S36.400A Unspecified injury of duodenum, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S36.400 with 7th character A (initial encounter).

Applies from S36 Injury of intra-abdominal organs

Code also

• any associated open wound (S31.-)

7th character note

• The appropriate 7th character is to be added to each code from category S36

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Code annotations containing back-references to S36.400A

Back-references to S36

• Use Additional: S38.1 Crushing injury of abdomen, lower back, and pelvis ("injury to intra-abdominal organs (S36.-)")

Diagnosis Index entries for S36.400A

• Injury › intestine › small › duodenum

Nearby codes

• S36.39XD Other injury of stomach, subsequent encounter
• S36.39XS Other injury of stomach, sequela
• S36.4 Injury of small intestine
• S36.40 Unspecified injury of small intestine
• S36.400 Unspecified injury of duodenum
• S36.400A Unspecified injury of duodenum, initial encounter (this code)
• S36.400D Unspecified injury of duodenum, subsequent encounter
• S36.400S Unspecified injury of duodenum, sequela
• S36.408 Unspecified injury of other part of small intestine
• S36.408A Unspecified injury of other part of small intestine, initial encounter
• S36.408D Unspecified injury of other part of small intestine, subsequent encounter