Inpatient hospitalizations for ambulatory care sensitive conditions (ACSC) among beneficiaries with and without intellectual and developmental disabilities (IDD) were examined using Medicaid and commercial claims from 2010-2014 in New Hampshire. IDD was defined with International Classification of Diseases, Ninth Edition, Clinical Modification (ICD-9-CM) codes using algorithms from the Centers for Medicare and Medicaid Services, and inpatient encounters were identified using the Healthcare Effectiveness Data and Information Set. In adjusted analyses, beneficiaries with IDD had more hospitalizations for ACSC than those without IDD in both insurance groups. Differences in patterns of ACSC prevalence, comorbidities, and hospital admissions between the commercially and Medicaid-insured groups show the value of using all-payer claims data, when possible, to understand health needs and health care utilization of insurance beneficiaries with IDD.
