S32.399A (Other fracture of unspecified ilium, initial encounter for closed fracture) compared with S32.399K (Other fracture of unspecified ilium, subsequent encounter for fracture with nonunion), from the official CMS tabular data. S32.399A and S32.399K 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. S32.399A and S32.399K 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.
| S32.399AOther fracture of unspecified ilium, initial encounter for closed fracture | S32.399KOther fracture of unspecified ilium, subsequent encounter for fracture with nonunion | |
|---|---|---|
| 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 | Other fracture of unspecified ilium, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S32.399A). | Other fracture of unspecified ilium, subsequent encounter for fracture with nonunion is a billable ICD-10-CM diagnosis code (S32.399K). |
| 7th character | The appropriate 7th character is to be added to each code from category S32 | The appropriate 7th character is to be added to each code from category S32 |
| Includes | fracture of lumbosacral neural arch fracture of lumbosacral spinous process fracture of lumbosacral transverse process fracture of lumbosacral vertebra | fracture of lumbosacral neural arch fracture of lumbosacral spinous process fracture of lumbosacral transverse process fracture of lumbosacral vertebra |
| Code first | any associated spinal cord and spinal nerve injury (S34.-) | any associated spinal cord and spinal nerve injury (S34.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources