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ICD-10 Guide
ICD-10 CodesK21.00

K21.00

Billable

Gastro-esophageal reflux disease with esophagitis, without bleeding

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

Code Description

ICD-10 K21.00 is a billable code used to indicate a diagnosis of gastro-esophageal reflux disease with esophagitis, without bleeding.

Key Diagnostic Point:

Gastro-esophageal reflux disease (GERD) with esophagitis, without bleeding, is a chronic condition characterized by the backward flow of stomach contents into the esophagus, leading to inflammation of the esophageal lining. Clinically, patients may present with symptoms such as heartburn, regurgitation, chest pain, and difficulty swallowing. The anatomy involved includes the lower esophageal sphincter, which may be weakened or dysfunctional, allowing gastric acid to irritate the esophagus. Over time, untreated GERD can lead to complications such as esophagitis, Barrett's esophagus, and esophageal strictures. Diagnosis typically involves a combination of patient history, physical examination, and diagnostic tests such as endoscopy or pH monitoring. The presence of esophagitis is confirmed through endoscopic findings, which may show erythema, edema, or ulceration of the esophageal mucosa. Accurate diagnosis is crucial for effective management and to prevent progression to more severe conditions.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires endoscopic evaluation and symptom correlation.
  • Treatment complexity: May involve lifestyle modifications, medications, and possibly surgical interventions.
  • Documentation requirements: Detailed clinical history and endoscopic findings must be documented.
  • Coding specificity: Requires precise coding to differentiate from other forms of GERD and esophagitis.

Audit Risk Factors

  • Common coding errors: Misclassification of GERD severity or complications.
  • Documentation gaps: Incomplete clinical notes or lack of endoscopic findings.
  • Billing challenges: Denials due to insufficient documentation supporting the diagnosis.

Specialty Focus

Medical Specialties

Primary medical specialty: 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

Secondary specialty: Internal Medicine

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

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

GERD with esophagitis significantly impacts population health, contributing to increased healthcare utilization due to frequent visits for symptom management and potential complications. Quality measures often focus on the effective management of GERD to prevent progression to more severe conditions. Epidemiologically, GERD is prevalent in various populations, with lifestyle factors such as diet and obesity playing a crucial role in its incidence and severity.

ICD-9 vs ICD-10

GERD with esophagitis significantly impacts population health, contributing to increased healthcare utilization due to frequent visits for symptom management and potential complications. Quality measures often focus on the effective management of GERD to prevent progression to more severe conditions. Epidemiologically, GERD is prevalent in various populations, with lifestyle factors such as diet and obesity playing a crucial role in its incidence and severity.

Reimbursement & Billing Impact

Reimbursement considerations include the need for prior authorization for endoscopic procedures and ensuring that documentation supports the medical necessity of the services provided. Common denials may arise from insufficient evidence of esophagitis or failure to document the severity of symptoms. Coding best practices involve using the most specific code available and ensuring that all related services are accurately captured in the billing process.

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 K21.00?

K21.00 covers gastro-esophageal reflux disease with esophagitis that does not involve bleeding. It is characterized by inflammation of the esophagus due to acid reflux, confirmed through endoscopic examination.

When should K21.00 be used instead of related codes?

K21.00 should be used when the patient has GERD with esophagitis but without any evidence of bleeding. If bleeding is present, K21.01 should be selected instead.

What documentation supports K21.00?

Documentation should include a detailed patient history, symptom description, results from endoscopic evaluations showing esophagitis, and any treatment plans initiated.