A53.9 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Syphilis, unspecified.
Inclusion term
Infection due to Treponema pallidum NOS
Syphilis (acquired) NOS
Type 1 excludes
Syphilis NOS under two years of age (A50.2)
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code