S35.339A — Unspecified injury of superior mesenteric vein, initial encounter
Is S35.339A billable?
Yes, but S35.339A is an unspecified code. S35.339A is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S35.339A is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting S35.339A — the more specific alternatives are listed below.
More specific alternatives
S35.339A at a glance
| Code | S35.339A |
|---|---|
| Description | Unspecified injury of superior mesenteric vein, 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 S35.339A?
In S35.339A, the 7th character A means initial encounter. The 7th character is required for S35.339A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S35.339A group to?
S35.339A 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
As a secondary diagnosis, S35.339A is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is S35.339A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S35.339, the nearest indexed parent of S35.339A. Use them to find the family, then select the specific code.
- Injury › mesenteric › vein › superior
Use additional code — inherited from Chapter 19
Report an additional code alongside S35.339A to fully describe the condition. S35.339A 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 S35.339A, but a patient may have both at the same time. When documentation supports it, S35.339A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S30-S39
The conditions below are not part of S35.339A, but a patient may have both at the same time. When documentation supports it, S35.339A and the excluded code may both be reported.
Code also — inherited from S35
Two codes may be needed to describe the condition fully. Whether S35.339A is sequenced first depends on the reason for the encounter.
- any associated open wound (S31.-)
How long has S35.339A existed?
S35.339A 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.