ICD-10-CM 2027
ICD-10 code for arteritis neurosyphilis
From the official ICD-10-CM alphabetic index entry “Neurosyphilis (arrested) (early) (gumma) (late) (latent) (recurrent) (relapse) › arteritis (any artery) (cerebral)”. Page updated September 29, 2026.
About coding arteritis neurosyphilis
The ICD-10-CM code for arteritis neurosyphilis is A52.04 (Syphilitic cerebral arteritis).
Within A52.0 (cardiovascular and cerebrovascular syphilis), A52.04 is specifically for syphilitic cerebral arteritis. Related codes cover cardiovascular syphilis, unspecified (A52.00), syphilitic aneurysm of aorta (A52.01), syphilitic aortitis (A52.02), syphilitic endocarditis (A52.03), other cerebrovascular syphilis (A52.05), other syphilitic heart involvement (A52.06) and other cardiovascular syphilis (A52.09).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 314 (Other Circulatory System Diagnoses with MCC, relative weight 2.0873), DRG 315 (Other Circulatory System Diagnoses with CC, relative weight 0.9508) and DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about arteritis neurosyphilis ICD-10 codes
What is the ICD-10 code for arteritis neurosyphilis?
- A52.04 — Syphilitic cerebral arteritis.
Is A52.04 billable?
- Yes. A52.04 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A52.04 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A52.04 as a principal diagnosis.
Is A52.04 a CC or MCC?
- A52.04 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.