Other rheumatoid arthritis
Other rheumatoid arthritis
M06 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.
M06.1 identifies adult-onset Still's disease (AOSD), a systemic inflammatory condition characterized by quotidian spiking fevers, evanescent salmon-colored rash, polyarthritis, and systemic involvement including lymphadenopathy and hepatosplenomegaly — distinguished from classical rheumatoid arthritis by its acute febrile systemic onset.
M06.4 classifies inflammatory polyarthropathy — an inflammatory arthritis affecting multiple joints — where documentation does not specify rheumatoid factor status or a more definitive diagnosis within the M05–M06 category.
M06.9 identifies rheumatoid arthritis where the clinical documentation does not specify joint location, rheumatoid factor status, or a recognized subtype — making it the catch-all code within the M06 category when more granular detail is absent.