S91 ICD-10-CM Code: Open wound of ankle, foot and toes
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
S91Open wound of ankle, foot and toes
ICD-10-CM diagnosis code · United States clinical modification
Where S91 sits
- 1
Chapter 19
Injury, poisoning and certain other consequences of external causes (S00-T88)
- 2
Section
Injuries to the ankle and foot (S90-S99)
- 3
Category S91
Open wound of ankle, foot and toes
- 4
Code S91
Open wound of ankle, foot and toes
Codes under S91
S91 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for S91.
Code first
No “code first” instruction is listed for S91.
Use additional code
No “use additional code” instruction is listed for S91.
Excludes1
Conditions that should not be reported together with this code.
- open fracture of ankle, foot and toes (S92.-with 7th character B)
- traumatic amputation of ankle and foot (S98.-)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for S91.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code S91 mean?
S91 is the FY 2027 U.S. ICD-10-CM code for “Open wound of ankle, foot and toes.”
Is S91 a billable or specific ICD-10-CM code?
No. S91 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is S91 located in ICD-10-CM?
S91 is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Injuries to the ankle and foot (S90-S99) (S90–S99), under category S91, Open wound of ankle, foot and toes.
What coding notes are listed for S91?
No inclusion terms are listed for S91 in this reference record. No code-first instruction is listed. Excludes1 notes: open fracture of ankle, foot and toes (S92.-with 7th character B); traumatic amputation of ankle and foot (S98.-). No Excludes2 note is listed.