B39.9 — Histoplasmosis, unspecified
B39.9 is a billable, specific ICD-10-CM code for histoplasmosis, unspecified. It is valid for submission on a claim.
Risk adjustment
B39.9 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.
Medicare coverage
B39.9 is named in 11 Medicare coverage policies — 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53008Billing and Coding: Intraocular Bevacizumab
- A56416Billing and Coding: Assays for Vitamins and Metabolic Function
- A56537Billing and Coding: Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI)
- A56692Billing and Coding: Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI)
How B39.9 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 B39.9.
- Histoplasmosis
- Chorioretinitis›histoplasmic
- Chorioretinitis›in›histoplasmosis
Related codes at this level
Codes that share B39. If B39.9 is not quite right, the correct code is usually one of these.
Questions about B39.9
- Is B39.9 a billable ICD-10-CM code?
- Yes. B39.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does B39.9 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).