A74.8 – Other chlamydial diseases

ICD-10-CM 2027 diagnosis code · Other diseases caused by chlamydiae

Non-billable header

ICD-10-CM code A74.8

Code: A74.8 (claims format: A748)
Description: Other chlamydial diseases
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: A70-A74 Other diseases caused by chlamydiae
Parent codes: A74

Billable codes under A74.8

A74.8 is a header code and cannot be used on claims. Choose the most specific code:

A74.81 – Chlamydial peritonitisBillable
A74.89 – Other chlamydial diseasesBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

A74 – Other diseases caused by chlamydiae

Excludes1 (not coded here):

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):

chlamydial pneumonia (J16.0)

Block A70-A74

Excludes1 (not coded here):

sexually transmitted chlamydial diseases (A55-A56)

Related codes in A74

A74.0 – Chlamydial conjunctivitisBillable
A74.9 – Chlamydial infection, unspecifiedBillable

Frequently asked questions

What is ICD-10 code A74.8?

A74.8 is the ICD-10-CM code for other chlamydial diseases, in the block A70-A74 (Other diseases caused by chlamydiae).

Is A74.8 a billable code?

No. A74.8 is a header code with more specific child codes; report one of the billable codes listed above.

What category does A74.8 belong to?

It belongs to category A74 – Other diseases caused by chlamydiae.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.