B33.3 Retrovirus infections, not elsewhere classified

Billable ICD-10-CM code, FY2026.

Applicable to

• Retrovirus infection NOS

MS-DRG index

Defines the logic of DRG(s) 865-866 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 079.59 Other specified retrovirus (approximate)

Code annotations containing back-references to B33.3

Back-references to B33.3

• Type 1 Excludes: B34 Viral infection of unspecified site ("retrovirus infection NOS (B33.3)")

Back-references to B33

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B33.3

• Human › T-cell lymphotropic virus › type-1 (HTLV-I) infection
• Infection, infected, infective (opportunistic) › human › T-cell lymphotropic virus type-1 (HTLV-1)
• Infection, infected, infective (opportunistic) › retrovirus

Nearby codes

• B33.20 Viral carditis, unspecified
• B33.21 Viral endocarditis
• B33.22 Viral myocarditis
• B33.23 Viral pericarditis
• B33.24 Viral cardiomyopathy
• B33.3 Retrovirus infections, not elsewhere classified (this code)
• B33.4 Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]
• B33.8 Other specified viral diseases