A51.2
Primary syphilis of other sites
Billable code
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
Inherited from A50-A64Infections with a predominantly sexual mode of transmission
Inherited from chapter 1Certain infectious and parasitic diseases
Includes
diseases generally recognized as communicable or transmissible
Excludes 1
certain localized infections - see body system-related chapters
Excludes 2
carrier or suspected carrier of infectious disease (Z22.-) infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) infectious and parasitic diseases specific to the perinatal period (P35-P39) influenza and other acute respiratory infections (J00-J22)
Use additional
code to identify resistance to antimicrobial drugs (Z16.-)
Official Guidelines for A51.2
FY 2026 ›I.C.1Chapter-specific guidanceChapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9
Subsections
- I.C.1.aHuman Immunodeficiency Virus (HIV) Infections
- I.C.1.bInfectious agents as the cause of diseases classified to other chapters
- I.C.1.cInfections resistant to antibiotics
- I.C.1.dSepsis, Severe Sepsis, and Septic Shock Infections resistant to antibiotics
- I.C.1.eMethicillin Resistant Staphylococcus aureus (MRSA) Conditions
- I.C.1.fZika virus infections
- I.C.1.gCoronavirus infections
Find A51.2 in the alphabetic index
18 index paths lead to this code
- Chancre › conjunctiva NEC
- Chancre › extragenital
- Chancre › eyelid
- Chancre › lip
- Chancre › nipple
- Chancre › palate, soft
- Chancre › soft › palate
- Induration, indurated › chancre › extragenital NEC
- Syphilis, syphilitic › chancre › extragenital
- Syphilis, syphilitic › lip › chancre
- Syphilis, syphilitic › primary › extragenital chancre NEC
- Syphilis, syphilitic › primary › fingers
- Syphilis, syphilitic › primary › lip
- Syphilis, syphilitic › primary › specified site NEC
- Syphilis, syphilitic › primary › tonsils
- Syphilis, syphilitic › tonsil › primary
- Ulcus › durum › extragenital
- Syphilis, syphilitic › early › symptomatic › extragenital chancre