National Ambulatory Medical Care Survey (NAMCS) and National Hospital Ambulatory Medical Care Survey (NHAMCS) Restricted Variables

The majority of NAMCS/NHAMCS variables are publicly available and researchers are highly encouraged to conduct preliminary analyses using these data. Researchers interested in accessing and/or conducting analyses using restricted NAMCS/NHAMCS variables must seek RDC approval. As part of the approval process, researchers are required to have a proposal approved by the RDC. Each proposal must include a data dictionary that describes the variables needed for analysis. Below is a list of the standard restricted variables. Please use this list when creating the data dictionary for your RDC Proposal.

NAMCS and NHAMCS Restricted Data pdf icon[PDF – 37 KB]

If you are interested in using variables from NAMCS/NHAMCS that are not on the public files nor listed on the above file, please send an inquiry to In your email, include a list of questions from the survey instrument for which you were unable to find the corresponding variables. Proposals requesting these types of variables should not be submitted without first contacting

Page last reviewed: November 19, 2021, 09:01 AM