Non-Billable / Non-Specific Code
ICD-10-CM S91 is the diagnosis code for Open wound of ankle, foot and toes. This code falls under the section "Injuries to the ankle and foot" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as S91. They are mutually exclusive:
Understanding where S91 sits in the ICD-10-CM classification helps ensure proper coding:
No, S91 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
S91 is the ICD-10-CM diagnosis code for "Open wound of ankle, foot and toes". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
S91 is located in Section S90-S99 — "Injuries to the ankle and foot" within Chapter 19 of the ICD-10-CM Tabular List.
S91 has 4 sub-code(s) that provide more specific detail: S91.0, S91.1, S91.2, S91.3.
Use S91 when the patients documented diagnosis matches "Open wound of ankle, foot and toes" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Open wound of ankle, foot and toes is S91.
No, S91 is non-billable. Use a more specific sub-code for primary diagnosis billing.
S91 is in Chapter 19 of the ICD-10-CM Tabular List.
Type 1 Excludes for S91 include: open fracture of ankle, foot and toes (S92.-with 7th character B); traumatic amputation of ankle and foot (S98.-).
Yes, S91 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.