ICD-10-CM > M00-M99 > M05-M14 > M05 > M05.8 > M05.85 M05.85 Other rheumatoid arthritis with rheumatoid factor of hip Non-Billable/Non-Specific Codes M05.851Other rheumatoid arthritis with rheumatoid factor of right hipM05.852Other rheumatoid arthritis with rheumatoid factor of left hipM05.859Other rheumatoid arthritis with rheumatoid factor of unspecified hip