AutoICD API

C91

Non-billable

Lymphoid leukemia

Lymphoid leukemia

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

C81-C96

Child Codes

9

Coding Notes

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • personal history of leukemia (Z85.6)

Excludes 2

Conditions not included here, but the patient may have both

  • 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)

Child Codes (9)

C91.0

Acute lymphoblastic leukemia [ALL]

C91.1

Chronic lymphocytic leukemia of B-cell type

C91.3

Prolymphocytic leukemia of B-cell type

C91.4

Hairy cell leukemia

C91.5

Adult T-cell lymphoma/leukemia (HTLV-1-associated)

C91.6

Prolymphocytic leukemia of T-cell type

C91.9

Lymphoid leukemia, unspecified

C91.A

Mature B-cell leukemia Burkitt-type

C91.Z

Other lymphoid leukemia

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code C91?

ICD-10-CM code C91 represents "Lymphoid leukemia". It is a non-billable header code — use a more specific child code for billing purposes.

Is C91 a billable code?

No, C91 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 9 child codes under C91.

What chapter is C91 in?

C91 is in Chapter 2: Neoplasms (codes C00-D49).

What codes cannot be used with C91?

C91 has Excludes1 notes indicating codes that cannot be used together with it, including: personal history of leukemia (Z85.6).

What are the subcategories under C91?

C91 has 9 child codes, including: C91.0 (Acute lymphoblastic leukemia [ALL]), C91.1 (Chronic lymphocytic leukemia of B-cell type), C91.3 (Prolymphocytic leukemia of B-cell type), C91.4 (Hairy cell leukemia), and 5 more.

What are the UMLS CUIs for C91?

C91 is linked to 1 UMLS Concept Unique Identifier: C0023448. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.