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A56

Non-billable

Other sexually transmitted chlamydial diseases

A56 is the ICD-10-CM code for Other sexually transmitted chlamydial diseases. It is a non-billable category code — use a more specific child code such as A56.0 for billing.

Status
Header (non-billable)
Chapter
A00-B99
Subcodes
6
Edition
FY2026

A00-B99 Certain infectious and parasitic diseases

Includes

  • •sexually transmitted diseases due to Chlamydia
  • •trachomatis

Excludes1 — not coded here

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

Excludes2 — not included here

  • •chlamydial lymphogranuloma (A55)
  • •conditions classified to A74.-

Frequently asked questions

What is ICD-10 code A56?
A56 is the ICD-10-CM code for "Other sexually transmitted chlamydial diseases". It falls under A00-B99 Certain infectious and parasitic diseases.
Is A56 a billable code?
No — A56 is a non-billable header code. Use a more specific child code (such as A56.0) for billing.
What are the subcodes of A56?
A56 has 6 more specific child codes, including A56.0, A56.1, A56.2.
What is excluded from A56?
Excludes1 (not coded here): neonatal chlamydial conjunctivitis (P39.1); neonatal chlamydial pneumonia (P23.1).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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