S32.399K — Other fracture of unspecified ilium, subsequent encounter for fracture with nonunion
Is S32.399K billable?
Yes, but S32.399K will trip a Medicare edit. S32.399K is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, CMS lists S32.399K under Medicare Code Editor edit 20, “Unspecified code” — meaning a code specifying laterality (right, left or bilateral) exists in the same family. On an inpatient claim this triggers the edit, because CMS holds that there are very limited circumstances in which laterality cannot be documented.
S32.399K at a glance
| Code | S32.399K |
|---|---|
| Description | Other fracture of unspecified ilium, 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 S32.399K?
In S32.399K, the 7th character K means subsequent encounter for fracture with nonunion. The 7th character is required for S32.399K to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
What Medicare edits apply to S32.399K?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name S32.399K directly.
A code specifying laterality (right, left or bilateral) exists in the same family. CMS holds that there are very limited circumstances in which laterality cannot be documented.
Which MS-DRGs does S32.399K group to?
S32.399K 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, S32.399K is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is S32.399K listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S32.39, the nearest indexed parent of S32.399K. Use them to find the family, then select the specific code.
- Fracture, traumatic › ilium › specified NEC (abduction) (adduction) (separation)
Excludes1 — never code together — inherited from S32
The conditions below can never be reported together with S32.399K on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- transection of abdomen (S38.3)
Excludes1 — never code together — inherited from S32.3
The conditions below can never be reported together with S32.399K on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- fracture of ilium with associated disruption of pelvic ring (S32.8-)
Code first — inherited from S32
The underlying condition below must be sequenced before S32.399K. S32.399K describes a manifestation and cannot be the principal or first-listed diagnosis.
- any associated spinal cord and spinal nerve injury (S34.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside S32.399K to fully describe the condition. S32.399K 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 S32.399K, but a patient may have both at the same time. When documentation supports it, S32.399K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S30-S39
The conditions below are not part of S32.399K, but a patient may have both at the same time. When documentation supports it, S32.399K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S32
The conditions below are not part of S32.399K, but a patient may have both at the same time. When documentation supports it, S32.399K and the excluded code may both be reported.
- fracture of hip NOS (S72.0-)
How long has S32.399K existed?
S32.399K 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.