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C91.40

✓ Billable

Hairy cell leukemia not having achieved remission

Neoplasms (C00-D49)

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Also Known As

Hairy cell leukemia with failed remissionHairy cell leukemia NOS
✅ No additional coding notes for C91.40

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Code Information

CodeC91.40
BillableYes
ParentC91.4
CategoryNeoplasms (C00-D49)
Excludes10 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)