M05
Header — not billable
Rheumatoid arthritis with rheumatoid factor
Rheumatoid arthritis with rheumatoid factor
M05 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
M05.9
Rheumatoid arthritis with rheumatoid factor, unspecified
M05.A Seropositive rheumatoid arthritis confirmed by positive rheumatoid factor but with no further specification of joint site, laterality, or systemic organ involvement.
Abn rheu fctr & anti-citrul protein antibody w rheu arthrit
M05.A identifies rheumatoid arthritis in a patient with both a positive rheumatoid factor (RF) and positive anti-citrullinated protein antibody (ACPA/anti-CCP) on laboratory testing, representing dual-seropositive RA.
Inclusion & exclusion notes
Excludes 1 (mutually exclusive — never code together)
- rheumatic fever (I00)
- juvenile rheumatoid arthritis (M08.-)
- rheumatoid arthritis of spine (M45.-)