M05
ICD-10Non-billable categoryRheumatoid arthritis with rheumatoid factor
Official ICD-10-CM descriptor (FY2026)
Rheumatoid arthritis with rheumatoid factor
M05 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- rheumatic fever (I00)
- juvenile rheumatoid arthritis (M08.-)
- rheumatoid arthritis of spine (M45.-)
More specific codes under M05
- M05.0Felty's syndromecategory
- M05.1Rheumatoid lung disease with rheumatoid arthritiscategory
- M05.2Rheumatoid vasculitis with rheumatoid arthritiscategory
- M05.3Rheumatoid heart disease with rheumatoid arthritiscategory
- M05.4Rheumatoid myopathy with rheumatoid arthritiscategory
- M05.5Rheumatoid polyneuropathy with rheumatoid arthritiscategory
- M05.6Rheumatoid arthritis w involvement of oth organs and systemscategory
- M05.7Rheumatoid arthritis w rheumatoid factor w/o org/sys involvcategory
- M05.8Other rheumatoid arthritis with rheumatoid factorcategory
- M05.9Rheumatoid arthritis with rheumatoid factor, unspecified
- M05.AAbn rheu fctr & anti-citrul protein antibody w rheu arthrit
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.