S51.85 vs S58
S51.85 (Open bite of forearm) compared with S58 (Traumatic amputation of elbow and forearm), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. S51.85 carries an Excludes1 note covering S58: “traumatic amputation of elbow and forearm (S58.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| S51.85Open bite of forearm | S58Traumatic amputation of elbow and forearm | |
|---|---|---|
| Billing status | Non-billable header Report instead: S51.851A, S51.851D, S51.851S, S51.852A, S51.852D | Non-billable header Report instead: S58.011A, S58.011D, S58.011S, S58.012A, S58.012D |
| 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 | Open bite of forearm is a non-billable ICD-10-CM category code (S51.85). | Traumatic amputation of elbow and forearm is a non-billable ICD-10-CM category code (S58). |
| 7th character | The appropriate 7th character is to be added to each code from category S51 | The appropriate 7th character is to be added to each code from category S58 |
| Includes | Bite of forearm NOS | An amputation not identified as partial or complete should be coded to complete |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources