M48.02 identifies pathological narrowing of the spinal canal within the cervical region (C2–C7), which can compress the spinal cord or nerve roots and produce myelopathy, radiculopathy, or both.

Documentation tips

What should appear in the chart to support M48.02.

Source · Editorial brief grounded in 9 cited references ↓

• Specify the exact cervical level(s) involved (e.g., C4–C5, C5–C6) in the assessment or imaging interpretation — M48.02 covers C2–C7, and level detail supports medical necessity even though the code itself does not require it.
• Document whether myelopathy or radiculopathy is present as a separate finding; these are separately reportable and must be supported by clinical exam findings (e.g., hyperreflexia, dermatomal numbness, positive Spurling's test).
• Reference the MRI report explicitly in the encounter note — include findings such as spinal canal diameter, cord signal change, foraminal narrowing, or Kellgren-style degenerative descriptors where applicable.
• Distinguish stenosis from disc herniation as the primary pathology; if both are present, document which is driving the clinical symptoms to justify M48.02 over or alongside an M50-series code.
• Record the history of conservative management (physical therapy, cervical injections, NSAIDs) when moving toward surgical intervention — payers require this for prior authorization of procedures like laminectomy or ACDF.

Related CPT procedures

Procedure codes commonly billed with M48.02. Linking the right diagnosis to the right procedure is what establishes medical necessity.

Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis

Common coding pitfalls

The recurring mistakes coders make with M48.02 and adjacent codes.

Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓

• Defaulting to M48.00 (site unspecified) when the provider documented 'cervical' stenosis — M48.02 is correct when the cervical region is named, and specificity is required for clean claims.
• Using M48.02 when disc herniation is the documented cause of cord or nerve compression — that scenario maps to M50.0x2 or M50.022, not M48.02.
• Coding M48.02 alone when the encounter note also documents myelopathy or radiculopathy — those manifestations require additional codes (e.g., M54.12) to fully reflect the clinical picture and support procedure medical necessity.
• Confusing M48.02 (cervical, C2–C7) with M48.03 (cervicothoracic region) when stenosis is documented at the C7–T1 junction — review imaging for the exact transition zone.

Clinical context

Source · Editorial summary grounded in 9 cited references ↓

Sibling codes

Other billable codes under M48.0 (laterality / anatomic variants).