S91.042A — Puncture wound with foreign body, left ankle, initial encounter
Is S91.042A billable?
Yes — S91.042A is billable for FY2027. S91.042A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S91.042A may be submitted for encounters from October 1, 2026 through September 30, 2027.
S91.042A at a glance
| Code | S91.042A |
|---|---|
| Description | Puncture wound with foreign body, left ankle, 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 S91.042A?
In S91.042A, the 7th character A means initial encounter. The 7th character is required for S91.042A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S91.042A group to?
S91.042A sits in MDC 21 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.
- 913Traumatic Injury with MCCmedical
- 914Traumatic Injury without MCCmedical
How is S91.042A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S91.042, the nearest indexed parent of S91.042A. Use them to find the family, then select the specific code.
- Puncture › ankle › left › with › foreign body
Excludes1 — never code together — inherited from S91
The conditions below can never be reported together with S91.042A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- open fracture of ankle, foot and toes (S92.-with 7th character B)
- traumatic amputation of ankle and foot (S98.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside S91.042A to fully describe the condition. S91.042A 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 S91.042A, but a patient may have both at the same time. When documentation supports it, S91.042A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S90-S99
The conditions below are not part of S91.042A, but a patient may have both at the same time. When documentation supports it, S91.042A and the excluded code may both be reported.
Code also — inherited from S91
Two codes may be needed to describe the condition fully. Whether S91.042A is sequenced first depends on the reason for the encounter.
- any associated wound infection
How long has S91.042A existed?
S91.042A 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.