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A51.5

Billable

Early syphilis, latent

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

This is a stage of syphilis where a person has been infected with the syphilis bacteria but shows no visible symptoms or signs of the disease. The infection is present in the body and can be detected through blood tests, but the person appears and feels healthy.

Coding Tips

  • •Ensure documentation clearly indicates the latent stage of early syphilis (typically within the first 2 years of infection) rather than late latent syphilis, as they have different codes
  • •Verify that serological test results confirming syphilis infection are present in the medical record, as latent syphilis is diagnosed through blood tests rather than clinical symptoms

Code Hierarchy

└A51Early syphilis└A51.5Early syphilis, latent
└A51.5Early syphilis, latent

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