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ICD-10 Guide
DiagnosesAcute On Chronic Cholecystitis

Acute On Chronic Cholecystitis

ICD-10 Coding for Acute on Chronic Cholecystitis(K81.2, K80.0-)

PRIMARY SPECIALTYSurgery
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Acute On Chronic Cholecystitis?
Essential facts and insights about Acute on Chronic Cholecystitis

Key Clinical Considerations:

  • Patients typically present with right upper quadrant pain, nausea, vomiting, and fever.
  • Laboratory findings may include elevated white blood cell count (WBC), liver function tests, and bilirubin levels.
  • Physical examination may reveal tenderness in the right upper quadrant, Murphy's sign, and possible jaundice.
  • Imaging findings may include gallstones on ultrasound, thickened gallbladder wall, and pericholecystic fluid.
  • Severity criteria may involve the presence of complications such as perforation or abscess formation.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the patient's symptoms, duration, and severity of the condition.
  • Specific terminology such as 'acute on chronic cholecystitis' must be used to ensure clarity.
  • Examples include noting the presence of gallstones and any previous episodes of cholecystitis.
  • Documentation must demonstrate medical necessity for surgical intervention or imaging studies.
  • Quality measures may include tracking the time to surgery and post-operative complications.

Coding Guidelines

Usage Guidelines & Examples

  • Use this diagnosis code when a patient has a history of chronic cholecystitis with an acute exacerbation.
  • Do not use this code for patients with only chronic cholecystitis or acute cholecystitis without chronic history.
  • Related codes include K80.0 for cholelithiasis without cholecystitis and K81.0 for acute cholecystitis.
  • Common errors include misclassifying acute cholecystitis as acute on chronic without proper documentation.
  • In complex cases, ensure to document the timeline of symptoms and previous treatments to support code selection.

Code Exclusions

Important Exclusions

  • Excludes conditions such as chronic cholecystitis without acute exacerbation.
  • Alternative codes for excluded conditions include K81.0 for acute cholecystitis.
  • Conditions are excluded to ensure accurate representation of the patient's clinical status.
  • Common mistakes include coding acute cholecystitis without noting the chronic history.
  • Related but distinct conditions include acute pancreatitis and biliary colic.

Related ICD-10 Codes

Primary Codes
K81.2
Acute on chronic cholecystitis
K80.0
Cholelithiasis without cholecystitis
Differential Codes
K80.0-
K81.2
K81.2
when no stones are present.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Surgery

Specialty Applications

  • This diagnosis applies to patients with a history of gallbladder disease and acute symptoms.
  • Patient populations include adults, particularly those with risk factors such as obesity and female gender.
  • Clinical settings include inpatient surgical units and emergency departments.
  • Specialty-specific applications are relevant in surgical and gastroenterology practices.
  • Treatment contexts include pre-operative assessment and post-operative care.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with acute on chronic cholecystitis based on clinical findings of right upper quadrant pain and imaging results.'

Template 2

Template: 'Clinical presentation consistent with acute on chronic cholecystitis including fever and elevated WBC count.'

Template 3

Template: 'Diagnostic criteria met as evidenced by ultrasound showing gallstones and thickened gallbladder wall.'

Template 4

Template: 'Treatment plan initiated for acute on chronic cholecystitis with laparoscopic cholecystectomy scheduled.'

Template 5

Template: 'Follow-up care for acute on chronic cholecystitis including monitoring for post-operative complications.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation must include clinical findings, imaging results, and treatment plans.

How does this differ from similar diagnoses?

Acute on chronic cholecystitis involves a history of chronic disease with an acute episode, unlike isolated acute cholecystitis.

What are common billing considerations?

Ensure that documentation supports the medical necessity for surgery and any imaging studies.

What procedures are typically associated?

Commonly associated CPT codes include cholecystectomy and imaging studies like ultrasound.

Are there any quality reporting implications?

Quality measures may include tracking surgical outcomes and complications related to the diagnosis.