All ICD10 Codes

M05

Non-Billable
ChapterM00–M99
Rankcategory
Official Description

Rheumatoid arthritis with rheumatoid factor

Use a more specific code (2 billable, 9 non-billable)
M05.0Felty's syndromehas subcodesM05.1Rheumatoid lung disease with rheumatoid arthritishas subcodesM05.2Rheumatoid vasculitis with rheumatoid arthritishas subcodesM05.3Rheumatoid heart disease with rheumatoid arthritishas subcodesM05.4Rheumatoid myopathy with rheumatoid arthritishas subcodesM05.5Rheumatoid polyneuropathy with rheumatoid arthritishas subcodesM05.6Rheumatoid arthritis with involvement of other organs and systemshas subcodesM05.7Rheumatoid arthritis with rheumatoid factor without organ or systems involvementhas subcodesM05.8Other rheumatoid arthritis with rheumatoid factorhas subcodesM05.9Rheumatoid arthritis with rheumatoid factor, unspecifiedM05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

CH13 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • rheumatic fever (I00)
  • juvenile rheumatoid arthritis (M08.-)
  • rheumatoid arthritis of spine (M45.-)

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M05-M14Inflammatory polyarthropathies (M05-M14)
M05Rheumatoid arthritis with rheumatoid factorNot billable
M05.0Felty's syndromeSubcodes
M05.1Rheumatoid lung disease with rheumatoid arthritisSubcodes
M05.2Rheumatoid vasculitis with rheumatoid arthritisSubcodes
M05.3Rheumatoid heart disease with rheumatoid arthritisSubcodes
M05.4Rheumatoid myopathy with rheumatoid arthritisSubcodes
M05.5Rheumatoid polyneuropathy with rheumatoid arthritisSubcodes
M05.6Rheumatoid arthritis with involvement of other organs and systemsSubcodes
M05.7Rheumatoid arthritis with rheumatoid factor without organ or systems involvementSubcodes
M05.8Other rheumatoid arthritis with rheumatoid factorSubcodes
M05.9Rheumatoid arthritis with rheumatoid factor, unspecifiedBillable
M05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritisBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M05:

chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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