ICD-10-CM · Billable Code
M43.21 — Fusion of spine, occipito-atlanto-axial region
Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue
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M43.20Fusion of spine, site unspecifiedM43.22Fusion of spine, cervical regionM43.23Fusion of spine, cervicothoracic regionM43.24Fusion of spine, thoracic regionM43.25Fusion of spine, thoracolumbar regionM43.26Fusion of spine, lumbar regionM43.27Fusion of spine, lumbosacral regionM43.28Fusion of spine, sacral and sacrococcygeal region
Common questions about M43.21 (Fusion of spine, occipito-atlanto-axial region)
What does ICD-10 code M43.21 mean?
M43.21 is the ICD-10-CM 2025 code for Fusion of spine, occipito-atlanto-axial region. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is M43.21 a billable diagnosis code?
Yes, M43.21 is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.
Which ICD-10 chapter does M43.21 belong to?
M43.21 belongs to the chapter "Diseases of the musculoskeletal system and connective tissue" (codes M00-M99). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Fusion of spine, occipito-atlanto-axial region?
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Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗