than a dentist

E1 Upper left, eyelid

E2 Lower left, eyelid

E3 Upper right, eyelid

E4 Lower right, eyelid

EA Erythropoietic stimulating agent (esa) administered to treat anemia due to anti-cancer chemotherapy

EB Erythropoietic stimulating agent (esa) administered to treat anemia due to anti-cancer radiotherapy

EC Erythropoietic stimulating agent (esa) administered to treat anemia not due to anti-cancer radiotherapy or anti-cancer chemotherapy

ED Hematocrit level has exceeded 39% (or hemoglobin level has exceeded 13.0 g/dl) for 3 or more consecutive billing cycles immediately prior to and including the current cycle

EE Hematocrit level has not exceeded 39% (or hemoglobin level has not exceeded 13.0 g/dl) for 3 or more consecutive billing cycles immediately prior to and including the current cycle

EJ Subsequent claims for a defined course of therapy, e.g., epo, sodium hyaluronate, infliximab

EM Emergency reserve supply (for esrd benefit only)

EP Service provided as part of medicaid early periodic screening diagnosis and treatment (epsdt) program

ER Items and services furnished by a provider-based, off-campus emergency department

ET Emergency services

EX Expatriate beneficiary

EY No physician or other licensed health care provider order for this item or service

F1 Left hand, second digit

F2 Left hand, third digit

F3 Left hand, fourth digit

F4 Left hand, fifth digit

F5 Right hand, thumb

F6 Right hand, second digit

F7 Right hand, third digit

F8 Right hand, fourth digit

F9 Right hand, fifth digit

FA Left hand, thumb

FB Item provided without cost to provider, supplier or practitioner, or full credit received for replaced device (examples, but not limited to, covered under warranty, replaced due to defect, free samples)

FC Partial credit received for replaced device

FP Service provided as part of family planning program

FQ The service was furnished using audio-only communication technology

FR The supervising practitioner was present through two-way, audio/video communication technology

FS Split (or shared) evaluation and management visit

FT Unrelated evaluation and management (e/m) visit on the same day as another e/m visit or during a global procedure (preoperative, postoperative period, or on the same day as the procedure, as applicable). (report when an e/m visit is furnished within the global period but is unrelated, or when one or more additional e/m visits furnished on the same day are unrelated)

FX X-ray taken using film

FY X-ray taken using computed radiography technology/cassette-based imaging

G0 Telehealth services for diagnosis, evaluation, or treatment, of symptoms of an acute stroke

G1 Most recent urr reading of less than 60

G2 Most recent urr reading of 60 to 64.9

G3 Most recent urr reading of 65 to 69.9

G4 Most recent urr reading of 70 to 74.9

G5 Most recent urr reading of 75 or greater

G6 Esrd patient for whom less than six dialysis sessions have been provided in a month

G7 Pregnancy resulted from rape or incest or pregnancy certified by physician as life threatening

G8 Monitored anesthesia care (mac) for deep complex, complicated, or markedly invasive surgical procedure

G9 Monitored anesthesia care for patient who has history of severe cardio-pulmonary condition

GA Waiver of liability statement issued as required by payer policy, individual case

GB Claim being re-submitted for payment because it is no longer covered under a global payment demonstration

GC This service has been performed in part by a resident under the direction of a teaching physician

GD Units of service exceeds medically unlikely edit value and represents reasonable and necessary services

GE This service has been performed by a resident without the presence of a teaching physician under the primary care exception

GF Non-physician (e.g. nurse practitioner (np), certified registered nurse anesthetist (crna), certified registered nurse (crn), clinical nurse specialist (cns), physician assistant (pa)) services in a critical access hospital

GG Performance and payment of a screening mammogram and diagnostic mammogram on the same patient, same day

GH Diagnostic mammogram converted from screening mammogram on same day

GJ "opt out" physician or practitioner emergency or urgent service

GK Reasonable and necessary item/service associated with a ga or gz modifier

GL Medically unnecessary upgrade provided instead of non-upgraded item, no charge, no advance beneficiary notice (abn)

GM Multiple patients on one ambulance trip

GN Services delivered under an outpatient speech language pathology plan of care

GO Services delivered under an outpatient occupational therapy plan of care

GP Services delivered under an outpatient physical therapy plan of care

GQ Via asynchronous telecommunications system

GR This service was performed in whole or in part by a resident in a department of veterans affairs medical center or clinic, supervised in accordance with va policy

GS Dosage of erythropoietin stimulating agent has been reduced and maintained in response to hematocrit or hemoglobin level

GT Via interactive audio and video telecommunication systems

GU Waiver of liability statement issued as required by payer policy, routine notice

GV Attending physician not employed or paid under arrangement by the patient's hospice provider

GW Service not related to the hospice patient's terminal condition

GX Notice of liability issued, voluntary under payer policy

GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit

GZ Item or service expected to be denied as not reasonable and necessary

H9 Court-ordered

HA Child/adolescent program

HB Adult program, non geriatric

HC Adult program, geriatric

HD Pregnant/parenting women's program

HE Mental health program

HF Substance abuse program

HG Opioid addiction treatment program

HH Integrated mental health/substance abuse program

HI Integrated mental health and intellectual disability/developmental disabilities program

HJ Employee assistance program

HK Specialized mental health programs for high-risk populations

HL Intern

HM Less than bachelor degree level

HN Bachelors degree level

HO Masters degree level

HP Doctoral level

HQ Group setting

HR Family/couple with client present

HS Family/couple without client present

HT Multi-disciplinary team

HU Funded by child welfare agency

HV Funded state addictions agency

HW Funded by state mental health agency

HX Funded by county/local agency

HY Funded by juvenile justice agency

HZ Funded by criminal justice agency

J1 Competitive acquisition program no-pay submission for a prescription number

J2 Competitive acquisition program, restocking of emergency drugs after emergency administration

J3 Competitive acquisition program (cap), drug not available through cap as written, reimbursed under average sales price methodology

J4 Dmepos item subject to dmepos competitive bidding program that is furnished by a hospital upon discharge

J5 Off-the-shelf orthotic subject to dmepos competitive bidding program that is furnished as part of a physical therapist or occupational therapist professional service

JA Administered intravenously

JB Administered subcutaneously

JC Skin substitute used as a graft

JD Skin substitute not used as a graft

JE Administered via dialysate

JF Compounded drug

JG Drug or biological acquired with 340b drug pricing program discount, reported for informational purposes

JK One month supply or less of drug or biological

JL Three month supply of drug or biological

JW Drug amount discarded/not administered to any patient

JZ Zero drug amount discarded/not administered to any patient

K0 Lower extremity prosthesis functional level 0 - does not have the ability or potential to ambulate or transfer safely with or without assistance and a prosthesis does not enhance their quality of life or mobility.

K1 Lower extremity prosthesis functional level 1 - has the ability or potential to use a prosthesis for transfers or ambulation on level surfaces at fixed cadence. typical of the limited and unlimited household ambulator.

K2 Lower extremity prosthesis functional level 2 - has the ability or potential for ambulation with the ability to traverse low level environmental barriers such as curbs, stairs or uneven surfaces. typical of the limited community ambulator.

K3 Lower extremity prosthesis functional level 3 - has the ability or potential for ambulation with variable cadence. typical of the community ambulator who has the ability to transverse most environmental barriers and may have vocational, therapeutic, or exercise activity that demands prosthetic utilization beyond simple locomotion.

K4 Lower extremity prosthesis functional level 4 - has the ability or potential for prosthetic ambulation that exceeds the basic ambulation skills, exhibiting high impact, stress, or energy levels, typical of the prosthetic demands of the child, active adult, or athlete.

KA Add on option/accessory for wheelchair

KB Beneficiary requested upgrade for abn, more than 4 modifiers identified on claim

KC Replacement of special power wheelchair interface

KD Drug or biological infused through dme

KE Bid under round one of the dmepos competitive bidding program for use with non-competitive bid base equipment

KF Item designated by fda as class iii device

KG Dmepos item subject to dmepos competitive bidding program number 1

KH Dmepos item, initial claim, purchase or first month rental

KI Dmepos item, second or third month rental

KJ Dmepos item, parenteral enteral nutrition (pen) pump or capped rental, months four to fifteen

KK Dmepos item subject to dmepos competitive bidding program number 2

KL Dmepos item delivered via mail

KM Replacement of facial prosthesis including new impression/moulage

KN Replacement of facial prosthesis using previous master model

KO Single drug unit dose formulation

KP First drug of a multiple drug unit dose formulation

KQ Second or subsequent drug of a multiple drug unit dose formulation

KR Rental item, billing for partial month

KS Glucose monitor supply for diabetic beneficiary not treated with insulin

KT Beneficiary resides in a competitive bidding area and travels outside that competitive bidding area and receives a competitive bid item

KU Dmepos item subject to dmepos competitive bidding program number 3

KV Dmepos item subject to dmepos competitive bidding program that is furnished as part of a professional service

KW Dmepos item subject to dmepos competitive bidding program number 4

KX Requirements specified in the medical policy have been met

KY Dmepos item subject to dmepos competitive bidding program number 5

KZ New coverage not implemented by managed care

L1 Provider attestation that the hospital laboratory test(s) is not packaged under the hospital opps

LC Left circumflex coronary artery

LD Left anterior descending coronary artery

LL Lease/rental (use the 'll' modifier when dme equipment rental is to be applied against the purchase price)

LM Left main coronary artery

LR Laboratory round trip

LS Fda-monitored intraocular lens implant

LT Left side (used to identify procedures performed on the left side of the body)

LU Fractionated payment

M2 Medicare secondary payer (msp)

MA Ordering professional is not required to consult a clinical decision support mechanism due to service being rendered to a patient with a suspected or confirmed emergency medical condition

MB Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of insufficient internet access

MC Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of electronic health record or clinical decision support mechanism vendor issues

MD Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of extreme and uncontrollable circumstances

ME The order for this service adheres to appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional

MF The order for this service does not adhere to the appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional

MG The order for this service does not have applicable appropriate use criteria in the qualified clinical decision support mechanism consulted by the ordering professional

MH Unknown if ordering professional consulted a clinical decision support mechanism for this service, related information was not provided to the furnishing professional or provider

MS Six month maintenance and servicing fee for reasonable and necessary parts and labor which are not covered under any manufacturer or supplier warranty

N1 Group 1 oxygen coverage criteria met

N2 Group 2 oxygen coverage criteria met

N3 Group 3 oxygen coverage criteria met

NB Nebulizer system, any type, fda-cleared for use with specific drug

NR New when rented (use the 'nr' modifier when dme which was new at the time of rental is subsequently purchased)

NU New equipment

P1 A normal healthy patient

P2 A patient with mild systemic disease

P3 A patient with severe systemic disease

P4 A patient with severe systemic disease that is a constant threat to life

P5 A moribund patient who is not expected to survive without the operation

P6 A declared brain-dead patient whose organs are being removed for donor purposes

PA Surgical or other invasive procedure on wrong body part

PB Surgical or other invasive procedure on wrong patient

PC Wrong surgery or other invasive procedure on patient

PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days

PI Positron emission tomography (pet) or pet/computed tomography (ct) to inform the initial treatment strategy of tumors that are biopsy proven or strongly suspected of being cancerous based on other diagnostic testing

PL Progressive addition lenses

PM Post mortem

PN Non-excepted service provided at an off-campus, outpatient, provider-based department of a hospital

PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital

PS Positron emission tomography (pet) or pet/computed tomography (ct) to inform the subsequent treatment strategy of cancerous tumors when the beneficiary's treating physician determines that the pet study is needed to inform subsequent anti-tumor strategy

PT Colorectal cancer screening test; converted to diagnostic test or other procedure

Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study

Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study

Q2 Demonstration procedure/service

Q3 Live kidney donor surgery and related services

Q4 Service for ordering/referring physician qualifies as a service exemption

Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area

Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area

Q7 One class a finding

Q8 Two class b findings

Q9 One class b and two class c findings

QA Prescribed amounts of stationary oxygen for daytime use while at rest and nighttime use differ and the average of the two amounts is less than 1 liter per minute (lpm)

QB Prescribed amounts of stationary oxygen for daytime use while at rest and nighttime use differ and the average of the two amounts exceeds 4 liters per minute (lpm) and portable oxygen is prescribed

QC Single channel monitoring

QD Recording and storage in solid state memory by a digital recorder

QE Prescribed amount of stationary oxygen while at rest is less than 1 liter per minute (lpm)

QF Prescribed amount of stationary oxygen while at rest exceeds 4 liters per minute (lpm) and portable oxygen is prescribed

QG Prescribed amount of stationary oxygen while at rest is greater than 4 liters per minute (lpm)

QH Oxygen conserving device is being used with an oxygen delivery system

QJ Services/items provided to a prisoner or patient in state or local custody, however the state or local government, as applicable, meets the requirements in 42 cfr 411.4 (b)

QK Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals

QL Patient pronounced dead after ambulance called

QM Ambulance service provided under arrangement by a provider of services

QN Ambulance service furnished directly by a provider of services

QP Documentation is on file showing that the laboratory test(s) was ordered individually or ordered as a cpt-recognized panel other than automated profile codes 80002-80019, g0058, g0059, and g0060.

QQ Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional

QR Prescribed amounts of stationary oxygen for daytime use while at rest and nighttime use differ and the average of the two amounts is greater than 4 liters per minute (lpm)

QS Monitored anesthesia care service

QT Recording and storage on tape by an analog tape recorder

QW Clia waived test

QX Crna service: with medical direction by a physician

QY Medical direction of one certified registered nurse anesthetist (crna) by an anesthesiologist

QZ Crna service: without medical direction by a physician

RA Replacement of a dme, orthotic or prosthetic item

RB Replacement of a part of a dme, orthotic or prosthetic item furnished as part of a repair

RC Right coronary artery

RD Drug provided to beneficiary, but not administered "incident-to"

RE Furnished in full compliance with fda-mandated risk evaluation and mitigation strategy (rems)

RI Ramus intermedius coronary artery

RR Rental (use the 'rr' modifier when dme is to be rented)

RT Right side (used to identify procedures performed on the right side of the body)

SA Nurse practitioner rendering service in collaboration with a physician

SB Nurse midwife

SC Medically necessary service or supply

SD Services provided by registered nurse with specialized, highly technical home infusion training

SE State and/or federally-funded programs/services

SF Second opinion ordered by a professional review organization (pro) per section 9401, p.l. 99-272 (100% reimbursement - no medicare deductible or coinsurance)

SG Ambulatory surgical center (asc) facility service

SH Second concurrently administered infusion therapy

SJ Third or more concurrently administered infusion therapy

SK Member of high risk population (use only with codes for immunization)

SL State supplied vaccine

SM Second surgical opinion

SN Third surgical opinion

SQ Item ordered by home health

SS Home infusion services provided in the infusion suite of the iv therapy provider

ST Related to trauma or injury

SU Procedure performed in physician's office (to denote use of facility and equipment)

SV Pharmaceuticals delivered to patient's home but not utilized

SW Services provided by a certified diabetic educator

SY Persons who are in close contact with member of high-risk population (use only with codes for immunization)

SZ Habilitative services

T1 Left foot, second digit

T2 Left foot, third digit

T3 Left foot, fourth digit

T4 Left foot, fifth digit

T5 Right foot, great toe

T6 Right foot, second digit

T7 Right foot, third digit

T8 Right foot, fourth digit

T9 Right foot, fifth digit

TA Left foot, great toe

TB Drug or biological acquired with 340b drug pricing program discount, reported for informational purposes

TC Technical component; under certain circumstances, a charge may be made for the technical component alone; under those circumstances the technical component charge is identified by adding modifier 'tc' to the usual procedure number; technical component charges are institutional charges and not billed separately by physicians; however, portable x-ray suppliers only bill for technical component and should utilize modifier tc; the charge data from portable x-ray suppliers will then be used to build customary and prevailing profiles

TD Rn

TE Lpn/lvn

TF Intermediate level of care

TG Complex/high tech level of care

TH Obstetrical treatment/services, prenatal or postpartum

TJ Program group, child and/or adolescent

TK Extra patient or passenger, non-ambulance

TL Early intervention/individualized family service plan (ifsp)

TM Individualized education program (iep)

TN Rural/outside providers' customary service area

TP Medical transport, unloaded vehicle

TQ Basic life support transport by a volunteer ambulance provider

TR School-based individualized education program (iep) services provided outside the public school district responsible for the student

TS Follow-up service

TT Individualized service provided to more than one patient in same setting

TU Special payment rate, overtime

TV Special payment rates, holidays/weekends

TW Back-up equipment

U1 Medicaid level of care 1, as defined by each state

U2 Medicaid level of care 2, as defined by each state

U3 Medicaid level of care 3, as defined by each state

U4 Medicaid level of care 4, as defined by each state

U5 Medicaid level of care 5, as defined by each state

U6 Medicaid level of care 6, as defined by each state

U7 Medicaid level of care 7, as defined by each state

U8 Medicaid level of care 8, as defined by each state

U9 Medicaid level of care 9, as defined by each state

UA Medicaid level of care 10, as defined by each state

UB Medicaid level of care 11, as defined by each state

UC Medicaid level of care 12, as defined by each state

UD Medicaid level of care 13, as defined by each state

UE Used durable medical equipment

UF Services provided in the morning

UG Services provided in the afternoon

UH Services provided in the evening

UJ Services provided at night

UK Services provided on behalf of the client to someone other than the client (collateral relationship)

UN Two patients served

UP Three patients served

UQ Four patients served

UR Five patients served

US Six or more patients served

V1 Demonstration modifier 1

V2 Demonstration modifier 2

V3 Demonstration modifier 3

V4 Demonstration modifier 4

V5 Vascular catheter (alone or with any other vascular access)

V6 Arteriovenous graft (or other vascular access not including a vascular catheter)

V7 Arteriovenous fistula only (in use with two needles)

V8 Infection present

V9 No infection present

VM Medicare diabetes prevention program (mdpp) virtual make-up session

VP Aphakic patient

X1 Continuous/broad services: for reporting services by clinicians, who provide the principal care for a patient, with no planned endpoint of the relationship; services in this category represent comprehensive care, dealing with the entire scope of patient problems, either directly or in a care coordination role; reporting clinician service examples include, but are not limited to: primary care, and clinicians providing comprehensive care to patients in addition to specialty care

X2 Continuous/focused services: for reporting services by clinicians whose expertise is needed for the ongoing management of a chronic disease or a condition that needs to be managed and followed with no planned endpoint to the relationship; reporting clinician service examples include but are not limited to: a rheumatologist taking care of the patient's rheumatoid arthritis longitudinally but not providing general primary care services

X3 Episodic/broad services: for reporting services by clinicians who have broad responsibility for the comprehensive needs of the patient that is limited to a defined period and circumstance such as a hospitalization; reporting clinician service examples include but are not limited to the hospitalist's services rendered providing comprehensive and general care to a patient while admitted to the hospital

X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period

X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician

XE Separate encounter, a service that is distinct because it occurred during a separate encounter

XP Separate practitioner, a service that is distinct because it was performed by a different practitioner

XS Separate structure, a service that is distinct because it was performed on a separate organ/structure

XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service

ZA Novartis/sandoz

ZB Pfizer/hospira

ZC Merck/samsung bioepis

HCPCS Level II Modifiers

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