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Ch. 2: Neoplasms (C00-D49)
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Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
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C91 Lymphoid leukemia
› C91.4
C91.4
Hairy cell leukemia
ICD-10-CM category (non-billable header) code — part of Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
Code Details
Billable
No — use a more specific child code
Chapter
Chapter 2: Neoplasms (C00-D49)
Section
Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
Parent code
C91 — Lymphoid leukemia
Coding Notes
Inclusion Terms
Leukemic reticuloendotheliosis
Subcategories (3)
C91.40
Hairy cell leukemia not having achieved remission
C91.41
Hairy cell leukemia, in remission
C91.42
Hairy cell leukemia, in relapse
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