S89.391K — Other physeal fracture of lower end of right fibula, subsequent encounter for fracture with nonunion
Is S89.391K billable?
Yes — S89.391K is billable for FY2027. S89.391K is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S89.391K may be submitted for encounters from October 1, 2026 through September 30, 2027.
S89.391K at a glance
| Code | S89.391K |
|---|---|
| Description | Other physeal fracture of lower end of right fibula, subsequent encounter for fracture with nonunion |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "K" | subsequent encounter for fracture with nonunion |
What does the 7th character "K" mean in S89.391K?
In S89.391K, the 7th character K means subsequent encounter for fracture with nonunion. The 7th character is required for S89.391K to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
- Ainitial encounter for closed fractureS89.391A
- Dsubsequent encounter for fracture with routine healingS89.391D
- Gsubsequent encounter for fracture with delayed healingS89.391G
- Ksubsequent encounter for fracture with nonunionS89.391K
- Psubsequent encounter for fracture with malunionS89.391P
- SsequelaS89.391S
Which MS-DRGs does S89.391K group to?
S89.391K sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
- 565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
- 566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical
As a secondary diagnosis, S89.391K is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is S89.391K listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S89.39, the nearest indexed parent of S89.391K. Use them to find the family, then select the specific code.
- Fracture, traumatic › fibula › lower end › physeal › specified NEC (abduction) (adduction) (separation)
Use additional code — inherited from Chapter 19
Report an additional code alongside S89.391K to fully describe the condition. S89.391K is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S89.391K, but a patient may have both at the same time. When documentation supports it, S89.391K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S80-S89
The conditions below are not part of S89.391K, but a patient may have both at the same time. When documentation supports it, S89.391K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S89
The conditions below are not part of S89.391K, but a patient may have both at the same time. When documentation supports it, S89.391K and the excluded code may both be reported.
- other and unspecified injuries of ankle and foot (S99.-)
How long has S89.391K existed?
S89.391K has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.