2026 ICD-10-CM Diagnosis Code A52.06Other syphilitic heart involvement
ICD-10-CM Codes›A00–B99›A50-A64›A52
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
A52.06 is a billable ICD-10-CM diagnosis code for other syphilitic heart involvement. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 96 closely related codes. Coders also document this condition as acute bacterial pericarditis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Endocarditis and endocardial disease and Sexually transmitted infections (excluding HIV and hepatitis).
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute bacterial pericarditis
- Acute syphilitic pericarditis
- Syphilitic coronary artery disease
- Syphilitic ostial coronary disease
- Syphilitic pericarditis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Syphilitic coronary artery disease
- Syphilitic myocarditis
- Syphilitic pericarditis
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
syphilitic A52.06
coronary A52.06
Disease, diseased See Also: Syndrome;
syphilitic A52.06
heart A52.06
myocardium A52.06
pericardium A52.06
myocardial, myocardium (with arteriosclerosis) See Also: Failure, heart; I50.9
syphilitic A52.06
Myocarditis (with arteriosclerosis) (chronic) (fibroid) (interstitial) (old) (progressive) (senile) I51.4
syphilitic (chronic) A52.06
Narrowing See Also: Stenosis;
coronary See Also: Disease, heart, ischemic, atherosclerotic;
due to syphilis NEC A52.06
Syphilis, syphilitic (acquired) A53.9
auricular fibrillation A52.06
cardiac decompensation A52.06
myocardium A52.06
paroxysmal tachycardia A52.06
pericardium A52.06
coronary A52.06
tachycardia A52.06
Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) I82.90
mural See Also: Infarct, myocardium;
due to syphilis A52.06
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Heart Diseases
Heart disease is a general term that includes many types of heart problems. It's a type of cardiovascular disease, which means heart and blood vessel disease.
The full article covers:
- What is heart disease?
- What are the types of heart disease?
- What causes heart diseases?
- Who is more likely to develop heart diseases?
- What are the symptoms of heart disease?
- How are heart diseases diagnosed?
- What are the treatments for heart disease?
- Can heart diseases be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A52.06 to ICD-9-CMHistory
Code HistoryHistory
Questions About A52.06Overview
What is the ICD-10 code for other syphilitic heart involvement?
The ICD-10-CM code for other syphilitic heart involvement is A52.06 (sometimes written as A5206). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is A52.06 (Cardiovascular and cerebrovascular syphilis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other syphilitic heart involvement on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does A52.06 group to?
When other syphilitic heart involvement is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.
Is A52.06 a CC or MCC?
CMS lists A52.06 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 96 closely related codes in its exclusion list.
What is the ICD-9 equivalent of A52.06?
Under the General Equivalence Mappings, other syphilitic heart involvement converts to ICD-9-CM 093.81 (syphilitic pericarditis) and 093.82 (syphilitic myocarditis). The mapping is approximate, so confirm the match fits the documentation.
