S84.01XA (Injury of tibial nerve at lower leg level, right leg, initial encounter) compared with S84.01XD (Injury of tibial nerve at lower leg level, right leg, subsequent encounter), from the official CMS tabular data. S84.01XA and S84.01XD 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. S84.01XA and S84.01XD 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.
| S84.01XAInjury of tibial nerve at lower leg level, right leg, initial encounter | S84.01XDInjury of tibial nerve at lower leg level, right leg, 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 | Injury of tibial nerve at lower leg level, right leg, initial encounter is a billable ICD-10-CM diagnosis code (S84.01A). | Injury of tibial nerve at lower leg level, right leg, subsequent encounter is a billable ICD-10-CM diagnosis code (S84.01D). |
| 7th character | The appropriate 7th character is to be added to each code from category S84 | The appropriate 7th character is to be added to each code from category S84 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources