Glossary of Health Care and Medical Terms

In many cases,
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For MIPPA Medicare eRx incentive program, G-code G8553 is the requireded numerator billing codes

Georgia Health Information Technology Regional Extension Center (GA_HITREC) is a federally funded program, at the National Center for Primary Care, designed to assist Georgia
Also see: REC

General Equivalence Mappings (GEMs) were designed as a general purpose translation tool that can be used by anyone who wants to convert coded data.

GEMs were developed by CMS and CDC, with input from Cooperating Parties:


  • American Hospital Association (AHA)

  • American Health Information Management Association (AHIMA) and

  • the team that developed and maintains ICD-10-PCS.


The GEMs are a tool to assist with converting larger ICD-9-CM databases to ICD-10-CM and ICD-10-PCS. For example, GEMs are used to:

  • Convert Medicare Severity-Diagnosis Related Groups (MS-DRGs) from an ICD-9-CM-based application to an ICD-10-CM/PCS-based application;

  • Convert the Medicare Code Editor to a native ICD-10-CM/PCS-based application; and

  • Produce a purpose-built ICD-10-CM/PCS to ICD-9-CM crosswalk for reimbursement called the “ICD-10 Reimbursement Mappings."


Also see: ICD-10-CM, ICD-10-PCS

Glasgow Coma Scale(GCS) is a neurological scale for recording the conscious state of an individual in a reliable, objective way

A Goniometer is device used to measure angles. Goniometers are most frequently used in medicine to determine range of motion in a patient's joint. For instance, an injured person may lose some flexibility because of an accident. Goniometers aid in chiropractic practices, physical therapy and the military, as well as to rotate objects in space.

Some electronic medical records (EMR) / electronic health record (EHR) systems come equipped with an interface to Electronic Goniometers that have graphical displays and documentation features.

The Geographic Practice Cost Index (GPCI) was implemented by the Centers for Medicare and Medicaid Services (CMS) as part of the Medicare physician fee schedule in 1992 and federal statute requires CMS to update the GPCI at least every three years. Locality GPCIs for CY 2012 will be calculated using 2006-based Medicare Economic Index (MEI) cost share weights and using American Community Survey (ACS) data to calculate the office rent index.

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