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ICD-10 Guide
ICD-10 CodesK81.9

K81.9

Billable

Cholecystitis, unspecified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 K81.9 is a billable code used to indicate a diagnosis of cholecystitis, unspecified.

Key Diagnostic Point:

Cholecystitis, unspecified, refers to inflammation of the gallbladder that is not specified as acute or chronic. The gallbladder, a small organ located beneath the liver, plays a crucial role in the digestive system by storing bile, which helps in the digestion of fats. Clinical presentation may include abdominal pain, particularly in the right upper quadrant, nausea, vomiting, and fever. The disease can progress from mild inflammation to severe complications such as perforation or abscess formation if left untreated. Diagnostic considerations include imaging studies such as ultrasound or CT scans to visualize gallbladder inflammation and rule out other conditions. Laboratory tests may reveal elevated white blood cell counts and liver function tests may indicate biliary obstruction. Accurate diagnosis is essential for appropriate management, which may range from conservative treatment to surgical intervention, such as cholecystectomy, depending on the severity and underlying cause of the inflammation.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity
  • Treatment complexity
  • Documentation requirements
  • Coding specificity

Audit Risk Factors

  • Common coding errors
  • Documentation gaps
  • Billing challenges

Specialty Focus

Medical Specialties

Gastroenterology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

General Surgery

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related ICD-10 Codes

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Cholecystitis, particularly when unspecified, can significantly impact patient health outcomes and healthcare utilization. It is a common condition that may lead to increased emergency department visits and hospital admissions if not managed appropriately. Understanding the epidemiology of cholecystitis helps in developing quality measures aimed at reducing complications and improving patient care. Effective management of this condition can lead to better population health outcomes and reduced healthcare costs.

ICD-9 vs ICD-10

Cholecystitis, particularly when unspecified, can significantly impact patient health outcomes and healthcare utilization. It is a common condition that may lead to increased emergency department visits and hospital admissions if not managed appropriately. Understanding the epidemiology of cholecystitis helps in developing quality measures aimed at reducing complications and improving patient care. Effective management of this condition can lead to better population health outcomes and reduced healthcare costs.

Reimbursement & Billing Impact

Reimbursement considerations may vary based on the severity of the condition and the treatment provided.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for K00-K99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for K00-K99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by K81.9?

K81.9 covers unspecified cholecystitis, which may include cases where the inflammation is not clearly defined as acute or chronic. It is important to differentiate it from other biliary conditions such as choledocholithiasis or pancreatitis.

When should K81.9 be used instead of related codes?

K81.9 should be used when the clinical documentation does not specify the type of cholecystitis. If the condition is clearly acute or chronic, the more specific codes K81.0 or K81.1 should be utilized.

What documentation supports K81.9?

Documentation should include clinical findings, imaging results, laboratory tests, and any treatment plans. Clear notes on the patient's symptoms and the physician's assessment are crucial for supporting the use of K81.9.