S50.12XA (Contusion of left forearm, initial encounter) compared with S50.12XD (Contusion of left forearm, subsequent encounter), from the official CMS tabular data. S50.12XA and S50.12XD code the same injury at a different phase of treatment. MedCoder-derived
Same underlying diagnosis, different encounter phase.
The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.
Source: ICD-10-CM Official Guidelines, Section I.C.19.a
Same injury, other encounter phase. S50.12XA and S50.12XD code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.
| S50.12XAContusion of left forearm, initial encounter | S50.12XDContusion of left forearm, subsequent encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Contusion of left forearm, initial encounter is a billable ICD-10-CM diagnosis code (S50.12A). | Contusion of left forearm, subsequent encounter is a billable ICD-10-CM diagnosis code (S50.12D). |
| 7th character | The appropriate 7th character is to be added to each code from category S50 | The appropriate 7th character is to be added to each code from category S50 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources