Diagnostic code
530 — Diseases of Esophagus, Stomach and Duodenum: Esophagitis, cardiospasm, ulcer of esophagus; stricture, stenosis, or obstruction of esophagus
530 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Diseases of Esophagus, Stomach and Duodenum: Esophagitis, cardiospasm, ulcer of esophagus; stricture, stenosis, or obstruction of esophagus.
- Code
- 530
- Description
- Diseases of Esophagus, Stomach and Duodenum: Esophagitis, cardiospasm, ulcer of esophagus; stricture, stenosis, or obstruction of esophagus
Updated October 26, 2026
530 is the OHIP diagnostic code for esophagitis and other diseases of the esophagus, the code that fits reflux disease (GERD).
Conditions billed under this code
- GERD
What it covers
The Ministry lists 530 as 'Esophagitis, cardiospasm, ulcer of esophagus; stricture, stenosis, or obstruction of esophagus' under Diseases of Esophagus, Stomach and Duodenum.
The list doesn't name reflux. In ICD-9, the system the list is based on, gastro-esophageal reflux is filed under 530, so 530 fits GERD and reflux esophagitis.
For heartburn not yet diagnosed, 787 (which names heartburn) fits. Indigestion or dyspepsia is 536, gastritis 535, a stomach or duodenal ulcer 531 or 532, and a hiatus hernia 553.
Related codes: 787, 536, 535, 531, 532, 553
Sources
APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing