FY2027 ICD-10-CM reference
S12.64XA: Type III traumatic spondylolisthesis of seventh cervical vertebra, initial encounter for closed fracture
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Type III traumatic spondylolisthesis of seventh cervical vertebra, initial encounter for closed fracture. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
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
Source: S00-T88 (chapter, inherited).
Instructional note
code to identify any retained foreign body, if applicable (Z18.-)
Source: S00-T88 (chapter, inherited).
Excludes2
birth trauma (P10-P15)
Source: S00-T88 (chapter, inherited).
Excludes2
obstetric trauma (O70-O71)
Source: S00-T88 (chapter, inherited).
Instructional note
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.
Source: S00-T88 (chapter, inherited).
Includes
injuries of nape
Source: S10-S19 (section, inherited).
Includes
injuries of supraclavicular region
Source: S10-S19 (section, inherited).
Includes
injuries of throat
Source: S10-S19 (section, inherited).
Excludes2
burns and corrosions (T20-T32)
Source: S10-S19 (section, inherited).
Excludes2
effects of foreign body in esophagus (T18.1)
Source: S10-S19 (section, inherited).
Excludes2
effects of foreign body in larynx (T17.3)
Source: S10-S19 (section, inherited).
Excludes2
effects of foreign body in pharynx (T17.2)
Source: S10-S19 (section, inherited).
Excludes2
effects of foreign body in trachea (T17.4)
Source: S10-S19 (section, inherited).
Excludes2
frostbite (T33-T34)
Source: S10-S19 (section, inherited).
Excludes2
insect bite or sting, venomous (T63.4)
Source: S10-S19 (section, inherited).
Instructional note
A fracture not indicated as displaced or nondisplaced should be coded to displaced
Source: S12 (category, inherited).
Instructional note
A fracture not indicated as open or closed should be coded to closed
Source: S12 (category, inherited).
Includes
fracture of cervical neural arch
Source: S12 (category, inherited).
Includes
fracture of cervical spine
Source: S12 (category, inherited).
Includes
fracture of cervical spinous process
Source: S12 (category, inherited).
Includes
fracture of cervical transverse process
Source: S12 (category, inherited).
Includes
fracture of cervical vertebral arch
Source: S12 (category, inherited).
Includes
fracture of neck
Source: S12 (category, inherited).
Code first
any associated cervical spinal cord injury (S14.0, S14.1-)
Source: S12 (category, inherited).
Seventh-character instruction
The appropriate 7th character is to be added to all codes from subcategories S12.0-S12.6
Source: S12 (category, inherited).
Instructional note
initial encounter for closed fracture
Source: S12 (category, inherited).
Instructional note
initial encounter for open fracture
Source: S12 (category, inherited).
Instructional note
subsequent encounter for fracture with routine healing
Source: S12 (category, inherited).
Instructional note
subsequent encounter for fracture with delayed healing
Source: S12 (category, inherited).
Instructional note
subsequent encounter for fracture with nonunion
Source: S12 (category, inherited).
Instructional note
sequela
Source: S12 (category, inherited).
Seventh-character definitions
- A: initial encounter for closed fracture
- B: initial encounter for open fracture
- D: subsequent encounter for fracture with routine healing
- G: subsequent encounter for fracture with delayed healing
- K: subsequent encounter for fracture with nonunion
- S: sequela
Compare the FY2027 additions, removals and billable-status changes
What does S12.64XA mean in FY2027?
The official ICD-10-CM descriptor is Type III traumatic spondylolisthesis of seventh cervical vertebra, initial encounter for closed fracture. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is S12.64XA billable in FY2027?
The FY2027 order file marks S12.64XA as billable. Check the complete Tabular instructions and documentation before assigning it.
Does S12.64XA map to an HCC?
In the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service), S12.64XA maps to CMS-HCC V28 HCC 401 (Vertebral Fractures without Spinal Cord Injury). For 2027 dates of service, CMS has not yet published the payment year 2028 mappings. Under the PY2026 CMS mapping; CMS 2027 initial file unchanged: ESRD HCC 169; no RxHCC category. Coefficients for these models are pending verification for payment year 2027. CMS-HCC V24, PACE and HHS-HCC mappings are still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition