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S12.9XXA

S12.9XXA: Fracture of neck, unspecified, initial encounter

Billable / specific codeICD-10-CM

S12.9XXA is a billable, specific ICD-10-CM code for fracture of neck, unspecified, initial encounter. It is valid for submission on a claim.

Check S12.9XXA with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to code S12.9

A
initial encounter
D
subsequent encounter
S
sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Fracture of neck NOS
  • Fracture of cervical spine NOS
  • Fracture of cervical vertebra NOS

Other codes that can never be billed with S12.9XXA

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • M48.5Collapsed vertebra, not elsewhere classified
  • M84.3Stress fracture
  • M84.4Pathological fracture, not elsewhere classified

Risk adjustment

S12.9XXA risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 401 Vertebral Fractures without Spinal Cord Injury0.522 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

S12.9XXA is named in 13 Medicare coverage policies: 13 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56722Billing and Coding: Intraoperative Neurophysiological Testing
  • A57132Billing and Coding: Bone Mass Measurement
  • A57204Billing and Coding: MRI and CT Scans of the Head and Neck
  • A57205Billing and Coding: Oximetry Services

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under S12.9

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.