B18zip

: Researchers use this field to identify the geographic location of survey participants during the initial "Baseline" phase of a study cohort. Context within HOS Data

The HOS program is used by the Centers for Medicare & Medicaid Services (CMS) to gather data on the quality of care provided by Medicare Advantage Organizations (MAOs). B18zip

: The name typically stands for "Cohort 18 Baseline ZIP Code" . : Researchers use this field to identify the

: You may see it alongside other coded fields like F18PBPID (Plan Benefit Package ID) or STATE in the HOS Data User’s Guide . : You may see it alongside other coded

: It is a character field (usually 22 characters in length) found in research files like the Baseline Research Identifiable File (RIF) or Limited Data Set (LDS) .

"B18zip" is a specific data field label used in medical health research datasets, most notably in the documentation .