S74.21XA (Injury of cutaneous sensory nerve at hip and thigh level, right leg, initial encounter) compared with S74.21XS (Injury of cutaneous sensory nerve at hip and thigh level, right leg, sequela), from the official CMS tabular data. S74.21XA and S74.21XS code the same injury at a different phase of treatment.
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. S74.21XA and S74.21XS 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.
| S74.21XAInjury of cutaneous sensory nerve at hip and thigh level, right leg, initial encounter | S74.21XSInjury of cutaneous sensory nerve at hip and thigh level, right leg, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| 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 | Injury of cutaneous sensory nerve at hip and thigh level, right leg, initial encounter is a billable ICD-10-CM diagnosis code (S74.21A). | Injury of cutaneous sensory nerve at hip and thigh level, right leg, sequela is a billable ICD-10-CM diagnosis code (S74.21S). |
| 7th character | The appropriate 7th character is to be added to each code from category S74 | The appropriate 7th character is to be added to each code from category S74 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources