Beschreibung:
<jats:title>Abstract</jats:title><jats:sec><jats:title>Purpose</jats:title><jats:p>To quantify the sensitivity and positive predictive value (PPV) of body mass index (BMI)‐related ICD‐9‐CM and ICD‐10‐CM diagnosis codes in claims data.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>De‐identified electronic health record (EHR) and claims data were obtained from the Optum Integrated Claims‐Clinical Database for cross‐sections of commercial and Medicare Advantage health plan members age ≥ 20 years in 2013, 2014, and 2016. In each calendar year, health plan members' BMI as coded in the insurance claims data (error‐prone measure) was compared with their BMI as recorded in the EHR (gold standard) to estimate the sensitivity and PPV of BMI‐related ICD‐9‐CM and ICD‐10‐CM diagnosis codes. The unit of analysis was the person‐year.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>The study sample included 746 763 distinct health plan members who contributed 1 116 283 eligible person‐years (median age 56 years; 57% female; 65% commercially insured and 35% with Medicare Advantage). BMI‐related diagnoses were coded for 14.6%. The sensitivity of BMI‐related diagnoses codes for the detection of underweight, normal weight, overweight, and obesity was 10.1%, 3.7%, 6.0%, and 25.2%, and the PPV was 49.0% for underweight, 89.6% for normal weight, 73.4% for overweight, and 92.4% for obesity, respectively. The sensitivity of BMI‐related diagnosis codes was higher in the ICD‐10‐CM era relative to the ICD‐9‐CM era.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>The PPV of BMI‐related diagnosis codes for normal weight, overweight, and obesity was high (>70%) but the sensitivity was low (<30%). BMI‐related diagnoses were more likely to be coded in patients with class II or III obesity (BMI ≥35 kg/m<jats:sup>2</jats:sup>), and in 2016 relative to 2013 or 2014.</jats:p></jats:sec>