M05

Non-billable

Rheumatoid arthritis with rheumatoid factor

M05 is the ICD-10-CM code for Rheumatoid arthritis with rheumatoid factor. It is a non-billable category code — use a more specific child code such as M05.0 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Subcodes
11
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code M05?
M05 is the ICD-10-CM code for "Rheumatoid arthritis with rheumatoid factor". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M05 a billable code?
No — M05 is a non-billable header code. Use a more specific child code (such as M05.0) for billing.
What are the subcodes of M05?
M05 has 11 more specific child codes, including M05.0, M05.1, M05.2.
What is excluded from M05?
Excludes1 (not coded here): rheumatic fever (I00); juvenile rheumatoid arthritis (M08.-); rheumatoid arthritis of spine (M45.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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