A51.0
BillablePrimary genital syphilis
Primary genital syphilis
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Syphilitic chancre NOS
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •nonspecific and nongonococcal urethritisN34.1
- •Reiter's diseaseM02.3
Excludes 2
Conditions not included here, but the patient may have both
- •carrier or suspected carrier of infectious diseaseZ22
- •infectious and parasitic diseases complicating pregnancy, childbirth and the puerperiumO98
- •infectious and parasitic diseases specific to the perinatal periodP35-P39
- •influenza and other acute respiratory infectionsJ00-J22
- •human immunodeficiency virus [HIV] diseaseB20
Use Additional Code
Additional codes that should follow this code
Related Codes(6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(43)
SNOMED CT
- Genital chancre186847001
- Primary genital syphilis186847001
- Bacterial balanitis236745001
- Primary syphilis266127002
- Infective dermatosis of female genitalia402706007
- Syphilitic chancre of penis402940004
- Syphilitic chancre of vulva402941000
- Syphilitic balanitis402943002
- Chancre caused by Treponema pallidum736686006
- Syphilitic chancre736686006
UMLS
- ChancreC0007939
- Chancre caused by Treponema pallidumC0007939
- Chancre caused by Treponema pallidum (disorder)C0007939
- Syphilitic chancreC0007939
- Syphilitic chancre NOSC0007939
- chancreC0007939
- chancre syphiliticC0007939
- chancresC0007939
- primary syphilisC0007939
- syphilis primaryC0007939
- Genital chancreC0017418
- Genital syphilis (primary)C0017418
- Primary genital syphilisC0017418
- Primary genital syphilis (disorder)C0017418
- Syphilis genitalC0017418
Clinical Terms
- Primary genital syphilis (disorder)
- Primary syphilis
- Syphilitic chancre of vulva
- Genital chancre
- Genital syphilis (primary)
- Chancre caused by Treponema pallidum (disorder)
- chancre
- Syphilitic chancre
- Syphilitic chancre NOS
- Syphilitic chancre of penis
- Bacterial balanitis
- chancre syphilitic
- chancres
- Infective dermatosis of female genitalia
- Chancre caused by Treponema pallidum
- Syphilis genital
- syphilis primary
- Syphilitic balanitis
Frequently Asked Questions
What is the ICD-10 code for primary genital syphilis?
The ICD-10-CM code for primary genital syphilis is A51.0. The full clinical description is "Primary genital syphilis". A51.0 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A51.0 mean?
ICD-10-CM code A51.0 represents “Primary genital syphilis”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A51.0 a billable code?
Yes, A51.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A51.0 in?
A51.0 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A51.0?
A51.0 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; nonspecific and nongonococcal urethritis (N34.1); Reiter's disease (M02.3-).
Are additional codes required with A51.0?
Yes, when using A51.0, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A51.0 map to?
A51.0 maps to 8 SNOMED CT concepts: 236745001, 736686006, 186847001, 402706007, 266127002, and 3 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A51.0?
A51.0 is linked to 2 UMLS Concept Unique Identifiers: C0007939, C0017418. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A51.0 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like primary genital syphilis affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A51.0?
A51.0 maps to the ICD-11 code: 1A61.0 (Primary genital syphilis).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.