Is B33.3 a billable ICD-10 code?

Yes. B33.3 (Retrovirus infections, not elsewhere classified) is billable and can be used for insurance claims. Always verify payer-specific requirements.

B33.3 ✓ Billable

Retrovirus infections, not elsewhere classified

Q: What is ICD-10 code B33.3?

ICD-10-CM code B33.3 stands for "Retrovirus infections, not elsewhere classified". It is a billable code in the Certain Infectious and Parasitic Diseases chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases

Code

B33.3

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Certain Infectious and Parasitic Diseases

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code B33.3?

ICD-10-CM code B33.3 represents Retrovirus infections, not elsewhere classified. It is a billable diagnosis code in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.

Is B33.3 billable?

Yes. B33.3 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is B33.3 in?

B33.3 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.

Related codes in the B33 category

B33 Other viral diseases, not elsewhere classified Non-billable B33.0 Epidemic myalgia Billable B33.1 Ross River disease Billable B33.2 Viral carditis Non-billable B33.4 Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] Billable B33.8 Other specified viral diseases Billable B33.20 Viral carditis, unspecified Billable B33.21 Viral endocarditis Billable

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