K91 – Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

ICD-10-CM 2027 diagnosis code · Other diseases of the digestive system

Non-billable header

ICD-10-CM code K91

Code: K91 (claims format: K91)
Description: Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
Short description: Intraop and postproc comp and disorders of dgstv sys, NEC
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 11. Diseases of the digestive system (K00-K95)
Block: K90-K95 Other diseases of the digestive system

Billable codes under K91

K91 is a header code and cannot be used on claims. Choose the most specific code:

K91.0 – Vomiting following gastrointestinal surgeryBillable
K91.1 – Postgastric surgery syndromesBillable
K91.2 – Postsurgical malabsorption, not elsewhere classifiedBillable
K91.3 – Postprocedural intestinal obstructionHeader (more codes below)
K91.5 – Postcholecystectomy syndromeBillable
K91.6 – Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedureHeader (more codes below)
K91.7 – Accidental puncture and laceration of a digestive system organ or structure during a procedureHeader (more codes below)
K91.8 – Other intraoperative and postprocedural complications and disorders of digestive systemHeader (more codes below)

Notes for K91

Excludes2 (not included here):

complications of artificial opening of digestive system (K94.-)
complications of bariatric procedures (K95.-)
gastrojejunal ulcer (K28.-)
postprocedural (radiation) retroperitoneal abscess (K68.11)
radiation colitis (K52.0)
radiation gastroenteritis (K52.0)
radiation proctitis (K62.7)

Frequently asked questions

What is ICD-10 code K91?

K91 is the ICD-10-CM code for intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified, in the block K90-K95 (Other diseases of the digestive system).

Is K91 a billable code?

No. K91 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.