S89.91XD (Unspecified injury of right lower leg, subsequent encounter) compared with S99 (Other and unspecified injuries of ankle and foot), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Distinct conditions — both may be reported.
“other and unspecified injuries of ankle and foot (S99.-)”
An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.
Source: CMS ICD-10-CM tabular instructional notes
Yes, when both are documented. S89.91XD carries an Excludes2 note covering S99: “other and unspecified injuries of ankle and foot (S99.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
| S89.91XDUnspecified injury of right lower leg, subsequent encounter | S99Other and unspecified injuries of ankle and foot | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: S99.001A, S99.001B, S99.001D, S99.001G, S99.001K |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Unspecified injury of right lower leg, subsequent encounter is a billable ICD-10-CM diagnosis code (S89.91D). | Other and unspecified injuries of ankle and foot is a non-billable ICD-10-CM category code (S99). |
| 7th character | The appropriate 7th character is to be added to each code in subcategory S89.9 | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources