• Amanda S Weissman, Varun Ranpariya, Alan B Fleischer, and Steven R Feldman.
• Center for Dermatology Research, Department of Dermatology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA. Electronic address: a.weissman44@gmail.com.
• J Natl Med Assoc. 2021 Oct 1; 113 (5): 504-514.

BackgroundHealthcare disparities negatively impact patient health outcomes; addressing disparities could improve quality of life and decrease overall healthcare cost. The National Ambulatory Medical Care Survey (NAMCS) is an objective and reliable source for collecting information on United States (U.S.) ambulatory medical care service visits and may be a useful tool for identifying potential disparities in care.ObjectiveThe purpose of this literature review is to describe studies utilizing NAMCS to capture U.S. healthcare disparities.MethodsPubMed was searched for scientific articles that utilized NAMCS to determine health disparities in the U.S. The keywords queried included "NAMCS" or "National Ambulatory Medical Care Survey" and "disparity" or "disparities" as a pair or additionally paired with one of the following: "race", "ethnicity", "age", "gender", "geography", or "insurance".Results66 studies were found that incorporated NAMCS data from 1980-2016 into their methods to measure outcomes relating to health disparities. Disparities were found in the following categories: race/ethnicity, geographic location, age, insurance type, gender, specialist care versus primary care, body habitus, and preexisting conditions affecting patient outcomes. Disparities were identified in pain management, neurology, dermatology, psychiatry, patient communication access, and non-specialty specific or primary care visits related to disease conditions, screening, and treatment plans.LimitationsOnly PubMed was utilized as a search engine and may not encompass all studies on NAMCS and health disparities. NAMCS is a cross-sectional database and does not allow for longitudinal analyses.ConclusionsNAMCS may be an underused tool given the limited number of articles that identify health disparities using it. Research studies utilizing NAMCS may identify potential disparities ultimately leading to better healthcare outcomes.Copyright © 2021 National Medical Association. Published by Elsevier Inc. All rights reserved.

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