S31.65AS — Open bite of abdominal wall, unspecified flank with penetration into peritoneal cavity, sequela
Is S31.65AS billable?
Yes, but S31.65AS is an unspecified code. S31.65AS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S31.65AS 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 S31.65AS — the more specific alternatives are listed below.
More specific alternatives
- S31.650SOpen bite of abdominal wall, right upper quadrant with penetration into peritoneal cavity, sequela
- S31.651SOpen bite of abdominal wall, left upper quadrant with penetration into peritoneal cavity, sequela
- S31.652SOpen bite of abdominal wall, epigastric region with penetration into peritoneal cavity, sequela
- S31.653SOpen bite of abdominal wall, right lower quadrant with penetration into peritoneal cavity, sequela
- S31.654SOpen bite of abdominal wall, left lower quadrant with penetration into peritoneal cavity, sequela
- S31.655SOpen bite of abdominal wall, periumbilic region with penetration into peritoneal cavity, sequela
- S31.656SOpen bite of abdominal wall, right flank with penetration into peritoneal cavity, sequela
- S31.657SOpen bite of abdominal wall, left flank with penetration into peritoneal cavity, sequela
S31.65AS at a glance
| Code | S31.65AS |
|---|---|
| Description | Open bite of abdominal wall, unspecified flank with penetration into peritoneal cavity, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in S31.65AS?
In S31.65AS, the 7th character S means sequela. The 7th character is required for S31.65AS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S31.65AS group to?
S31.65AS sits in MDC 09 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.
- 604Trauma to the Skin, Subcutaneous Tissue and Breast with MCCmedical
- 605Trauma to the Skin, Subcutaneous Tissue and Breast without MCCmedical
How is S31.65AS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S31.65A, the nearest indexed parent of S31.65AS. Use them to find the family, then select the specific code.
- Bite › flank › with penetration into peritoneal cavity (s) (animal) (human)
Inclusion terms
Alternative wording in documentation that is classified to S31.65AS.
- Open bite of abdominal wall, flank NOS, with penetration into peritoneal cavity
Excludes1 — never code together — inherited from S31
The conditions below can never be reported together with S31.65AS on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from S31.65
The conditions below can never be reported together with S31.65AS on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 19
Report an additional code alongside S31.65AS to fully describe the condition. S31.65AS 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 S31.65AS, but a patient may have both at the same time. When documentation supports it, S31.65AS and the excluded code may both be reported.
Excludes2 — not included here — inherited from S30-S39
The conditions below are not part of S31.65AS, but a patient may have both at the same time. When documentation supports it, S31.65AS and the excluded code may both be reported.
Excludes2 — not included here — inherited from S31
The conditions below are not part of S31.65AS, but a patient may have both at the same time. When documentation supports it, S31.65AS and the excluded code may both be reported.
Code also — inherited from S31
Two codes may be needed to describe the condition fully. Whether S31.65AS is sequenced first depends on the reason for the encounter.
How long has S31.65AS existed?
S31.65AS first appears in FY2026.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.