ICD-10 Code A63.8 – Other specified predominantly sexually transmitted diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A63.8 – Other specified predominantly sexually transmitted diseases
What it is
This code identifies a sexually transmitted disease that is documented, but does not fit a more specific ICD-10 category. Use it for named conditions under the “other specified” umbrella when the record supports that diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect a recognized sexually transmitted infection or related genital, mucosal, or systemic manifestations, but the chart must support the specific condition being coded.
When to use this code
Use A63.8 when the provider documents a predominantly sexually transmitted disease that is not indexed to a more specific code. It is appropriate when the diagnosis is established, but the exact STD category is not separately listed in ICD-10-CM. Check documentation if the note is vague or only describes exposure.
Do not use for
Do not use this code for unspecified symptoms, screening, or suspected exposure without a confirmed diagnosis. If the record names a different, more specific sexually transmitted infection, code that condition instead.
Coding tip
Code the most specific documented STD first; reserve A63.8 for cases that are clearly identified but not otherwise classifiable.