M05 ICD-10-CM Code: Rheumatoid arthritis with rheumatoid factor
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
M05Rheumatoid arthritis with rheumatoid factor
ICD-10-CM diagnosis code · United States clinical modification
Where M05 sits
- 1
Chapter 13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2
Section
Inflammatory polyarthropathies (M05-M14)
- 3
Category M05
Rheumatoid arthritis with rheumatoid factor
- 4
Code M05
Rheumatoid arthritis with rheumatoid factor
Codes under M05
M05 is a non-billable category. Choose the child code that best matches the documented diagnosis.
M05.0Felty's syndromeM05.1Rheumatoid lung disease with rheumatoid arthritisM05.2Rheumatoid vasculitis with rheumatoid arthritisM05.3Rheumatoid heart disease with rheumatoid arthritisM05.4Rheumatoid myopathy with rheumatoid arthritisM05.5Rheumatoid polyneuropathy with rheumatoid arthritisM05.6Rheumatoid arthritis with involvement of other organs and systemsM05.7Rheumatoid arthritis with rheumatoid factor without organ or systems involvementM05.8Other rheumatoid arthritis with rheumatoid factorM05.9Rheumatoid arthritis with rheumatoid factor, unspecifiedM05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritisNotes for this code
Inclusion terms
No inclusion terms are listed for M05.
Code first
No “code first” instruction is listed for M05.
Use additional code
No “use additional code” instruction is listed for M05.
Excludes1
Conditions that should not be reported together with this code.
- rheumatic fever (I00)
- juvenile rheumatoid arthritis (M08.-)
- rheumatoid arthritis of spine (M45.-)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for M05.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code M05 mean?
M05 is the FY 2027 U.S. ICD-10-CM code for “Rheumatoid arthritis with rheumatoid factor.”
Is M05 a billable or specific ICD-10-CM code?
No. M05 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is M05 located in ICD-10-CM?
M05 is listed in Chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99), within Inflammatory polyarthropathies (M05-M14) (M05–M14), under category M05, Rheumatoid arthritis with rheumatoid factor.
What coding notes are listed for M05?
No inclusion terms are listed for M05 in this reference record. No code-first instruction is listed. Excludes1 notes: rheumatic fever (I00); juvenile rheumatoid arthritis (M08.-); rheumatoid arthritis of spine (M45.-). No Excludes2 note is listed.