M12.09 — Chronic postrheumatic arthropathy [Jaccoud], multiple sites
M12.09 is a billable, specific ICD-10-CM code for chronic postrheumatic arthropathy [jaccoud], multiple sites. It is valid for submission on a claim.
Risk adjustment
M12.09 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 94 Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders0.268 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
M12.09 is named in 16 Medicare coverage policies — 10 listing it as supporting medical necessity, and 6 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A59434Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
How M12.09 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 M12.09.
- Arthropathy›postrheumatic, chronic›multiple site
Related codes at this level
Codes that share M12.0. If M12.09 is not quite right, the correct code is usually one of these.
- M12.00Chronic postrheumatic arthropathy [Jaccoud], unspecified site
- M12.01Chronic postrheumatic arthropathy [Jaccoud], shoulder
- M12.02Chronic postrheumatic arthropathy [Jaccoud], elbow
- M12.03Chronic postrheumatic arthropathy [Jaccoud], wrist
- M12.04Chronic postrheumatic arthropathy [Jaccoud], hand
- M12.05Chronic postrheumatic arthropathy [Jaccoud], hip
- M12.06Chronic postrheumatic arthropathy [Jaccoud], knee
- M12.07Chronic postrheumatic arthropathy [Jaccoud], ankle and foot
- M12.08Chronic postrheumatic arthropathy [Jaccoud], other specified site
Questions about M12.09
- Is M12.09 a billable ICD-10-CM code?
- Yes. M12.09 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does M12.09 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).