S12.64XA (Type III traumatic spondylolisthesis of seventh cervical vertebra, initial encounter for closed fracture) compared with S12.64XS (Type III traumatic spondylolisthesis of seventh cervical vertebra, sequela), from the official CMS tabular data. S12.64XA and S12.64XS code the same injury at a different phase of treatment.
Same underlying diagnosis, different encounter phase.
The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.
Source: ICD-10-CM Official Guidelines, Section I.C.19.a
Same injury, other encounter phase. S12.64XA and S12.64XS code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.
| S12.64XAType III traumatic spondylolisthesis of seventh cervical vertebra, initial encounter for closed fracture | S12.64XSType III traumatic spondylolisthesis of seventh cervical vertebra, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Type III traumatic spondylolisthesis of seventh cervical vertebra, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S12.64A). | Type III traumatic spondylolisthesis of seventh cervical vertebra, sequela is a billable ICD-10-CM diagnosis code (S12.64S). |
| 7th character | The appropriate 7th character is to be added to all codes from subcategories S12.0-S12.6 | The appropriate 7th character is to be added to all codes from subcategories S12.0-S12.6 |
| Includes | fracture of cervical neural arch fracture of cervical spine fracture of cervical spinous process fracture of cervical transverse process | fracture of cervical neural arch fracture of cervical spine fracture of cervical spinous process fracture of cervical transverse process |
| Code first | any associated cervical spinal cord injury (S14.0, S14.1-) | any associated cervical spinal cord injury (S14.0, S14.1-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources