ICD-10-CM diagnosis code
M46.01 Spinal enthesopathy, occipito-atlanto-axial region
- Billable
- Yes, a complete code (FY2026)
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Other codes in M46
70 complete codes in this category.
- M46.00Spinal enthesopathy, site unspecified
- M46.01Spinal enthesopathy, occipito-atlanto-axial region
- M46.02Spinal enthesopathy, cervical region
- M46.03Spinal enthesopathy, cervicothoracic region
- M46.04Spinal enthesopathy, thoracic region
- M46.05Spinal enthesopathy, thoracolumbar region
- M46.06Spinal enthesopathy, lumbar region
- M46.07Spinal enthesopathy, lumbosacral region
- M46.08Spinal enthesopathy, sacral and sacrococcygeal region
- M46.09Spinal enthesopathy, multiple sites in spine
- M46.1Sacroiliitis, not elsewhere classified
- M46.20Osteomyelitis of vertebra, site unspecified
Documentation tips
- Make sure the note supports every element of the title, “Spinal enthesopathy, occipito-atlanto-axial region”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to M46.
The international WHO ICD-10 also has M46, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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