Hospitalization for esophageal achalasia in the United States

Table 1 International Classification of Disease, ninth revision procedure and diagnosis codes used to determine surgical procedure categories and complications

	ICD-9 code
Achalasia	530
Heller1	427
Esophagectomy1	42.4, 42.41, 42.42, 42.5, 42.51-59, 42.6, 42.61-69
Esophageal cancer	150, 150.1, 150.2, 150.3, 150.4, 150.5, 150.8, 151
Complications
Pneumonia	481, 482.0-482.4, 482.8-482.9, 483, 484, 485, 486, 507.0, 482.40, 482.41. 482.42, 482.49
Urinary tract infection	997.5, 599.0-599.9
Shock/sepsis	998.0, 995.9, 995.90, 995.91, 995.92, 038
Pulmonary compromise	514, 518.4, 518.5, 518.81, 518.82

¹Indicates procedure codes. ICD-9: International Classification of Disease, ninth revision.