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ICD-10 Coding for Gastroesophageal Reflux Disease(K21.0, K21.9, K21.01)

Complete ICD-10-CM coding and documentation guide for Gastroesophageal Reflux Disease. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

GERDAcid Reflux

Related ICD-10 Code Ranges

Complete code families applicable to Gastroesophageal Reflux Disease

K20-K31Primary Range

Diseases of esophagus, stomach and duodenum

This range includes codes for GERD and related esophageal conditions.

Barrett's esophagus

Used when Barrett's esophagus is present with GERD.

Diaphragmatic hernia

Includes hiatal hernia, which can be associated with GERD.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
K21.0Gastro-esophageal reflux disease with esophagitisUse when endoscopy confirms esophagitis in GERD patients.
  • Endoscopic confirmation of esophagitis
K21.9Gastro-esophageal reflux disease without esophagitisUse when GERD symptoms are present but esophagitis is not confirmed.
  • Symptoms of GERD without endoscopic evidence of esophagitis
K21.01Gastro-esophageal reflux disease with esophagitis and bleedingUse when GERD is complicated by bleeding esophagitis.
  • Endoscopic evidence of esophagitis with bleeding

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for GERD with esophagitis

Essential facts and insights about Gastroesophageal Reflux Disease

The ICD-10 code for GERD with esophagitis is K21.0, requiring endoscopic confirmation of esophagitis.

Primary ICD-10-CM Codes for gastroesophageal reflux disease

Gastro-esophageal reflux disease with esophagitis
Non-billable Code

Decision Criteria

clinical Criteria

  • Endoscopic evidence of esophagitis

Applicable To

  • Reflux esophagitis

Excludes

  • Barrett's esophagus (K22.7)

Clinical Validation Requirements

  • Endoscopic confirmation of esophagitis

Code-Specific Risks

  • Incorrectly coding without endoscopic evidence

Coding Notes

  • Ensure endoscopic findings are documented to support this code.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Diaphragmatic hernia

K44.-
Use if hiatal hernia is present with GERD.

Heartburn

R12
Use if heartburn is a primary symptom without confirmed GERD.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Gastro-esophageal reflux disease without esophagitis

K21.9
Use when GERD is present without endoscopic evidence of esophagitis.

Functional dyspepsia

K30
Use when symptoms are more indicative of dyspepsia than GERD.

Gastrointestinal hemorrhage, unspecified

K92.2
Use for unspecified GI bleeding not directly linked to GERD.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Gastroesophageal Reflux Disease to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code K21.0.

Impact

Clinical: May lead to misdiagnosis or inappropriate treatment., Regulatory: Non-compliance with documentation standards., Financial: Potential for claim denials or reduced reimbursement.

Mitigation Strategy

Use specific terms like 'erosive esophagitis', Document diagnostic test results

Impact

Reimbursement: Incorrect coding may lead to denied claims., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation Strategy

Verify endoscopic findings and use K21.0 if esophagitis is present.

Impact

Using non-specific codes when detailed codes are available.

Mitigation Strategy

Regular training and audits of coding practices.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Gastroesophageal Reflux Disease, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Gastroesophageal Reflux Disease

Use these documentation templates to ensure complete and accurate documentation for Gastroesophageal Reflux Disease. These templates include all required elements for proper coding and billing.

GERD with esophagitis

Specialty: Gastroenterology

Required Elements

  • Symptom duration
  • Endoscopy findings
  • Presence of bleeding

Example Documentation

Patient presents with chronic heartburn. Endoscopy reveals LA Grade B esophagitis. No bleeding observed.

Examples: Poor vs. Good Documentation

Poor Documentation Example
GERD symptoms, treat with PPI.
Good Documentation Example
GERD with LA Grade A esophagitis on EGD (5/2025). No Barrett’s. Current PPI therapy with partial symptom control.
Explanation
The good example provides specific endoscopic findings and treatment details.

Need help with ICD-10 coding for Gastroesophageal Reflux Disease? Ask your questions below.

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