2027 ICD-10-CM Diagnosis Code K91.89Other postprocedural complications and disorders of digestive system
ICD-10-CM Codes›K00–K95›K90-K95›K91
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
K91.89 is a billable ICD-10-CM diagnosis code for other postprocedural complications and disorders of digestive system. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 70 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative digestive system complication.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abnormal gastric motility
- Anastomotic biliary stricture
- Anastomotic necrosis of small intestine
- Anastomotic stricture of small intestine
- Anorectal stricture
- Bile duct leakage
- Bile leakage after removal of T-tube
- Bile peritonitis
- Biliary anastomotic leak
- Biliary stricture
- Burn of colon
- Chronic pain following cholecystectomy
- Cirrhosis of liver due to and following cardiac procedure
- Crohn's disease of gastrointestinal anastomosis
- Delayed gastric emptying
- Delayed gastric emptying following procedure
- Diarrhea after gastrointestinal tract surgery
- Diarrhea and vomiting after gastrointestinal tract surgery
- Disorder of anastomosis of biliary tract
- Disorder of gastrointestinal anastomosis
- Disorder of pancreatic duct anastomosis
- Duodenal anastomotic dehiscence
- Duodenal anastomotic leak
- Duodenal stump leak
- Dysmotility of stomach
- Erosion of gastrointestinal anastomosis
- Esophageal anastomotic leak
- Esophageal anastomotic necrosis
- Esophageal anastomotic stricture
- Failed laparoscopic cholecystectomy
- Failed pancreatogram
- Fontan-associated liver disease
- Foreign body granuloma of intestine
- Gastric anastomotic stricture
- Gastric motor function disorder
- Gastric retention
- Gastrointestinal anastomotic dehiscence
- Gastrointestinal anastomotic leak
- Gastrointestinal anastomotic necrosis
- Gastrointestinal anastomotic tumor recurrence
- Gastrointestinal anastomotic ulcer due to Crohn disease
- Gastrointestinal complication of procedure
- Gastrointestinal complications of care
- Gastroparesis syndrome
- Granuloma of intestine
- Injury of salivary apparatus
- Injury of salivary gland
- Large intestine anastomotic dehiscence
- Leakage from pyloroplasty
- Leakage of bile
- Leakage of bile from choledochotomy
- Low anterior resection syndrome
- Megaloblastic anemia due to gastrectomy
- Nasogastric tube esophagitis
- Pancreatic duct anastomotic stricture
- Peptic anastomotic ulcer
- Peripheral nerve disorder associated with repair of hernia
- Phytobezoar
- Polypectomy scar of large intestine
- Post polypectomy syndrome
- Post-cholecystectomy bile leakage
- Postcholecystectomy bile peritonitis
- Post-ERCP acute pancreatitis
- Postgastrectomy gastritis
- Postgastrectomy phytobezoar
- Postoperative acute pancreatitis
- Postoperative biliary stricture
- Postoperative constipation
- Postoperative esophagitis
- Postoperative gastric retention
- Postoperative peritonitis
- Postoperative stricture
- Postoperative vomiting
- Postprocedural bile duct leakage
- Postsurgical gastroparesis
- Post-vagotomy dysphagia
- Rectal stump leak
- Salivary dysfunction caries following radiotherapy
- Salivary dysfunction dental caries
- Small intestine anastomotic dehiscence
- Small intestine anastomotic leak
- Stenosis of bile duct
- Stenosis of jejunum
- Stenosis of rectum
- Stricture of anastomosis of gastrointestinal tract
- Stricture of anastomosis of intestine
- Stricture of bile duct
- Stricture of biliary-enteric anastomosis
- Stricture of hepatic duct
- Stricture of hepaticojejunal anastomosis
- Stricture of jejunum
- Stricture of rectum
- Stricture of rectum caused by ionizing radiation
- Stricture of small intestine
- Suture granuloma
- Suture granuloma of intestine
- Vomiting after gastrointestinal tract surgery
- Xerostomia
- Xerostomia caused by ionizing radiation
- Xerostomia following radiotherapy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K91.89: its own notes plus those printed at K91 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- postprocedural retroperitoneal abscess (K68.11)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code, if applicable, to further specify disorder
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name K91.89, its category, or a range that includes it.
Excludes2 1
These codes carry an Excludes2 note naming K91.89: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
anastomosis (and bypass) See Also: Complications, prosthetic device or implant;
intestinal (internal) NEC K91.89
specified NEC K91.89
postprocedural See Also: Complications, surgical procedure;
digestive K91.89
Disorder (of) See Also: Disease;
Parotitis, parotiditis (allergic) (nonspecific toxic) (purulent) (septic) (suppurative) See Also: Sialoadenitis;
postoperative K91.89
surgical K91.89
Stricture See Also: Stenosis;
Syndrome See Also: Disease;
afferent loop NEC K91.89
post-polypectomy coagulation K91.89
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
After Surgery
After any operation, you'll have some side effects. There is usually some pain with surgery. There may also be swelling and soreness around the area that the surgeon cut. Your surgeon can tell you which side effects to expect.
Read the full article at MedlinePlus
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Convert K91.89 to ICD-9-CMHistory
Code HistoryHistory
Questions About K91.89Overview
What is the ICD-10 code for other postprocedural complications and disorders of digestive system?
The ICD-10-CM code for other postprocedural complications and disorders of digestive system is K91.89 (sometimes written as K9189). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K91.89 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other postprocedural complications and disorders of digestive system on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K91.89 group to?
When other postprocedural complications and disorders of digestive system is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 394, 395, 393, with relative weights from 0.6379 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K91.89 a CC or MCC?
CMS lists K91.89 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 70 closely related codes in its exclusion list.
Does K91.89 need an additional code?
When the condition applies, yes. The Use Additional Code note reads: code, if applicable, to further specify disorder. The additional code is reported after K91.89.
