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Bariatric Surgery per 100,000 Medicare Enrollees
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        • FOOTNOTES:
        • After establishing our inclusion criteria, we examined the incidence of each event over time between 2001 and 2011. We assessed rates by each year individually. These rates were adjusted for changes in age, sex, and race occurring over time using the population during the year 2001 as the standard population.

        • DENOMINATOR DEFINITION:
        • The denominator consisted of the number of beneficiaries eligible for Medicare Parts A and B as of June 30 for each year (a mid-year denominator).

        • NUMERATOR DEFINITION:
        • Gastric bypass: ICD-9 procedure codes 44.3, 44.31, 44.38, 44.39; CPT codes 43846, 43847, 43644, 43645, 43844, 43659, S2085.
          Adjustable gastric banding: ICD-9 procedure code 44.95; CPT codes 43770, S2082.
          Other procedure: ICD-9 procedure codes 43.89, 43.82, 44.68, 45.51, 45.9; CPT codes 43842, 43843, 43845, 43775.
          All require primary/secondary diagnosis of morbid obesity (ICD-9 codes 278.0, 278.00, 278.01, V77.8) and DRG code for weight loss surgery (DRG 288: MSDRG 619-621)




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    The Dartmouth Atlas of Health Care is based at The Dartmouth Institute for Health Policy and Clinical Practice and is supported by a coalition of funders led by the Robert Wood Johnson Foundation, including the WellPoint Foundation, the United Health Foundation, the California HealthCare Foundation, and the Charles H. Hood Foundation.