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ICD-10-CM · FY 2026 APRIL UPDATE

S12.1

Fracture of second cervical vertebra

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
S12.10Unspecified fracture of second cervical vertebraCategory
S12.100Unspecified displaced fracture of second cervical vertebraCategory
S12.100AUnspecified displaced fracture of second cervical vertebra, initial encounter for closed fractureBillable
S12.100BUnspecified displaced fracture of second cervical vertebra, initial encounter for open fractureBillable
S12.100DUnspecified displaced fracture of second cervical vertebra, subsequent encounter for fracture with routine healingBillable
S12.100GUnspecified displaced fracture of second cervical vertebra, subsequent encounter for fracture with delayed healingBillable
S12.100KUnspecified displaced fracture of second cervical vertebra, subsequent encounter for fracture with nonunionBillable
S12.100SUnspecified displaced fracture of second cervical vertebra, sequelaBillable
S12.101Unspecified nondisplaced fracture of second cervical vertebraCategory
S12.101AUnspecified nondisplaced fracture of second cervical vertebra, initial encounter for closed fractureBillable
S12.101BUnspecified nondisplaced fracture of second cervical vertebra, initial encounter for open fractureBillable
S12.101DUnspecified nondisplaced fracture of second cervical vertebra, subsequent encounter for fracture with routine healingBillable
S12.101GUnspecified nondisplaced fracture of second cervical vertebra, subsequent encounter for fracture with delayed healingBillable
S12.101KUnspecified nondisplaced fracture of second cervical vertebra, subsequent encounter for fracture with nonunionBillable
S12.101SUnspecified nondisplaced fracture of second cervical vertebra, sequelaBillable
S12.11Type II dens fractureCategory
S12.110Anterior displaced Type II dens fractureCategory
S12.110AAnterior displaced Type II dens fracture, initial encounter for closed fractureBillable
S12.110BAnterior displaced Type II dens fracture, initial encounter for open fractureBillable
S12.110DAnterior displaced Type II dens fracture, subsequent encounter for fracture with routine healingBillable
S12.110GAnterior displaced Type II dens fracture, subsequent encounter for fracture with delayed healingBillable
S12.110KAnterior displaced Type II dens fracture, subsequent encounter for fracture with nonunionBillable
S12.110SAnterior displaced Type II dens fracture, sequelaBillable
S12.111Posterior displaced Type II dens fractureCategory
S12.111APosterior displaced Type II dens fracture, initial encounter for closed fractureBillable
S12.111BPosterior displaced Type II dens fracture, initial encounter for open fractureBillable
S12.111DPosterior displaced Type II dens fracture, subsequent encounter for fracture with routine healingBillable
S12.111GPosterior displaced Type II dens fracture, subsequent encounter for fracture with delayed healingBillable
S12.111KPosterior displaced Type II dens fracture, subsequent encounter for fracture with nonunionBillable
S12.111SPosterior displaced Type II dens fracture, sequelaBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.