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ICD10BillableValid for clinical use

ICD-10 Code K91.1: Postgastric surgery syndromes

K91.1 is a billable ICD-10 diagnosis code used to classify Postgastric surgery syndromes in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).

When is it used?

  • May be used when a clinician documents postgastric surgery syndromes in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
11Diseases of the digestive system (K00-K95)
block
K90-K95Other diseases of the digestive system
category
K91Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
currentK91

Official coding notes

Inclusion terms
  • Dumping syndrome
  • Postgastrectomy syndrome
  • Postvagotomy syndrome

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

GastroenterologistGeneral Physician

Coverage-related procedures and services

CPT 44388high
COLONOSCOPY THROUGH STOMA; DIAGNOSTIC, INCLUDING COLLECTION OF SPECIMEN(S) BY BRUSHING OR WASHING, WHEN PERFORMED (SEPARATE PROCEDURE)
Source: CMS coverage guidance
CPT 44401high
COLONOSCOPY THROUGH STOMA; WITH ABLATION OF TUMOR(S), POLYP(S), OR OTHER LESION(S) (INCLUDES PRE-AND POST-DILATION AND GUIDE WIRE PASSAGE, WHEN PERFORMED)
Source: CMS coverage guidance
CPT 44389high
COLONOSCOPY THROUGH STOMA; WITH BIOPSY, SINGLE OR MULTIPLE
Source: CMS coverage guidance
CPT 44391high
COLONOSCOPY THROUGH STOMA; WITH CONTROL OF BLEEDING, ANY METHOD
Source: CMS coverage guidance
CPT 44408high
COLONOSCOPY THROUGH STOMA; WITH DECOMPRESSION (FOR PATHOLOGIC DISTENTION) (EG, VOLVULUS, MEGACOLON), INCLUDING PLACEMENT OF DECOMPRESSION TUBE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 44404high
COLONOSCOPY THROUGH STOMA; WITH DIRECTED SUBMUCOSAL INJECTION(S), ANY SUBSTANCE
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
K91.1

Common synonyms

Postgastric surgery syndromes

Frequently asked questions

Code details

CodeK91.1
SystemICD10
Display namePostgastric surgery syndromes
ChapterDiseases of the digestive system (K00-K95)
BlockOther diseases of the digestive system

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Achlorhydria, achlorhydric(neurogenic)Complication(s) (from) (of)Complication(s) (from) (of)Complication(s) (from) (of)Complication(s) (from) (of)Diarrhea, diarrheal(disease) (infantile) (inflammatory)Diarrhea, diarrheal(disease) (infantile) (inflammatory)Dumping syndrome(postgastrectomy)Postgastrectomy dumping syndromeSyndromeSyndromeSyndrome

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.