B99: Other and unspecified infectious diseases
Codes under B99 (Other and unspecified infectious diseases). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| B99.8 | Other infectious disease | ✓ |
| B99.8 | Other infectious disease | ✓ |
| B99.9 | Unspecified infectious disease | ✓ |
| B99.9 | Unspecified infectious disease | ✓ |
Frequently asked questions
What is ICD-10-CM code B99?
B99 is an ICD-10-CM category covering Other and unspecified infectious diseases. It contains 4 more specific diagnosis codes, 4 of which are billable.
Is B99 a billable code?
No — B99 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example B99.8 — Other infectious disease). 4 of the 4 codes under B99 are billable.
What codes fall under B99?
B99 includes B99.8, B99.8, B99.9, B99.9. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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