T88.1 Other complications following immunization, not elsewhere classified

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Other complications following immunization, not elsewhere classified is T88.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
T80-T88: Complications of surgical and medical care, not elsewhere classified (T80-T88)
Category T88
15 codes (13 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T88.1:

  • Vaccinia (generalized) (localized)
  • Rash (toxic) › following immunization
  • Eczema (acute) (chronic) (erythematous) (fissum) (rubrum) (squamous) › vaccination, vaccinatum
  • Cowpox › due to vaccination
  • Complication (s) (from) (of) › vaccination
  • Complication (s) (from) (of) › vaccination › rash
  • Complication (s) (from) (of) › vaccination › vaccinia (generalized) (localized)
  • Complication (s) (from) (of) › vaccination › reaction (allergic)
Excludes1
Not coded here. These conditions should NOT be coded together with T88.1.
  • vaccinia not from vaccine (B08.011)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • anaphylactic shock due to serum (T80.5-)
  • other serum reactions (T80.6-)
  • postimmunization arthropathy (M02.2)
  • postimmunization encephalitis (G04.02)
  • postimmunization fever (R50.83)

Inclusion Terms

  • Generalized vaccinia
  • Rash following immunization

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

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

References

Related Codes

Parent Code

T88 Other complications of surgical and medical care, not elsewhere classified

Related Codes in T88

T88 Other complications of surgical and medical care, not elsewhere classified T88.0 Infection following immunization T88.2 Shock due to anesthesia T88.3 Malignant hyperthermia due to anesthesia T88.4 Failed or difficult intubation T88.5 Other complications of anesthesia T88.51 Hypothermia following anesthesia T88.52 Failed moderate sedation during procedure T88.53 Unintended awareness under general anesthesia during procedure T88.59 Other complications of anesthesia T88.6 Anaphylactic reaction due to adverse effect of correct drug or medicament properly administered T88.7 Unspecified adverse effect of drug or medicament T88.8 Other specified complications of surgical and medical care, not elsewhere classified T88.9 Complication of surgical and medical care, unspecified
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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