M05.561 — Rheumatoid polyneuropathy with rheumatoid arthritis of right knee
M05.561 is a billable, specific ICD-10-CM code for rheumatoid polyneuropathy with rheumatoid arthritis of right knee. It is valid for submission on a claim.
Excludes1 inherited from the categories above M05.561
These are not written on M05.561, but they bind it: a note on a category applies to every code beneath it. Billing M05.561 with anything listed here is a denial.
Other codes that can never be billed with M05.561
These codes carry an Excludes1 note pointing at M05.561. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M05.561 alone.
- R76.81Abnormal rheumatoid factor and anti-citrullinated protein antibody without rheumatoid arthritis
Risk adjustment
M05.561 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
M05.561 is named in 52 Medicare coverage policies — 42 listing it as supporting medical necessity, and 10 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56731Billing and Coding: Nerve Blocks and Electrostimulation for Peripheral Neuropathynot covered
- A57589Billing and Coding: Nerve Blocks for Peripheral Neuropathynot covered
- A57663Billing and Coding: Nerve Blocks for Peripheral Neuropathynot covered
- A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
Code history
M05.561 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share M05.56. If M05.561 is not quite right, the correct code is usually one of these.
Questions about M05.561
- Is M05.561 a billable ICD-10-CM code?
- Yes. M05.561 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does M05.561 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).
- What cannot be coded together with M05.561?
- M05.561 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M05.561 (M05) and apply to it just the same.