S25.191A (Other specified injury of right innominate or subclavian artery, initial encounter) compared with S25.191S (Other specified injury of right innominate or subclavian artery, sequela), from the official CMS tabular data. S25.191A and S25.191S 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. S25.191A and S25.191S 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.
| S25.191AOther specified injury of right innominate or subclavian artery, initial encounter | S25.191SOther specified injury of right innominate or subclavian artery, 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 | Other specified injury of right innominate or subclavian artery, initial encounter is a billable ICD-10-CM diagnosis code (S25.191A). | Other specified injury of right innominate or subclavian artery, sequela is a billable ICD-10-CM diagnosis code (S25.191S). |
| 7th character | The appropriate 7th character is to be added to each code from category S25 | The appropriate 7th character is to be added to each code from category S25 |
| Includes | injuries of breast injuries of chest (wall) injuries of interscapular area | injuries of breast injuries of chest (wall) injuries of interscapular area |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources