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ICD-10-CM Diagnosis Codes →
section notes
11. Diseases of the digestive system (K00-K95) →
section notes
K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31) →
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K21 Gastro-esophageal reflux disease →
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K21.00‑K21.01   K21.0 Gastro-esophageal reflux disease with esophagitis
K21.9   Gastro-esophageal reflux disease without esophagitis
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