A52.3

Neurosyphilis, unspecified

Billable FY2026 2025-10-01 → 2026-09-30

This is the unspecified option. 6 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.

Exclusions 8 never code together

A50-A64block

Excludes1

nonspecific and nongonococcal urethritis (N34.1)N34.1
Reiter's disease (M02.3-)M02.3-

Excludes2

human immunodeficiency virus [HIV] disease (B20)B20

A00-B99chapter

Excludes1

certain localized infections - see body system-related chapters

Excludes2

carrier or suspected carrier of infectious disease (Z22.-)Z22.-
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 5

A52.3code

Inclusion terms

Gumma (syphilitic)
Syphilis (late)
Syphiloma

A00-B99chapter

Includes

diseases generally recognized as communicable or transmissible

Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)Z16.-

Index entries leading here 4

Syphiloma A52.79
- central nervous system A52.3
Syphilis, syphilitic (acquired) A53.9
- early A51.9
  - central nervous system A52.3
- gumma NEC A52.79
  - central nervous system A52.3
- late A52.9
  - central nervous system A52.3
- primary A51.0
  - central nervous system A52.3
- tertiary A52.9
  - central nervous system A52.3
- central nervous system (late) (recurrent) (relapse) (tertiary) A52.3
  - remission in (sustained) A52.3
  - serology doubtful, negative, or positive A52.3
- nervous system, central A52.3
Gumma (syphilitic) A52.79
- central nervous system A52.3
- neurosyphilitic A52.3
Neurosyphilis (arrested) (early) (gumma) (late) (latent) (recurrent) (relapse) A52.3
- remission in (sustained) A52.3

Alongside this code 6 same parent — A52

A52.0 Cardiovascular and cerebrovascular syphilis category A52.1 Symptomatic neurosyphilis category A52.2 Asymptomatic neurosyphilis A52.7 Other symptomatic late syphilis category A52.8 Late syphilis, latent A52.9 Late syphilis, unspecified

Medications 1

1 Neurosyphilis drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: A52
Block: A50-A64
Siblings: 6

Present FY2024–FY2027.