What is the Medical Glossary?

Browse our complete A-Z glossary of medical terms, drugs, conditions, procedures, hospitals, and healthcare organizations.

What healthcare terms are defined in the MedicalRecords.com glossary?

The MedicalRecords.com glossary covers medical records terminology, healthcare IT acronyms, insurance terms, clinical vocabulary, regulatory terms (HIPAA, HITECH), and EHR/EMR industry definitions. It is designed for patients, healthcare professionals, and technology buyers seeking clear explanations.

What does EMR stand for in healthcare?

EMR stands for Electronic Medical Record. It is a digital version of the paper charts kept in a clinician's office, containing a patient's medical and treatment history from a single practice. Unlike EHRs (Electronic Health Records), EMRs are not typically designed to share information outside the practice.

What is HIPAA and why does it matter for medical records?

HIPAA (Health Insurance Portability and Accountability Act) is a federal law that establishes standards to protect sensitive patient health information. Under HIPAA, patients have the right to access and obtain copies of their medical records, and covered entities must respond to records requests within 30 days.

What is the difference between an EHR and an EMR?

An EMR (Electronic Medical Record) is a digital record used within a single practice. An EHR (Electronic Health Record) is designed to be shared across multiple healthcare settings — different physicians, hospitals, labs, and specialists — giving a broader view of a patient's care history.

Medical Glossary | A-Z Entity Directory

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HCA Healthcare Data Breach (2023)

Event

HCA Healthcare data breach in TN affecting 11,270,000 individuals. Reported 2023-07-31.

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HMG Healthcare, LLC Data Breach (2023)

Event

HMG Healthcare, LLC data breach in TX affecting 80,000 individuals. Reported 2023-12-29.

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HORNE, LLP Data Breach (2024)

Event

HORNE, LLP data breach in MS affecting 170,052 individuals. Reported 2024-01-13.

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Hamilton County Government Data Breach (2025)

Event

Hamilton County Government data breach in TN affecting 14,081 individuals. Reported 2025-04-03.

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Hampton-Newport News Community Services Board Data Breach (2024)

Event

Hampton-Newport News Community Services Board data breach in VA affecting 44,312 individuals. Reported 2024-01-11.

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Harbin Clinic, LLC Data Breach (2025)

Event

Harbin Clinic, LLC data breach in GA affecting 176,149 individuals. Reported 2025-05-16.

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Harbor Data Breach (2025)

Event

Harbor data breach in OH affecting 216,000 individuals. Reported 2025-09-30.

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Harris County Hospital District d/b/a Harris Health System Data Breach (2023)

Event

Harris County Hospital District d/b/a Harris Health System data breach in TX affecting 455,676 individuals. Reported 2023-07-21.

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Harrisburg Medical Center (“HMC”) Data Breach (2023)

Event

Harrisburg Medical Center (“HMC”) data breach in IL affecting 147,826 individuals. Reported 2023-02-21.

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Harvard Pilgrim Health Care Data Breach (2023)

Event

Harvard Pilgrim Health Care data breach in MA affecting 2,624,191 individuals. Reported 2023-05-24.

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Hawaii Radiologic Associates, Ltd. Data Breach (2024)

Event

Hawaii Radiologic Associates, Ltd. data breach in HI affecting 23,205 individuals. Reported 2024-10-25.

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Health & Palliative Services of the Treasure Coast, Inc d/b/a Treasure Coast Hospice (“Treasure Health ”) Data Breach (2025)

Event

Health & Palliative Services of the Treasure Coast, Inc d/b/a Treasure Coast Hospice (“Treasure Health ”) data breach in FL affecting 13,230 individuals. Reported 2025-09-19.

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Health Alliance Hospital Mary's Avenue Campus Data Breach (2023)

Event

Health Alliance Hospital Mary's Avenue Campus data breach in NY affecting 264,197 individuals. Reported 2023-12-11.

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Health Care Management Solutions, LLC Data Breach (2022)

Event

Health Care Management Solutions, LLC data breach in WV affecting 500,000 individuals. Reported 2022-11-14.

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Health Care Service Corporation Data Breach (2023)

Event

Health Care Service Corporation data breach in IL affecting 220,913 individuals. Reported 2023-08-21.

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Health First, Inc. Data Breach (2023)

Event

Health First, Inc. data breach in FL affecting 14,171 individuals. Reported 2023-09-22.

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Health Plan of San Mateo Data Breach (2023)

Event

Health Plan of San Mateo data breach in CA affecting 11,894 individuals. Reported 2023-03-17.

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Health Services LLC Data Breach (2025)

Event

Health Services LLC data breach in OH affecting 75,906 individuals. Reported 2025-04-01.

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HealthEC LLC Data Breach (2023)

Event

HealthEC LLC data breach in NJ affecting 4,452,782 individuals. Reported 2023-12-21.

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HealthEquity, Inc. Data Breach (2024)

Event

HealthEquity, Inc. data breach in UT affecting 4,300,000 individuals. Reported 2024-08-09.

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Healthback Holdings, LLC Data Breach (2022)

Event

Healthback Holdings, LLC data breach in OK affecting 21,114 individuals. Reported 2022-07-29.

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Healthcare Therapy Services, Inc. Data Breach (2025)

Event

Healthcare Therapy Services, Inc. data breach in IN affecting 15,027 individuals. Reported 2025-11-08.

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Healthy Options dba Postal Prescription Services – Kroger Data Breach (2023)

Event

Healthy Options dba Postal Prescription Services – Kroger data breach in OH affecting 82,466 individuals. Reported 2023-03-15.

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Heart of Texas Behavioral Health Network Data Breach (2023)

Event

Heart of Texas Behavioral Health Network data breach in TX affecting 63,776 individuals. Reported 2023-12-12.

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Heart to Heart Hospice Holdings, LLC Data Breach (2025)

Event

Heart to Heart Hospice Holdings, LLC data breach in TX affecting 19,034 individuals. Reported 2025-03-18.

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Heartland Alliance Data Breach (2022)

Event

Heartland Alliance data breach in IL affecting 46,694 individuals. Reported 2022-11-08.

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Heartland Health Center Data Breach (2025)

Event

Heartland Health Center data breach in NE affecting 43,728 individuals. Reported 2025-10-17.

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Heartland Regional Medical Center d/b/a Mosaic Life Care Data Breach (2025)

Event

Heartland Regional Medical Center d/b/a Mosaic Life Care data breach in MO affecting 145,269 individuals. Reported 2025-06-27.

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Hi-School Pharmacy Data Breach (2023)

Event

Hi-School Pharmacy data breach in WA affecting 12,779 individuals. Reported 2023-12-05.

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Highlands Oncology Group PA Data Breach (2023)

Event

Highlands Oncology Group PA data breach in AR affecting 55,297 individuals. Reported 2023-12-22.

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Highlands Oncology Group PA Data Breach (2025)

Event

Highlands Oncology Group PA data breach in AR affecting 111,766 individuals. Reported 2025-08-01.

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Highmark Inc Data Breach (2023)

Event

Highmark Inc data breach in PA affecting 36,600 individuals. Reported 2023-02-10.

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Hillcrest Convalescent Center, Inc. Data Breach (2025)

Event

Hillcrest Convalescent Center, Inc. data breach in NC affecting 106,194 individuals. Reported 2025-03-04.

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Hillsborough County, Florida (County Government) Data Breach (2023)

Event

Hillsborough County, Florida (County Government) data breach in FL affecting 70,636 individuals. Reported 2023-07-26.

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Hope Health Systems Inc. Data Breach (2022)

Event

Hope Health Systems Inc. data breach in MD affecting 9,972 individuals. Reported 2022-11-21.

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Horizon Healthcare RCM Data Breach (2025)

Event

Horizon Healthcare RCM data breach in IN affecting 210,901 individuals. Reported 2025-06-27.

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Hospital & Medical Foundation of Paris, Inc Data Breach (2023)

Event

Hospital & Medical Foundation of Paris, Inc data breach in IL affecting 16,598 individuals. Reported 2023-10-19.

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Howard Brown Health Data Breach (2025)

Event

Howard Brown Health data breach in IL affecting 8,357 individuals. Reported 2025-12-19.

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Howard Memorial Hospital Data Breach (2023)

Event

Howard Memorial Hospital data breach in AR affecting 53,668 individuals. Reported 2023-01-27.

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Hunter Health Clinic Data Breach (2025)

Event

Hunter Health Clinic data breach in KS affecting 28,431 individuals. Reported 2025-05-15.

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Huron Regional Medical Center, Inc. Data Breach (2025)

Event

Huron Regional Medical Center, Inc. data breach in SD affecting 25,398 individuals. Reported 2025-06-06.

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Hutchinson Clinic, P.A. Data Breach (2023)

Event

Hutchinson Clinic, P.A. data breach in KS affecting 100,000 individuals. Reported 2023-02-17.

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Hypertension-Nephrology Associates, P.C. Data Breach (2024)

Event

Hypertension-Nephrology Associates, P.C. data breach in PA affecting 39,491 individuals. Reported 2024-05-14.

Medical Glossary

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H

HCA Healthcare Data Breach (2023)

HMG Healthcare, LLC Data Breach (2023)

HORNE, LLP Data Breach (2024)

Hamilton County Government Data Breach (2025)

Hampton-Newport News Community Services Board Data Breach (2024)

Harbin Clinic, LLC Data Breach (2025)

Harbor Data Breach (2025)

Harris County Hospital District d/b/a Harris Health System Data Breach (2023)

Harrisburg Medical Center (“HMC”) Data Breach (2023)

Harvard Pilgrim Health Care Data Breach (2023)

Hawaii Radiologic Associates, Ltd. Data Breach (2024)

Health & Palliative Services of the Treasure Coast, Inc d/b/a Treasure Coast Hospice (“Treasure Health ”) Data Breach (2025)

Health Alliance Hospital Mary's Avenue Campus Data Breach (2023)

Health Care Management Solutions, LLC Data Breach (2022)

Health Care Service Corporation Data Breach (2023)

Health First, Inc. Data Breach (2023)

Health Plan of San Mateo Data Breach (2023)

Health Services LLC Data Breach (2025)

HealthEC LLC Data Breach (2023)

HealthEquity, Inc. Data Breach (2024)

Healthback Holdings, LLC Data Breach (2022)

Healthcare Therapy Services, Inc. Data Breach (2025)

Healthy Options dba Postal Prescription Services – Kroger Data Breach (2023)

Heart of Texas Behavioral Health Network Data Breach (2023)

Heart to Heart Hospice Holdings, LLC Data Breach (2025)

Heartland Alliance Data Breach (2022)

Heartland Health Center Data Breach (2025)

Heartland Regional Medical Center d/b/a Mosaic Life Care Data Breach (2025)

Hi-School Pharmacy Data Breach (2023)

Highlands Oncology Group PA Data Breach (2023)

Highlands Oncology Group PA Data Breach (2025)

Highmark Inc Data Breach (2023)

Hillcrest Convalescent Center, Inc. Data Breach (2025)

Hillsborough County, Florida (County Government) Data Breach (2023)

Hope Health Systems Inc. Data Breach (2022)

Horizon Healthcare RCM Data Breach (2025)

Hospital & Medical Foundation of Paris, Inc Data Breach (2023)

Howard Brown Health Data Breach (2025)

Howard Memorial Hospital Data Breach (2023)

Hunter Health Clinic Data Breach (2025)

Huron Regional Medical Center, Inc. Data Breach (2025)

Hutchinson Clinic, P.A. Data Breach (2023)

Hypertension-Nephrology Associates, P.C. Data Breach (2024)