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A74.8

A74.8: Other chlamydial diseases

Non-billable headerICD-10-CM

A74.8 is a non-billable header ICD-10-CM code for other chlamydial diseases. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above A74.8

A category’s note binds every code beneath it.

Written on A74: Other diseases caused by chlamydiae

  • neonatal chlamydial conjunctivitis (P39.1)
  • neonatal chlamydial pneumonia (P23.1)
  • Reiter's disease (M02.3-)
  • sexually transmitted chlamydial diseases (A55-A56)

Excludes2 inherited from the categories above A74.8

Not part of this code, but both may be coded when both are present.

Written on A74: Other diseases caused by chlamydiae

  • chlamydial pneumonia (J16.0)

Other codes that can never be billed with A74.8

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • K65Peritonitis
  • K67Disorders of peritoneum in infectious diseases classified elsewhere

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead A74.8

2 child codes. Green means billable.

Other codes under A74

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.