A56 Other sexually transmitted chlamydial diseases

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Other sexually transmitted chlamydial diseases is A56 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
A50-A64: Infections with a predominantly sexual mode of transmission (A50-A64)
Category A56
13 codes (10 billable)
FY2026 Status
Stable since FY2024
Includes
  • sexually transmitted diseases due to Chlamydia
  • trachomatis
Excludes1
Not coded here. These conditions should NOT be coded together with A56.
  • neonatal chlamydial conjunctivitis (P39.1)
  • neonatal chlamydial pneumonia (P23.1)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • chlamydial lymphogranuloma (A55)
  • conditions classified to A74.-

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.a
Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

A56.0 Chlamydial infection of lower genitourinary tract A56.00 Chlamydial infection of lower genitourinary tract, unspecified A56.01 Chlamydial cystitis and urethritis A56.02 Chlamydial vulvovaginitis A56.09 Other chlamydial infection of lower genitourinary tract A56.1 Chlamydial infection of pelviperitoneum and other genitourinary organs A56.11 Chlamydial female pelvic inflammatory disease A56.19 Other chlamydial genitourinary infection A56.2 Chlamydial infection of genitourinary tract, unspecified A56.3 Chlamydial infection of anus and rectum A56.4 Chlamydial infection of pharynx A56.8 Sexually transmitted chlamydial infection of other sites

Related Codes in A56

A56.0 Chlamydial infection of lower genitourinary tract A56.00 Chlamydial infection of lower genitourinary tract, unspecified A56.01 Chlamydial cystitis and urethritis A56.02 Chlamydial vulvovaginitis A56.09 Other chlamydial infection of lower genitourinary tract A56.1 Chlamydial infection of pelviperitoneum and other genitourinary organs A56.11 Chlamydial female pelvic inflammatory disease A56.19 Other chlamydial genitourinary infection A56.2 Chlamydial infection of genitourinary tract, unspecified A56.3 Chlamydial infection of anus and rectum A56.4 Chlamydial infection of pharynx A56.8 Sexually transmitted chlamydial infection of other sites
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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