C91.40
C91.40 — Hairy cell leukemia not having achieved remission
Billable / specific codeICD-10-CM
C91.40 is a billable, specific ICD-10-CM code for hairy cell leukemia not having achieved remission. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hairy cell leukemia with failed remission
- Hairy cell leukemia NOS
Risk adjustment
C91.40 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 22 Bladder, Colorectal, and Other Cancers0.363 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
C91.40 is named in 47 Medicare coverage policies — 47 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52479Oral Anticancer Drugs - Policy Article
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- A52479Oral Anticancer Drugs - Policy Article
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Related codes at this level
Codes that share C91.4. If C91.40 is not quite right, the correct code is usually one of these.
Questions about C91.40
- Is C91.40 a billable ICD-10-CM code?
- Yes. C91.40 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C91.40 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).