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A51 Early syphilis

ICD-10-CM category A51 sits in Chapter 1 (Certain infectious and parasitic diseases, A00-B99). It contains 15 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

A51.3 Secondary syphilis of skin and mucous membranesA51.4 Other secondary syphilis

Billable codes in A51

CodeDescription
A51.0Primary genital syphilis
A51.1Primary anal syphilis
A51.2Primary syphilis of other sites
A51.31Condyloma latum
A51.32Syphilitic alopecia
A51.39Other secondary syphilis of skin
A51.41Secondary syphilitic meningitis
A51.42Secondary syphilitic female pelvic disease
A51.43Secondary syphilitic oculopathy
A51.44Secondary syphilitic nephritis
A51.45Secondary syphilitic hepatitis
A51.46Secondary syphilitic osteopathy
A51.49Other secondary syphilitic conditions
A51.5Early syphilis, latent
A51.9Early syphilis, unspecified

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