BackgroundMalnutrition remains a significant problem in patients with acute or chronic illnesses. Nutrition assessment is an important component in detecting malnutrition; but not always performed using a standardized tool. This survey on nutrition assessment evaluates current clinical practices on the assessment, diagnosis, and treatment of malnutrition.MethodsThis 2022 survey of US‐based nutrition clinicians collected data on assessment parameters used in hospitals, long‐term care facilities, and the home care setting.ResultsA total of 686 surveys were available for analysis. Ninety‐seven percent of adult and 91% of pediatric responding clinicians indicated that a dietitian completed the assessment. Parameters used most frequently among adult clinician respondents included nutrient intake, current weight, and weight history, those used by pediatric clinician respondents included nutrient intake, weight‐for‐age z score, and weight‐for‐length/height z score. Eighty‐nine percent of adult clinicians in all care settings and 85% of pediatric clinicians use the Academy of Nutrition and Dietetics/American Society for Parenteral and Enteral Nutrition Indicators of Malnutrition (AAIM). Respondents reported malnutrition rates of 32%–40% for adults and 4%–30% for pediatric patients, depending on the setting. Appropriate interventions for those with malnutrition (as perceived by the survey respondents) were ordered 70% of the time.ConclusionThis survey demonstrated significant use of the AAIM by both adult and pediatric clinicians across care settings. Reported malnutrition rates are consistent with others published in the literature. The authors suggest that quality improvement efforts should focus on the 30% of patients with malnutrition but without a reported appropriate nutrition intervention.