Diagnosis Code


Code Information

Diagnosis Code: A53.9

Short Description: Syphilis, unspecified

Long Description: Syphilis, unspecified

The code A53.9 is VALID for claim submission

Code Classification:

  • Certain infectious and parasitic diseases (A00–B99)
    • Infections with a predominantly sexual mode of transmission (A50-A64)
      • Other and unspecified syphilis (A53)
        • A53.9 Syphilis, unspecified

Code Version: 2020 ICD-10-CM


  • Acquired syphilis
  • Anetoderma secondary to syphilis
  • Gingival disease caused by Treponema pallidum
  • Gingival disease due to bacteria
  • Maternal syphilis during pregnancy, childbirth and the puerperium
  • Syphilis
  • Syphilis in mother complicating childbirth
  • Syphilis test finding
  • Treponema pallidum ELISA positive

Diagnostic Related Group(s)

The code A53.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v37.0)
  • Other Infectious And Parasitic Diseases Diagnoses With Mcc (867)
  • Other Infectious And Parasitic Diseases Diagnoses With Cc (868)
  • Other Infectious And Parasitic Diseases Diagnoses Without Cc/mcc (869)

References to Index of Diseases and Injuries

The code A53.9 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Infection due to Treponema pallidum NOS
    • Syphilis (acquired) NOS
  • Type 1 Excludes Notes:
    • syphilis NOS under two years of age (@A50.2*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
A53.9 Right Arrow 097.9 Syphilis NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
A53 Other and unspecified syphilis
A53.0 Latent syphilis, unspecified as early or late

This page was last updated on: 10/1/2020