C91.41 – Hairy cell leukemia, in remission

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lymphoid, hematopoietic and related tissue

Billable code

ICD-10-CM code C91.41
Code
C91.41 (claims format: C9141)
Description
Hairy cell leukemia, in remission
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
Parent codes
C91 › C91.4

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

C91 – Lymphoid leukemia

Excludes1 (not coded here):
  • personal history of leukemia (Z85.6)

C91.4 – Hairy cell leukemia

Applicable to:
  • Leukemic reticuloendotheliosis

Block C81-C96

Excludes2 (not included here):
  • Kaposi's sarcoma of lymph nodes (C46.3)
  • secondary and unspecified neoplasm of lymph nodes (C77.-)
  • secondary neoplasm of bone marrow (C79.52)
  • secondary neoplasm of spleen (C78.89)

Related codes in C91.4

Frequently asked questions

What is ICD-10 code C91.41?

C91.41 is the ICD-10-CM code for hairy cell leukemia, in remission, in the block C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).

Is C91.41 a billable code?

Yes. C91.41 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C91.41 belong to?

It belongs to category C91 – Lymphoid leukemia.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.