When is ICD-10 code A63 used?

Doctors, hospitals, and insurers may use ICD-10 code A63 when recording other predominantly sexually transmitted diseases, not elsewhere classified in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code A63 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code A63: Other predominantly sexually transmitted diseases, not elsewhere classified

Name: ICD-10 Code A63: Other predominantly sexually transmitted diseases, not elsewhere classified
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:00:46.170Z

A63 is an ICD-10 diagnosis entry used to group records related to Other predominantly sexually transmitted diseases, not elsewhere classified. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

When is it used?

May be used when a clinician documents other predominantly sexually transmitted diseases, not elsewhere classified in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

1Certain infectious and parasitic diseases (A00-B99)

block

A50-A64Infections with a predominantly sexual mode of transmission

currentA50-A64

Official coding notes

Excludes2 (may code together if documented)

molluscum contagiosum (B08.1)
papilloma of cervix (D26.0)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

Infectious Disease SpecialistGeneral Physician

Sibling codes

A50Congenital syphilis A51Early syphilis A52Late syphilis A53Other and unspecified syphilis A54Gonococcal infection A55Chlamydial lymphogranuloma (venereum)billable A56Other sexually transmitted chlamydial diseases A57Chancroidbillable A58Granuloma inguinalebillable A59Trichomoniasis A60Anogenital herpesviral [herpes simplex] infections A64Unspecified sexually transmitted diseasebillable

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

A63

Replacement codes

A63.0 — Anogenital (venereal) wartsA63.8 — Other specified predominantly sexually transmitted diseases

Common synonyms

Other predominantly sexually transmitted diseases, not elsewhere classified

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.