S12.101
Unspecified nondisplaced fracture of second cervical vertebra
S12.101 is a non-billable ICD-10-CM code header for unspecified nondisplaced fracture of second cervical vertebra. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. A 7th character is required to complete the code. Its coding notes include a Code first instruction, a Use additional code instruction and 9 Excludes2 entries.
7th character
Category S12 requires a 7th character.
Guidelines tips
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
A fracture not stated as open or closed is coded closed, and one not stated as displaced or not displaced is coded displaced. Nonunion and malunion have their own 7th characters.
The 7th character depends on whether the patient is in active treatment, not on who sees the patient. An aftercare Z code is not used for injury aftercare.
Each injury gets its own code unless a combination code exists, with the most serious injury first. Superficial injuries at the same site as a more severe injury are not coded. Injuries during medical care are coded as complications.
Code first
If the underlying condition listed here is present and known, sequence it first.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (1 note)
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (9 notes)
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Includes
Further defines or gives examples of the content of the category.
- fracture of cervical neural arch
- fracture of cervical spine
- fracture of cervical spinous process
- fracture of cervical transverse process
- fracture of cervical vertebral arch
- fracture of neck
Also from chapter/block level (3 notes)
- injuries of nape
- injuries of supraclavicular region
- injuries of throat
Notes
- A fracture not indicated as displaced or nondisplaced should be coded to displaced
- A fracture not indicated as open or closed should be coded to closed
Also from chapter/block level (2 notes)
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 1 entry
7th-character codes under S12.101 6
- 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