U.S. ICD-10-CM · FY 2027

A56.01 ICD-10-CM Code: Chlamydial cystitis and urethritis

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

Code definition

Official description

A56.01

Chlamydial cystitis and urethritis

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

Classification

Where A56.01 sits

  1. 1

    Chapter 1

    Certain infectious and parasitic diseases (A00-B99)

  2. 2

    Section

    Infections with a predominantly sexual mode of transmission (A50-A64)

  3. 3

    Category A56

    Other sexually transmitted chlamydial diseases

  4. 4

    Subcategory A56.0

    Chlamydial infection of lower genitourinary tract

  5. 5

    Code A56.01

    Chlamydial cystitis and urethritis

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for A56.01.

Code first

No “code first” instruction is listed for A56.01.

Use additional code

No “use additional code” instruction is listed for A56.01.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for A56.01.

Excludes2

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

No Excludes2 note is listed for A56.01.

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 A56.01 mean?

A56.01 is the FY 2027 U.S. ICD-10-CM code for “Chlamydial cystitis and urethritis.”

Is A56.01 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, A56.01 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 A56.01 located in ICD-10-CM?

A56.01 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Infections with a predominantly sexual mode of transmission (A50-A64) (A50–A64), under category A56, Other sexually transmitted chlamydial diseases and subcategory A56.0, Chlamydial infection of lower genitourinary tract.

What coding notes are listed for A56.01?

No inclusion terms are listed for A56.01 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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