S23.428A — Other sprain of sternum, initial encounter
Is S23.428A billable?
Yes — S23.428A is billable for FY2027. S23.428A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S23.428A may be submitted for encounters from October 1, 2026 through September 30, 2027.
S23.428A at a glance
| Code | S23.428A |
|---|---|
| Description | Other sprain of sternum, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in S23.428A?
In S23.428A, the 7th character A means initial encounter. The 7th character is required for S23.428A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S23.428A group to?
S23.428A sits in MDC 04 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 205Other Respiratory System Diagnoses with MCCmedical
- 206Other Respiratory System Diagnoses without MCCmedical
How is S23.428A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S23.428, the nearest indexed parent of S23.428A. Use them to find the family, then select the specific code.
- Sprain › sternum › specified site NEC (joint) (ligament)
Use additional code — inherited from Chapter 19
Report an additional code alongside S23.428A to fully describe the condition. S23.428A 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 S23.428A, but a patient may have both at the same time. When documentation supports it, S23.428A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S20-S29
The conditions below are not part of S23.428A, but a patient may have both at the same time. When documentation supports it, S23.428A and the excluded code may both be reported.
- burns and corrosions (T20-T32)
- effects of foreign body in bronchus (T17.5)
- effects of foreign body in esophagus (T18.1)
- effects of foreign body in lung (T17.8)
- effects of foreign body in trachea (T17.4)
- frostbite (T33-T34)
- injuries of axilla
- injuries of clavicle
- injuries of scapular region
- injuries of shoulder
- insect bite or sting, venomous (T63.4)
Excludes2 — not included here — inherited from S23
The conditions below are not part of S23.428A, but a patient may have both at the same time. When documentation supports it, S23.428A and the excluded code may both be reported.
Code also — inherited from S23
Two codes may be needed to describe the condition fully. Whether S23.428A is sequenced first depends on the reason for the encounter.
- any associated open wound
How long has S23.428A existed?
S23.428A 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.