S91.309 — Unspecified open wound, unspecified foot
Is S91.309 billable?
No — S91.309 is a non-billable header code. S91.309 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath S91.309.
S91.309 at a glance
| Code | S91.309 |
|---|---|
| Description | Unspecified open wound, unspecified foot |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is S91.309 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S91.30, the nearest indexed parent of S91.309. Use them to find the family, then select the specific code.
- Wound, open › foot
Excludes1 — never code together — inherited from S91
The conditions below can never be reported together with S91.309 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 S91.309 to fully describe the condition. S91.309 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 S91.309, but a patient may have both at the same time. When documentation supports it, S91.309 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S90-S99
The conditions below are not part of S91.309, but a patient may have both at the same time. When documentation supports it, S91.309 and the excluded code may both be reported.
Code also — inherited from S91
Two codes may be needed to describe the condition fully. Whether S91.309 is sequenced first depends on the reason for the encounter.
- any associated wound infection
What codes fall under S91.309? (3)
How long has S91.309 existed?
S91.309 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.