ICD-10-CM > M00-M99 > M05-M14 > M05 > M05.6 > M05.64 M05.64 Rheumatoid arthritis of hand with involvement of other organs and systems Non-Billable/Non-Specific Applicable To Rheumatoid arthritis of metacarpus and phalanges with involvement of other organs and systems Codes M05.641Rheumatoid arthritis of right hand with involvement of other organs and systemsM05.642Rheumatoid arthritis of left hand with involvement of other organs and systemsM05.649Rheumatoid arthritis of unspecified hand with involvement of other organs and systems