M45.8
✓ Billable
Ankylosing spondylitis sacral and sacrococcygeal region
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M45.8
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Musculoskeletal System and Connective Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code M45.8?
ICD-10-CM code M45.8 represents Ankylosing spondylitis sacral and sacrococcygeal region. It is a billable diagnosis code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M45.8 billable?
Yes. M45.8 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is M45.8 in?
M45.8 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M45 category
M45
Ankylosing spondylitis
Non-billable
M45.0
Ankylosing spondylitis of multiple sites in spine
Billable
M45.1
Ankylosing spondylitis of occipito-atlanto-axial region
Billable
M45.2
Ankylosing spondylitis of cervical region
Billable
M45.3
Ankylosing spondylitis of cervicothoracic region
Billable
M45.4
Ankylosing spondylitis of thoracic region
Billable
M45.5
Ankylosing spondylitis of thoracolumbar region
Billable
M45.6
Ankylosing spondylitis lumbar region
Billable
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