A51.0
Billable codePrimary genital syphilis
The ICD-10 code for primary genital syphilis is A51.0.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Syphilitic chancre NOS
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 0910
Associated MS-DRGs
A51.0 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 727Inflammation of the Male Reproductive System with MCC
- DRG 728Inflammation of the Male Reproductive System without MCC
- DRG 729Other Male Reproductive System Diagnoses with CC/MCC
- DRG 730Other Male Reproductive System Diagnoses without CC/MCC
- DRG 742Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC
- DRG 743Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC
- DRG 757Infections, Female Reproductive System with MCC
- DRG 758Infections, Female Reproductive System with CC
- DRG 759Infections, Female Reproductive System without CC/MCC