A53.9Billable

Syphilis, unspecified

Chapter
1. Certain infectious and parasitic diseases
Category
A53
Effective date
October 1, 2026

Related codes in category A53

A53Other and unspecified syphilisA53.0Latent syphilis, unspecified as early or lateYes

Frequently asked questions

What is ICD-10 code A53.9?

A53.9 is an ICD-10-CM diagnosis code for Syphilis, unspecified.

Is A53.9 a billable code?

Yes. A53.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is A53.9 in?

A53.9 falls under Chapter 1: Certain infectious and parasitic diseases.

When did A53.9 become effective?

A53.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to A53.9?

A53.9 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.