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C91.Z

Non-billable

Other lymphoid leukemia

C91.Z is the ICD-10-CM code for Other lymphoid leukemia. It is a non-billable category code — use a more specific child code such as C91.Z0 for billing.

Status
Header (non-billable)
Chapter
C00-D49
Parent
C91
Subcodes
3
Edition
FY2026

C00-D49 Neoplasms

Includes

  • •T-cell large granular lymphocytic leukemia (associated with rheumatoid arthritis)

Frequently asked questions

What is ICD-10 code C91.Z?
C91.Z is the ICD-10-CM code for "Other lymphoid leukemia". It falls under C00-D49 Neoplasms.
Is C91.Z a billable code?
No — C91.Z is a non-billable header code. Use a more specific child code (such as C91.Z0) for billing.
What are the subcodes of C91.Z?
C91.Z has 3 more specific child codes, including C91.Z0, C91.Z1, C91.Z2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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