ICD-10-CM > S00-T88 > T80-T88 > T85 > T85.5 > T85.59 > T85.591 T85.591 Other mechanical complication of esophageal anti-reflux device Non-Billable/Non-Specific Codes T85.591A..., initial encounterT85.591D..., subsequent encounterT85.591S..., sequela