M45.1 - Ankylosing spondylitis of occipito-atlanto-axial region

The ICD 10 Code for Ankylosing spondylitis of occipito-atlanto-axial region is listed as M45.1.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field	Value
Diagnosis Code:	M45.1
Description:	Ankylosing spondylitis of occipito-atlanto-axial region
Diagnostic Related Groups (MS-DRG v30.0)	545 - Connective Tissue Disorders W Mcc 546 - Connective Tissue Disorders W Cc 547 - Connective Tissue Disorders W/o Cc/mcc

Chapter	Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block	Spondylopathies (M45-M49)
Parent	M45 - Ankylosing spondylitis
ICD-9-CM Diagnosis Codes General Equivalence Mappings (GEMS):
ICD 9 Dx Code:	720.0 - Ankylosing spondylitis (approximate)
ICD-10-CM Siblings (same level / similar specificity) of M45.1:
M45.0 - Ankylosing spondylitis of multiple sites in spine
M45.2 - Ankylosing spondylitis of cervical region
M45.3 - Ankylosing spondylitis of cervicothoracic region
M45.4 - Ankylosing spondylitis of thoracic region
M45.5 - Ankylosing spondylitis of thoracolumbar region
M45.6 - Ankylosing spondylitis lumbar region
M45.7 - Ankylosing spondylitis of lumbosacral region
M45.8 - Ankylosing spondylitis sacral and sacrococcygeal region
M45.9 - Ankylosing spondylitis of unspecified sites in spine