certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
compartment syndrome (traumatic) (T79.A-)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
From Chapter 13:
Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
M48.1 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
M48.10
Ankylosing hyperostosis [Forestier], site unspecified
Billable
10
M48.11
Ankylosing hyperostosis [Forestier], occipito-atlanto-axial region
Billable
10
M48.12
Ankylosing hyperostosis [Forestier], cervical region
Billable
10
M48.13
Ankylosing hyperostosis [Forestier], cervicothoracic region
Billable
10
M48.14
Ankylosing hyperostosis [Forestier], thoracic region
Billable
10
M48.15
Ankylosing hyperostosis [Forestier], thoracolumbar region
Billable
10
M48.16
Ankylosing hyperostosis [Forestier], lumbar region
Billable
10
M48.17
Ankylosing hyperostosis [Forestier], lumbosacral region
Billable
10
M48.18
Ankylosing hyperostosis [Forestier], sacral and sacrococcygeal region
Billable
10
M48.19
Ankylosing hyperostosis [Forestier], multiple sites in spine