C91
Non-billableLymphoid leukemia
C91 is the ICD-10-CM code for Lymphoid leukemia. It is a non-billable category code — use a more specific child code such as C91.0 for billing.
- Status
- Header (non-billable)
- Chapter
- C00-D49
- Subcodes
- 9
- Edition
- FY2026
C00-D49 Neoplasms
Excludes1 — not coded here
- •personal history of leukemia (Z85.6)
Frequently asked questions
- What is ICD-10 code C91?
- C91 is the ICD-10-CM code for "Lymphoid leukemia". It falls under C00-D49 Neoplasms.
- Is C91 a billable code?
- No — C91 is a non-billable header code. Use a more specific child code (such as C91.0) for billing.
- What is excluded from C91?
- Excludes1 (not coded here): personal history of leukemia (Z85.6).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition