All ICD10 Codes

A74

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Other diseases caused by chlamydiae

Use a more specific code (2 billable, 1 non-billable)
A74.0Chlamydial conjunctivitisA74.8Other chlamydial diseaseshas subcodesA74.9Chlamydial infection, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

A70-A74 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • sexually transmitted chlamydial diseases (A55-A56)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • neonatal chlamydial conjunctivitis (P39.1)
  • neonatal chlamydial pneumonia (P23.1)
  • Reiter's disease (M02.3-)
  • sexually transmitted chlamydial diseases (A55-A56)
Excludes2(Not included here. Code separately if applicable.)
  • chlamydial pneumonia (J16.0)

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
A70-A74Other diseases caused by chlamydiae (A70-A74)
A74Other diseases caused by chlamydiaeNot billable
A74.0Chlamydial conjunctivitisBillable
A74.8Other chlamydial diseasesSubcodes
A74.9Chlamydial infection, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A74:

blockA70-A74
Other diseases caused by chlamydiae (A70-A74)
View context instructions
chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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