S31.656A — Open bite of abdominal wall, right flank with penetration into peritoneal cavity, initial encounter
Is S31.656A billable?
Yes — S31.656A is billable for FY2027. S31.656A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S31.656A may be submitted for encounters from October 1, 2026 through September 30, 2027.
S31.656A at a glance
| Code | S31.656A |
|---|---|
| Description | Open bite of abdominal wall, right flank with penetration into peritoneal cavity, 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 S31.656A?
In S31.656A, the 7th character A means initial encounter. The 7th character is required for S31.656A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S31.656A group to?
S31.656A sits in MDC 06 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.
- 393Other Digestive System Diagnoses with MCCmedical
- 394Other Digestive System Diagnoses with CCmedical
- 395Other Digestive System Diagnoses without CC/MCCmedical
As a secondary diagnosis, S31.656A is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is S31.656A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S31.656, the nearest indexed parent of S31.656A. Use them to find the family, then select the specific code.
- Bite › flank › right › with penetration into peritoneal cavity (s) (animal) (human)
Excludes1 — never code together — inherited from S31
The conditions below can never be reported together with S31.656A 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 S31.656A 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 S31.656A to fully describe the condition. S31.656A 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 S31.656A, but a patient may have both at the same time. When documentation supports it, S31.656A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S30-S39
The conditions below are not part of S31.656A, but a patient may have both at the same time. When documentation supports it, S31.656A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S31
The conditions below are not part of S31.656A, but a patient may have both at the same time. When documentation supports it, S31.656A and the excluded code may both be reported.
Code also — inherited from S31
Two codes may be needed to describe the condition fully. Whether S31.656A is sequenced first depends on the reason for the encounter.
How long has S31.656A existed?
S31.656A 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.