M05.70 — Rheumatoid arthritis with rheumatoid factor of unspecified site without organ or systems involvement
M05.70 is a billable, specific ICD-10-CM code for rheumatoid arthritis with rheumatoid factor of unspecified site without organ or systems involvement. It is valid for submission on a claim.
Risk adjustment
M05.70 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 93 Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders0.617 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
M05.70 is named in 18 Medicare coverage policies — 12 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 M05.70 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 M05.70.
- Arthritis, arthritic›rheumatoid›seropositive›without organ involvement
Related codes at this level
Codes that share M05.7. If M05.70 is not quite right, the correct code is usually one of these.
- M05.71Rheumatoid arthritis with rheumatoid factor of shoulder without organ or systems involvement
- M05.72Rheumatoid arthritis with rheumatoid factor of elbow without organ or systems involvement
- M05.73Rheumatoid arthritis with rheumatoid factor of wrist without organ or systems involvement
- M05.74Rheumatoid arthritis with rheumatoid factor of hand without organ or systems involvement
- M05.75Rheumatoid arthritis with rheumatoid factor of hip without organ or systems involvement
- M05.76Rheumatoid arthritis with rheumatoid factor of knee without organ or systems involvement
- M05.77Rheumatoid arthritis with rheumatoid factor of ankle and foot without organ or systems involvement
- M05.79Rheumatoid arthritis with rheumatoid factor of multiple sites without organ or systems involvement
- M05.7ARheumatoid arthritis with rheumatoid factor of other specified site without organ or systems involvement
Questions about M05.70
- Is M05.70 a billable ICD-10-CM code?
- Yes. M05.70 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does M05.70 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).