| M02362 | Reiter's disease, left knee |
| M02369 | Reiter's disease, unspecified knee |
| M0237 | Reiter's disease, ankle and foot |
| M02371 | Reiter's disease, right ankle and foot |
| M02372 | Reiter's disease, left ankle and foot |
| M02379 | Reiter's disease, unspecified ankle and foot |
| M0238 | Reiter's disease, vertebrae |
| M0239 | Reiter's disease, multiple sites |
| M028 | Other reactive arthropathies |
| M0280 | Other reactive arthropathies, unspecified site |
| M0281 | Other reactive arthropathies, shoulder |
| M02811 | Other reactive arthropathies, right shoulder |
| M02812 | Other reactive arthropathies, left shoulder |
| M02819 | Other reactive arthropathies, unspecified shoulder |
| M0282 | Other reactive arthropathies, elbow |
| M02821 | Other reactive arthropathies, right elbow |
| M02822 | Other reactive arthropathies, left elbow |
| M02829 | Other reactive arthropathies, unspecified elbow |
| M0283 | Other reactive arthropathies, wrist |
| M02831 | Other reactive arthropathies, right wrist |
| M02832 | Other reactive arthropathies, left wrist |
| M02839 | Other reactive arthropathies, unspecified wrist |
| M0284 | Other reactive arthropathies, hand |
| M02841 | Other reactive arthropathies, right hand |
| M02842 | Other reactive arthropathies, left hand |
| M02849 | Other reactive arthropathies, unspecified hand |
| M0285 | Other reactive arthropathies, hip |
| M02851 | Other reactive arthropathies, right hip |
| M02852 | Other reactive arthropathies, left hip |
| M02859 | Other reactive arthropathies, unspecified hip |
| M0286 | Other reactive arthropathies, knee |
| M02861 | Other reactive arthropathies, right knee |
| M02862 | Other reactive arthropathies, left knee |
| M02869 | Other reactive arthropathies, unspecified knee |
| M0287 | Other reactive arthropathies, ankle and foot |
| M02871 | Other reactive arthropathies, right ankle and foot |
| M02872 | Other reactive arthropathies, left ankle and foot |
| M02879 | Other reactive arthropathies, unspecified ankle and foot |
| M0288 | Other reactive arthropathies, vertebrae |
| M0289 | Other reactive arthropathies, multiple sites |
| M029 | Reactive arthropathy, unspecified |
| M04 | Autoinflammatory syndromes |
| M041 | Periodic fever syndromes |
| M042 | Cryopyrin-associated periodic syndromes |
| M048 | Other autoinflammatory syndromes |
| M049 | Autoinflammatory syndrome, unspecified |
| M05 | Rheumatoid arthritis with rheumatoid factor |
| M050 | Felty's syndrome |
| M0500 | Felty's syndrome, unspecified site |
| M0501 | Felty's syndrome, shoulder |