S52.521K — Torus fracture of lower end of right radius, subsequent encounter for fracture with nonunion
Is S52.521K billable?
Yes — S52.521K is billable for FY2027. S52.521K is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S52.521K may be submitted for encounters from October 1, 2026 through September 30, 2027.
S52.521K at a glance
| Code | S52.521K |
|---|---|
| Description | Torus fracture of lower end of right radius, 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 S52.521K?
In S52.521K, the 7th character K means subsequent encounter for fracture with nonunion. The 7th character is required for S52.521K to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
- Ainitial encounter for closed fractureS52.521A
- Dsubsequent encounter for fracture with routine healingS52.521D
- Gsubsequent encounter for fracture with delayed healingS52.521G
- Ksubsequent encounter for fracture with nonunionS52.521K
- Psubsequent encounter for fracture with malunionS52.521P
- SsequelaS52.521S
Which MS-DRGs does S52.521K group to?
S52.521K 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, S52.521K is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is S52.521K listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S52.52, the nearest indexed parent of S52.521K. Use them to find the family, then select the specific code.
- Fracture, traumatic › radius › lower end › torus (abduction) (adduction) (separation)
Excludes1 — never code together — inherited from S52
The conditions below can never be reported together with S52.521K on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- traumatic amputation of forearm (S58.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside S52.521K to fully describe the condition. S52.521K 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 S52.521K, but a patient may have both at the same time. When documentation supports it, S52.521K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S50-S59
The conditions below are not part of S52.521K, but a patient may have both at the same time. When documentation supports it, S52.521K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S52
The conditions below are not part of S52.521K, but a patient may have both at the same time. When documentation supports it, S52.521K and the excluded code may both be reported.
Excludes2 — not included here — inherited from S52.5
The conditions below are not part of S52.521K, but a patient may have both at the same time. When documentation supports it, S52.521K and the excluded code may both be reported.
- physeal fractures of lower end of radius (S59.2-)
How long has S52.521K existed?
S52.521K 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.