Non-Billable / Non-Specific Code
ICD-10-CM S99 is the diagnosis code for Other and unspecified injuries of ankle and foot. 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.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where S99 sits in the ICD-10-CM classification helps ensure proper coding:
No, S99 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
S99 is the ICD-10-CM diagnosis code for "Other and unspecified injuries of ankle and foot". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
S99 is located in Section S90-S99 — "Injuries to the ankle and foot" within Chapter 19 of the ICD-10-CM Tabular List.
S99 has 5 sub-code(s) that provide more specific detail: S99.0, S99.1, S99.2, S99.8, S99.9.
Use S99 when the patients documented diagnosis matches "Other and unspecified injuries of ankle and foot" 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 Other and unspecified injuries of ankle and foot is S99.
No, S99 is non-billable. Use a more specific sub-code for primary diagnosis billing.
S99 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S99 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.