S36.400A vs S36.400S
S36.400A (Unspecified injury of duodenum, initial encounter) compared with S36.400S (Unspecified injury of duodenum, sequela), from the official CMS tabular data. S36.400A and S36.400S code the same injury at a different phase of treatment.
Can these codes be reported together?
Same injury, other encounter phase. S36.400A and S36.400S 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.
Side by side
| S36.400AUnspecified injury of duodenum, initial encounter | S36.400SUnspecified injury of duodenum, 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 | Unspecified injury of duodenum, initial encounter is a billable ICD-10-CM diagnosis code (S36.400A). | Unspecified injury of duodenum, sequela is a billable ICD-10-CM diagnosis code (S36.400S). |
| 7th character | The appropriate 7th character is to be added to each code from category S36 | The appropriate 7th character is to be added to each code from category S36 |
| Includes | injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia | injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources