ICD-10-CM > M00-M99 > M05-M14 > M08 > M08.4 > M08.42 M08.42 Pauciarticular juvenile rheumatoid arthritis, elbow Non-Billable/Non-Specific Codes M08.421Pauciarticular juvenile rheumatoid arthritis, right elbowM08.422Pauciarticular juvenile rheumatoid arthritis, left elbowM08.429Pauciarticular juvenile rheumatoid arthritis, unspecified elbow