AutoICD API

C91.4

Non-billable

Hairy cell leukemia

Hairy cell 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

Parent Code

C91

Child Codes

3

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Leukemic reticuloendotheliosis

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 (3)

C91.40

Hairy cell leukemia not having achieved remission

BillableC91.41

Hairy cell leukemia, in remission

BillableC91.42

Hairy cell leukemia, in relapse

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code C91.4?

ICD-10-CM code C91.4 represents "Hairy cell leukemia". It is a non-billable header code — use a more specific child code for billing purposes.

Is C91.4 a billable code?

No, C91.4 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 3 child codes under C91.4.

What chapter is C91.4 in?

C91.4 is in Chapter 2: Neoplasms (codes C00-D49).

What codes cannot be used with C91.4?

C91.4 has Excludes1 notes indicating codes that cannot be used together with it, including: personal history of leukemia (Z85.6).

What are the subcategories under C91.4?

C91.4 has 3 child codes, including: C91.40 (Hairy cell leukemia not having achieved remission), C91.41 (Hairy cell leukemia, in remission), C91.42 (Hairy cell leukemia, in relapse).

What are the UMLS CUIs for C91.4?

C91.4 is linked to 1 UMLS Concept Unique Identifier: C0023443. 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.