TABLE 2.

Of patients with incomplete ICD-9-CM coding and with fractures other than spinous process, transverse process, or chronic fractures, the table describes the type of fractures missed by ICD-9-CM coding.

Patient	Fracture level documented by ICD code	Description of fracture not coded
1	C5	Right C3, C4, C6 facet fractures
2	C2, C6	C3 spinous process, right C7 facet fractures
3	C2	Right C1 lateral mass avulsion fracture
4	C1, C2	Right C6 lamina and facet, right C7 transverse process through foramen transversarium, coronal fracture of C7 anterior inferior body non-displaced
5	C2	Anterior inferior C5 body fracture, non-displaced
6	C3	Superior articular process of C4 fracture, left transverse process of C4 fracture into foramen transversarium, non-displaced
7	C1, C7	Type II odontoid fracture
8	C6	Left C5 facet fracture
9	C1	Dens fracture, unspecified type
10	C5–7	Anterior inferior C2 body fracture, minimally displaced
11	C1	Type I dens fracture
12	C2	Right C1 fracture through foramen transversarium, right C3 facet fracture, left C5 transverse process through foramen transversarium
13	C6	Right C7 facet fracture
14	C6	Right C7 pars, pedicle, and transverse process fractures
15	C3	Left C4 superior articular process fracture
16	C3	Right superior C4 facet comminuted, displaced fracture