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C91.40 - Hairy cell leukemia not having achieved remission


The ICD 10 Code for Hairy cell leukemia not having achieved remission is listed as C91.40.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: C91.40
Description: Hairy cell leukemia not having achieved remission
  • Hairy cell leukemia with failed remission
  • Hairy cell leukemia NOS
Diagnostic Related Groups
(MS-DRG v30.0)
011 - Tracheostomy For Face,mouth & Neck Diagnoses W Mcc
012 - Tracheostomy For Face,mouth & Neck Diagnoses W Cc
013 - Tracheostomy For Face,mouth & Neck Diagnoses W/o Cc/mcc
820 - Lymphoma & Leukemia W Major O.r. Procedure W Mcc
821 - Lymphoma & Leukemia W Major O.r. Procedure W Cc
822 - Lymphoma & Leukemia W Major O.r. Procedure W/o Cc/mcc
823 - Lymphoma & Non-acute Leukemia W Other O.r. Proc W Mcc
824 - Lymphoma & Non-acute Leukemia W Other O.r. Proc W Cc
825 - Lymphoma & Non-acute Leukemia W Other O.r. Proc W/o Cc/mcc
840 - Lymphoma & Non-acute Leukemia W Mcc
841 - Lymphoma & Non-acute Leukemia W Cc
842 - Lymphoma & Non-acute Leukemia W/o Cc/mcc
Chapter Neoplasms (C00-D49)
Block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
Parent C91.4 - Hairy cell leukemia
ICD-9-CM Diagnosis Codes General Equivalence Mappings (GEMS):
ICD 9 Dx Code: 202.40 - Leukemic reticuloendotheliosis, unspecified site, extranodal and solid organ sites (approximate)
ICD-10-CM Siblings (same level / similar specificity) of C91.40:
C91.41 - Hairy cell leukemia, in remission
C91.42 - Hairy cell leukemia, in relapse