Z99.12 Encounter for respirator [ventilator] dependence during power failure

The ICD-10-CM code for Encounter for respirator [ventilator] dependence during power failure is Z99.12 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

21: Factors influencing health status and contact with health services (Z00-Z99)

Section

Z77-Z99: Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Category Z99

10 codes (7 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to Z99.12:

• Admission (for) › respirator [ventilator] use during power failure
• Encounter (with health service) (for) › respirator [ventilator] use during power failure

U.S. Hospital Utilization

• An estimated 95 U.S. inpatient stays in 2017 included Z99.12 among the documented diagnoses.
• 60 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

External cause of morbidity and Z codes; assign all needed codes

between healthcare facilities, or provide additional information relevant to a patient encounter. The ICD-10-CM Official Guidelines for Coding and Reporting identify which codes maybe assigned as principal or first-listed diagnosis only, secondary diagnosis only, or principal/first-listed or secondary (depending on the circumstances). Possible applicable Z codes include: Z59.0-, Homelessness Z59.1, Inadequate housing Z59.5, Extreme poverty Z75.1, Person awaiting admission to adequate facility elsewhere Z75.3, Unavailability and inaccessibility of health-care facilities Z75.4, Unavailability and inaccessibility of other helping agencies Z76.2, Encounter for health supervision and care of other healthy infant and child Z99.12, Encounter for respirator [ventilator] dependence during power failure The external cause of morbidity codes and the Z codes listed above are not an all-inclusive list. Other codes may be applicable to the encounter based upon the documentation. Assign as many codes as necessary to fully explain each healthcare encounter. Since patient history information may be very limited, use any available documentation to assign the appropriate external cause of morbidity and Z codes.

List of Z codes (partial; preceding guideline context missing)

Z31.81 Encounter for male factor infertility in female patient Z31.83 Encounter for assisted reproductive fertility procedure cycle Z31.84 Encounter for fertility preservation procedure Z34 Encounter for supervision of normal pregnancy Z39 Encounter for maternal postpartum care and examination Z38 Liveborn infants according to place of birth and type of delivery Z40 Encounter for prophylactic surgery Z42 Encounter for plastic and reconstructive surgery following medical procedure or healed injury Z51.0 Encounter for antineoplastic radiation therapy Z51.1- Encounter for antineoplastic chemotherapy and immunotherapy Z52 Donors of organs and tissues Except: Z52.9, Donor of unspecified organ or tissue Z76.1 Encounter for health supervision and care of foundling Z76.2 Encounter for health supervision and care of other healthy infant and child Z99.12 Encounter for respirator [ventilator] dependence during power failure

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)