All ICD10 Codes

C91

Non-Billable
ChapterC00–D49
Rankcategory
Official Description

Lymphoid leukemia

Use a more specific code (0 billable, 9 non-billable)
C91.0Acute lymphoblastic leukemia [ALL]has subcodesC91.1Chronic lymphocytic leukemia of B-cell typehas subcodesC91.3Prolymphocytic leukemia of B-cell typehas subcodesC91.4Hairy cell leukemiahas subcodesC91.5Adult T-cell lymphoma/leukemia (HTLV-1-associated)has subcodesC91.6Prolymphocytic leukemia of T-cell typehas subcodesC91.9Lymphoid leukemia, unspecifiedhas subcodesC91.AMature B-cell leukemia Burkitt-typehas subcodesC91.ZOther lymphoid leukemiahas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 2: Neoplasms (C00-D49).

C81-C96 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • personal history of leukemia (Z85.6)

Clinical Hierarchy

BillableHas subcodes
CH2Neoplasms (C00-D49)
C81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
C91Lymphoid leukemiaNot billable
C91.0Acute lymphoblastic leukemia [ALL]Subcodes
C91.1Chronic lymphocytic leukemia of B-cell typeSubcodes
C91.3Prolymphocytic leukemia of B-cell typeSubcodes
C91.4Hairy cell leukemiaSubcodes
C91.5Adult T-cell lymphoma/leukemia (HTLV-1-associated)Subcodes
C91.6Prolymphocytic leukemia of T-cell typeSubcodes
C91.9Lymphoid leukemia, unspecifiedSubcodes
C91.AMature B-cell leukemia Burkitt-typeSubcodes
C91.ZOther lymphoid leukemiaSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to C91:

blockC81-C96
Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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