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HomeICD-10 CodesM45
ICD-10-CM
Billable

M45

Classification
Category:
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Coding Guidance
Coding Guidance M45 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail. See Related Codes to drill down to more specific billable codes for appropriate reimbursement.
Inclusion Terms
  • Rheumatoid arthritis of spine
Excludes 1
From
  • arthropathy in Reiter's disease ( M02.3- )
  • juvenile (ankylosing) spondylitis ( M08.1 )
Excludes 2
From
  • Behçet's disease ( M35.2 )
From
  • arthropathic psoriasis ( L40.5- )
  • 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 )

More Specific Codes

M45.0
Ankylosing spondylitis of multiple sites in spine M45.0
M45.1
Ankylosing spondylitis of occipito-atlanto-axial region M45.1
M45.2
Ankylosing spondylitis of cervical region M45.2
M45.3
Ankylosing spondylitis of cervicothoracic region M45.3
M45.4
Ankylosing spondylitis of thoracic region M45.4
M45.5
Ankylosing spondylitis of thoracolumbar region M45.5
M45.6
Ankylosing spondylitis lumbar region M45.6
M45.7
Ankylosing spondylitis of lumbosacral region M45.7
M45.8
Ankylosing spondylitis sacral and sacrococcygeal region M45.8
M45.9
Ankylosing spondylitis of unspecified sites in spine M45.9
M45.A
Non-radiographic axial spondyloarthritis M45.A
M00-M99
M00-M99 - Diseases of the musculoskeletal system and connective tissue

External Resources

2025 ICD-10 guidelines from CMS.gov