A52.77 — Syphilis of bone and joint
A52.77 is a billable, specific ICD-10-CM code for syphilis of bone and joint. It is valid for submission on a claim.
Other codes that can never be billed with A52.77
These codes carry an Excludes1 note pointing at A52.77. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A52.77 alone.
Risk adjustment
A52.77 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How A52.77 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A52.77.
- Caries›syphilitic
- Dactylitis›syphilitic
- Exostosis›syphilitic
- Gout, chronic›syphilitic
- Gout, gouty›syphilitic
- Gumma›bone
- Hydrarthrosis›syphilitic(late)
- Osteomyelitis›syphilitic
- Periostitis›syphilitic
- Syphilis, syphilitic›bone
- Syphilis, syphilitic›destruction of bone
- Syphilis, syphilitic›fracture
Related codes at this level
Codes that share A52.7. If A52.77 is not quite right, the correct code is usually one of these.
- A52.71Late syphilitic oculopathy
- A52.72Syphilis of lung and bronchus
- A52.73Symptomatic late syphilis of other respiratory organs
- A52.74Syphilis of liver and other viscera
- A52.75Syphilis of kidney and ureter
- A52.76Other genitourinary symptomatic late syphilis
- A52.78Syphilis of other musculoskeletal tissue
- A52.79Other symptomatic late syphilis
Questions about A52.77
- Is A52.77 a billable ICD-10-CM code?
- Yes. A52.77 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A52.77 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Infections with a predominantly sexual mode of transmission (A50-A64).