A53.9
BillableSyphilis, unspecified
A53.9 is the ICD-10-CM code for Syphilis, unspecified. It is a billable, specific code valid for reimbursement.
A00-B99 Certain infectious and parasitic diseases
Includes
- •Infection due to Treponema pallidum NOS
- •Syphilis (acquired) NOS
Excludes1 — not coded here
- •syphilis NOS under two years of age (A50.2)
Frequently asked questions
- What is ICD-10 code A53.9?
- A53.9 is the ICD-10-CM code for "Syphilis, unspecified". It falls under A00-B99 Certain infectious and parasitic diseases.
- Is A53.9 a billable code?
- Yes — A53.9 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from A53.9?
- Excludes1 (not coded here): syphilis NOS under two years of age (A50.2).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition