A53Header code — not billable
Other and unspecified syphilis
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- A53
- Effective date
- October 1, 2026
Related codes in category A53
Frequently asked questions
What is ICD-10 code A53?
A53 is an ICD-10-CM diagnosis code for Other and unspecified syphilis.
Is A53 a billable code?
No. A53 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is A53 in?
A53 falls under Chapter 1: Certain infectious and parasitic diseases.
When did A53 become effective?
A53 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to A53?
A53 belongs to category A53, which includes 2 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.