U.S. ICD-10-CM · FY 2027

K37 ICD-10-CM Code: Unspecified appendicitis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

K37

Unspecified appendicitis

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where K37 sits

  1. 1

    Chapter 11

    Diseases of the digestive system (K00-K95)

  2. 2

    Section

    Diseases of appendix (K35-K38)

  3. 3

    Category K37

    Unspecified appendicitis

  4. 4

    Code K37

    Unspecified appendicitis

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for K37.

Code first

No “code first” instruction is listed for K37.

Use additional code

No “use additional code” instruction is listed for K37.

Excludes1

Conditions that should not be reported together with this code.

  • unspecified appendicitis with peritonitis (K35.2-, K35.3-)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for K37.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code K37 mean?

K37 is the FY 2027 U.S. ICD-10-CM code for “Unspecified appendicitis.”

Is K37 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, K37 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is K37 located in ICD-10-CM?

K37 is listed in Chapter 11, Diseases of the digestive system (K00-K95), within Diseases of appendix (K35-K38) (K35–K38), under category K37, Unspecified appendicitis.

What coding notes are listed for K37?

No inclusion terms are listed for K37 in this reference record. No code-first instruction is listed. Excludes1 notes: unspecified appendicitis with peritonitis (K35.2-, K35.3-). No Excludes2 note is listed.

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