| M991 | Subluxation complex (vertebral) |
| M9910 | Subluxation complex (vertebral) of head region |
| M9911 | Subluxation complex (vertebral) of cervical region |
| M9912 | Subluxation complex (vertebral) of thoracic region |
| M9913 | Subluxation complex (vertebral) of lumbar region |
| M9914 | Subluxation complex (vertebral) of sacral region |
| M9915 | Subluxation complex (vertebral) of pelvic region |
| M9916 | Subluxation complex (vertebral) of lower extremity |
| M9917 | Subluxation complex (vertebral) of upper extremity |
| M9918 | Subluxation complex (vertebral) of rib cage |
| M9919 | Subluxation complex (vertebral) of abdomen and other regions Subluxation complex (vertebral) of abdomen and other regions |
| M992 | Subluxation stenosis of neural canal |
| M9920 | Subluxation stenosis of neural canal of head region |
| M9921 | Subluxation stenosis of neural canal of cervical region |
| M9922 | Subluxation stenosis of neural canal of thoracic region |
| M9923 | Subluxation stenosis of neural canal of lumbar region |
| M9924 | Subluxation stenosis of neural canal of sacral region |
| M9925 | Subluxation stenosis of neural canal of pelvic region |
| M9926 | Subluxation stenosis of neural canal of lower extremity |
| M9927 | Subluxation stenosis of neural canal of upper extremity |
| M9928 | Subluxation stenosis of neural canal of rib cage |
| M9929 | Subluxation stenosis of neural canal of abdomen and other regions |
| M993 | Osseous stenosis of neural canal |
| M9930 | Osseous stenosis of neural canal of head region |
| M9931 | Osseous stenosis of neural canal of cervical region |
| M9932 | Osseous stenosis of neural canal of thoracic region |
| M9933 | Osseous stenosis of neural canal of lumbar region |
| M9934 | Osseous stenosis of neural canal of sacral region |
| M9935 | Osseous stenosis of neural canal of pelvic region |
| M9936 | Osseous stenosis of neural canal of lower extremity |
| M9937 | Osseous stenosis of neural canal of upper extremity |
| M9938 | Osseous stenosis of neural canal of rib cage |
| M9939 | Osseous stenosis of neural canal of abdomen and other regions |
| M994 | Connective tissue stenosis of neural canal |
| M9940 | Connective tissue stenosis of neural canal of head region |
| M9941 | Connective tissue stenosis of neural canal of cervical region |
| M9942 | Connective tissue stenosis of neural canal of thoracic region |
| M9943 | Connective tissue stenosis of neural canal of lumbar region |
| M9944 | Connective tissue stenosis of neural canal of sacral region |
| M9945 | Connective tissue stenosis of neural canal of pelvic region |
| M9946 | Connective tissue stenosis of neural canal of lower extremity |
| M9947 | Connective tissue stenosis of neural canal of upper extremity |
| M9948 | Connective tissue stenosis of neural canal of rib cage |
| M9949 | Connective tissue stenosis of neural canal of abdomen and other regions |
| M995 | Intervertebral disc stenosis of neural canal |
| M9950 | Intervertebral disc stenosis of neural canal of head region |
| M9951 | Intervertebral disc stenosis of neural canal of cervical region |
| M9952 | Intervertebral disc stenosis of neural canal of thoracic region |
| M9953 | Intervertebral disc stenosis of neural canal of lumbar region |
| M9954 | Intervertebral disc stenosis of neural canal of sacral region |