A56 ICD-10-CM Code: Other sexually transmitted chlamydial diseases

A56 isn’t billable on its own. Choose one of the 10 billable codes beneath it, the one the documentation supports.

Official description

A56

Other sexually transmitted chlamydial diseases

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

Billable codes under A56

A56 can’t be reported on its own. Choose the code below that matches what the note documents.

A56.0 · Chlamydial infection of lower genitourinary tract

A56.00Chlamydial infection of lower genitourinary tract, unspecified A56.01Chlamydial cystitis and urethritis A56.02Chlamydial vulvovaginitis A56.09Other chlamydial infection of lower genitourinary tract

A56.1 · Chlamydial infection of pelviperitoneum and other genitourinary organs

A56.11Chlamydial female pelvic inflammatory disease A56.19Other chlamydial genitourinary infection

A56.2Chlamydial infection of genitourinary tract, unspecified A56.3Chlamydial infection of anus and rectum A56.4Chlamydial infection of pharynx A56.8Sexually transmitted chlamydial infection of other sites

Where A56 sits

1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
2
Section
Infections with a predominantly sexual mode of transmission (A50-A64)
3
Category A56
Other sexually transmitted chlamydial diseases
4
Code A56
Other sexually transmitted chlamydial diseases

Notes for this code

Inclusion terms

No inclusion terms are listed for A56.

Code first

No “code first” instruction is listed for A56.

Use additional code

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

Excludes1

Conditions that should not be reported together with this code.

neonatal chlamydial conjunctivitis (P39.1)
neonatal chlamydial pneumonia (P23.1)

Excludes2

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

chlamydial lymphogranuloma (A55)
conditions classified to A74.-

Source and release

Data release: U.S. ICD-10-CM · FY 2027
Effective date: Oct 1, 2026
Publisher: Vero Scribe Inc.

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

Frequently asked questions

What does ICD-10-CM code A56 mean?

A56 is the FY 2027 U.S. ICD-10-CM code for “Other sexually transmitted chlamydial diseases.”

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

No. A56 has 10 billable codes beneath it in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is A56 located in ICD-10-CM?

A56 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.

What coding notes are listed for A56?

No inclusion terms are listed for A56 in this reference record. No code-first instruction is listed. Excludes1 notes: neonatal chlamydial conjunctivitis (P39.1); neonatal chlamydial pneumonia (P23.1). Excludes2 notes: chlamydial lymphogranuloma (A55); conditions classified to A74.-.