ICD-10-CM 2027
ICD-10 code for venereal disease
From the official ICD-10-CM alphabetic index entry “Disease, diseased › venereal”. Page updated September 29, 2026.
About coding venereal disease
The ICD-10-CM code for venereal disease is A64 (Unspecified sexually transmitted disease). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A64.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 727 (Inflammation of the Male Reproductive System with MCC, relative weight 1.37), DRG 728 (Inflammation of the Male Reproductive System without MCC, relative weight 0.8224), DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 757 (Infections, Female Reproductive System with MCC, relative weight 1.4649), DRG 758 (Infections, Female Reproductive System with CC, relative weight 0.9908) and 1 more, in MDC 12 (Diseases and Disorders of the Male Reproductive System) and MDC 13 (Diseases and Disorders of the Female Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific venereal disease codes (official index)
- chlamydial NEC A56.8 — Sexually transmitted chlamydial infection of other sites
- anus A56.3 — Chlamydial infection of anus and rectum
- genitourinary NOS A56.2 — Chlamydial infection of genitourinary tract, unspecified
- pharynx A56.4 — Chlamydial infection of pharynx
- rectum A56.3 — Chlamydial infection of anus and rectum
- fifth A55 — Chlamydial lymphogranuloma (venereum)
- sixth A55 — Chlamydial lymphogranuloma (venereum)
- specified nature or type NEC A63.8 — Other specified predominantly sexually transmitted diseases
Common questions about venereal disease ICD-10 codes
What is the ICD-10 code for venereal disease?
- A64 — Unspecified sexually transmitted disease. More specific codes apply when the documentation supports them: A56.8, A56.3, A56.2, A56.4 and others below.
What is the ICD-10 code for chlamydial nec venereal disease?
- A56.8 — Sexually transmitted chlamydial infection of other sites.
What is the ICD-10 code for fifth venereal disease?
- A55 — Chlamydial lymphogranuloma (venereum).
What is the ICD-10 code for sixth venereal disease?
- A55 — Chlamydial lymphogranuloma (venereum).
Is A64 billable?
- Yes. A64 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A64 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A64 as a principal diagnosis.
Is A64 a CC or MCC?
- No. A64 is neither a CC nor an MCC under MS-DRG v44.0.