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Table 1 Procedures and ICD-9-CM codes used to define infants with surgical NEC

From: Long term healthcare costs of infants who survived neonatal necrotizing enterocolitis: a retrospective longitudinal study among infants enrolled in Texas Medicaid

Surgical procedures ICD-9-CM Codes
Intestinal resection procedures 45.02-3, 45.1, 45.29, 45.3-4, 45.41, 45.49, 45.50-2, 45.60-3,
45.70-9, 45.8, 46.99
Procedures related to stoma creation 46.0 – 46.64
Intestinal anastomosis 45.9 – 94, 46.73-79, 46.93-4
Exploratory laparotomy 45.0, 45.00, 54.11
Percutaneous abdominal drainage 54.91