S31.835A — Open bite of anus, initial encounter
Is S31.835A billable?
Yes — S31.835A is billable for FY2027. S31.835A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S31.835A may be submitted for encounters from October 1, 2026 through September 30, 2027.
S31.835A at a glance
| Code | S31.835A |
|---|---|
| Description | Open bite of anus, 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 S31.835A?
In S31.835A, the 7th character A means initial encounter. The 7th character is required for S31.835A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S31.835A group to?
S31.835A 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 S31.835A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S31.835, the nearest indexed parent of S31.835A. Use them to find the family, then select the specific code.
- Bite › anus (s) (animal) (human)
- Wound, open › anus › bite
Excludes1 — never code together
The conditions below can never be reported together with S31.835A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- superficial bite of anus (S30.877)
Inclusion terms
Alternative wording in documentation that is classified to S31.835A.
- Bite of anus NOS
Excludes1 — never code together — inherited from S31
The conditions below can never be reported together with S31.835A 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 S31.835
The conditions below can never be reported together with S31.835A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- superficial bite of anus (S30.877)
Use additional code — inherited from Chapter 19
Report an additional code alongside S31.835A to fully describe the condition. S31.835A 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 S31.835A, but a patient may have both at the same time. When documentation supports it, S31.835A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S30-S39
The conditions below are not part of S31.835A, but a patient may have both at the same time. When documentation supports it, S31.835A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S31
The conditions below are not part of S31.835A, but a patient may have both at the same time. When documentation supports it, S31.835A and the excluded code may both be reported.
Code also — inherited from S31
Two codes may be needed to describe the condition fully. Whether S31.835A is sequenced first depends on the reason for the encounter.
How long has S31.835A existed?
S31.835A 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.