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ICD-10-CM Codes
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A00-B99
Certain infectious and parasitic diseases
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A50-A64
Infections with a predominantly sexual mode of transmission
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A51-
Early syphilis
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2018 ICD-10-CM Diagnosis Code A51
Early syphilis
2016 2017 2018 Non-Billable/Non-Specific Code
- A51 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2018 edition of ICD-10-CM A51 became effective on October 1, 2017.
- This is the American ICD-10-CM version of A51 - other international versions of ICD-10 A51 may differ.
The following code(s) above
A51 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
A51:
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
ICD-10-CM Codes Adjacent To A51
A50.54 Late congenital cardiovascular syphilis
A50.55 Late congenital syphilitic arthropathy
A50.56 Late congenital syphilitic osteochondropathy
A50.59 Other late congenital syphilis, symptomatic
A50.6 Late congenital syphilis, latent
A50.7 Late congenital syphilis, unspecified
A50.9 Congenital syphilis, unspecified
A51
Early syphilis
A51.0 Primary genital syphilis
A51.1 Primary anal syphilis
A51.2 Primary syphilis of other sites
A51.3 Secondary syphilis of skin and mucous membranes
A51.39 Other secondary syphilis of skin
A51.4 Other secondary syphilis
A51.41 Secondary syphilitic meningitis
A51.42 Secondary syphilitic female pelvic disease
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
