M05.561 Rheumatoid polyneuropathy with rheumatoid arthritis of right knee

Billable ICD-10-CM code, FY2026.

Applies from M05 Rheumatoid arthritis with rheumatoid factor

Excludes1 (never code together)

• rheumatic fever (I00)
• juvenile rheumatoid arthritis (M08.-)
• rheumatoid arthritis of spine (M45.-)

Risk adjustment (HCC)

• CMS-HCC V22: HCC 75 — Myasthenia Gravis/Myoneural Disorders, Inflammatory and Toxic Neuropathy
• RxHCC V08: HCC 158 — Inflammatory and Toxic Neuropathy
• ESRD V24: HCC 75

MS-DRG index

Defines the logic of DRG(s) 545-547 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 357.1 Polyneuropathy in collagen vascular disease (approximate)
• 714.0 Rheumatoid arthritis (approximate)

Code annotations containing back-references to M05.561

Back-references to M05.5

• Type 1 Excludes: G63 Polyneuropathy in diseases classified elsewhere ("rheumatoid arthritis (M05.5-)")

Back-references to M05

• Code Also: I27.21 Secondary pulmonary arterial hypertension ("rheumatoid arthritis (M05.-)")
• Type 1 Excludes: R76.81 Abnormal rheumatoid factor and anti-citrullinated protein antibody without rheumatoid arthritis ("rheumatoid arthritis with rheumatoid factor (M05.-)")

Nearby codes

• M05.55 Rheumatoid polyneuropathy with rheumatoid arthritis of hip
• M05.551 Rheumatoid polyneuropathy with rheumatoid arthritis of right hip
• M05.552 Rheumatoid polyneuropathy with rheumatoid arthritis of left hip
• M05.559 Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified hip
• M05.56 Rheumatoid polyneuropathy with rheumatoid arthritis of knee
• M05.561 Rheumatoid polyneuropathy with rheumatoid arthritis of right knee (this code)
• M05.562 Rheumatoid polyneuropathy with rheumatoid arthritis of left knee
• M05.569 Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified knee
• M05.57 Rheumatoid polyneuropathy with rheumatoid arthritis of ankle and foot
• M05.571 Rheumatoid polyneuropathy with rheumatoid arthritis of right ankle and foot
• M05.572 Rheumatoid polyneuropathy with rheumatoid arthritis of left ankle and foot