| M3214 | Glomerular disease in systemic lupus erythematosus |
| M3215 | Tubulo-interstitial nephropathy in systemic lupus erythematosus |
| M3219 | Other organ or system involvement in systemic lupus erythematosus |
| M328 | Other forms of systemic lupus erythematosus |
| M329 | Systemic lupus erythematosus, unspecified |
| M33 | Dermatopolymyositis |
| M330 | Juvenile dermatomyositis |
| M3300 | Juvenile dermatomyositis, organ involvement unspecified |
| M3301 | Juvenile dermatomyositis with respiratory involvement |
| M3302 | Juvenile dermatomyositis with myopathy |
| M3303 | Juvenile dermatomyositis without myopathy |
| M3309 | Juvenile dermatomyositis with other organ involvement |
| M331 | Other dermatomyositis |
| M3310 | Other dermatomyositis, organ involvement unspecified |
| M3311 | Other dermatomyositis with respiratory involvement |
| M3312 | Other dermatomyositis with myopathy |
| M3313 | Other dermatomyositis without myopathy |
| M3319 | Other dermatomyositis with other organ involvement |
| M332 | Polymyositis |
| M3320 | Polymyositis, organ involvement unspecified |
| M3321 | Polymyositis with respiratory involvement |
| M3322 | Polymyositis with myopathy |
| M3329 | Polymyositis with other organ involvement |
| M339 | Dermatopolymyositis, unspecified |
| M3390 | Dermatopolymyositis, unspecified, organ involvement unspecified |
| M3391 | Dermatopolymyositis, unspecified with respiratory involvement |
| M3392 | Dermatopolymyositis, unspecified with myopathy |
| M3393 | Dermatopolymyositis, unspecified without myopathy |
| M3399 | Dermatopolymyositis, unspecified with other organ involvement |
| M34 | Systemic sclerosis [scleroderma] |
| M340 | Progressive systemic sclerosis |
| M341 | CR(E)ST syndrome |
| M342 | Systemic sclerosis induced by drug and chemical |
| M348 | Other forms of systemic sclerosis |
| M3481 | Systemic sclerosis with lung involvement |
| M3482 | Systemic sclerosis with myopathy |
| M3483 | Systemic sclerosis with polyneuropathy |
| M3489 | Other systemic sclerosis |
| M349 | Systemic sclerosis, unspecified |
| M35 | Other systemic involvement of connective tissue |
| M350 | Sjogren syndrome |
| M3500 | Sjogren syndrome, unspecified |
| M3501 | Sjogren syndrome with keratoconjunctivitis |
| M3502 | Sjogren syndrome with lung involvement |
| M3503 | Sjogren syndrome with myopathy |
| M3504 | Sjogren syndrome with tubulo-interstitial nephropathy |
| M3505 | Sjogren syndrome with inflammatory arthritis |
| M3506 | Sjogren syndrome with peripheral nervous system involvement |
| M3507 | Sjogren syndrome with central nervous system involvement |
| M3508 | Sjogren syndrome with gastrointestinal involvement |