ICD-10-CM 2027 diagnosis code
A52.1Symptomatic neurosyphilis
A52.1 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About A52.1
A52.1 is the ICD-10-CM diagnosis code for symptomatic neurosyphilis. It belongs to category A52 (late syphilis), block A50-A64 (infections with a predominantly sexual mode of transmission) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.
Within A52 (late syphilis), A52.1 is specifically for symptomatic neurosyphilis. Related codes cover cardiovascular and cerebrovascular syphilis (A52.0), Asymptomatic neurosyphilis (A52.2), neurosyphilis, unspecified (A52.3), other symptomatic late syphilis (A52.7), latent (A52.8) and unspecified (A52.9).
To report this condition, pick the subcode that matches the documentation: A52.10 (unspecified), A52.11 (dorsalis), A52.12 (syphilis), A52.13 (meningitis), A52.14 (encephalitis), A52.15 (neuropathy), A52.16 ((tabetic)), A52.17 (paresis) and 1 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under A52.1
- A52.10Symptomatic neurosyphilis, unspecifiedBillable
- A52.11Tabes dorsalisBillable
- A52.12Other cerebrospinal syphilisBillable
- A52.13Late syphilitic meningitisBillable
- A52.14Late syphilitic encephalitisBillable
- A52.15Late syphilitic neuropathyBillable
- A52.16Charcot's arthropathy (tabetic)Billable
- A52.17General paresisBillable
- A52.19Other symptomatic neurosyphilisBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to A52.1.
Broader instructions also apply from A50-A64 Infections with a predominantly sexual mode of transmission and Chapter 1: Certain infectious and parasitic diseases.
Codes whose notes reference A52.1
- G99.8Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about A52.1
Is A52.1 billable?
- No. A52.1 is a header code. Report one of its more specific subcodes instead.