Medical Dictionary
- United States Department of Human Services
- United States Department of Veterans Affairs
- United States Dept. of Health and Human Services
- United States Environmental Protection Agency
- United States Federal Trade Commission
- United States Food and Drug Administration
- United States Food, Drug Administration
- United States Health Care Financing Administration
- United States Health Insurance Portability and Accountability Act
- United States Health Resources Administration
- United States Health Resources and Services Administration
- United States Health Services and Mental Health Administration
- United States Indian Health Service
- United States National Academy of Sciences
- United States National Center for Health Statistics
- United States National Health Planning Information Center
- United States National Institute of Mental Health
- United States National Institutes of Health
- United States National Library of Medicine
- United States Occupational Health Administration
- United States Occupational Safety Administration
- United States Occupational Safety and Health Administration
- United States Occupational Safety, Health Administration
- United States Office of Economic Opportunity
- United States Office of Research Integrity
- United States Office of Technology Assessment
- United States Office of the Assistant Secretary for Health Office of Research Integrity
- United States Public Health Service
- United States Social Security Administration
- United States Substance Abuse and Mental Health Services Administration
- United States Supreme Court
- United States Tax Equity and Fiscal Responsibility Act
- United States Veterans Administration
- Unithiol
- Unitiol
- Units, Burn
- Units, Cancer Care
- Units, Colony-Forming
- Units, Coronary Care
- Units, Emergency Mobile
- Units, Emergency Outpatient
- Units, Hematopoietic Colony-Forming
- Units, Hospital
- Units, Hospital Hemodialysis
- Units, Intensive Care
- Units, Minimal Care
- Units, Mobile Emergency
- Units, Mobile Health
- Units, Neoplastic Colony-Forming
- Units, Pain Relief
- Units, Replication
- Units, Respiratory Care
- Units, Self-Care
- Units, SI
- Units, Trauma
- Universal Coverage
- Universal Precaution
- Universal Precautions
- Universities
- University
- University Health Service
- University Health Services
- University Hospitals
- University Medical Center
- University Medical Centers
- Unknown Origin Fever
- Unknown Origin Fevers
- Unknown Primary Neoplasm
- Unknown Primary Neoplasm Metastasis
- Unknown Primary Neoplasms
- Unknown Primary Tumor
- Unknown Primary Tumors
- Unloading, Hindlimb
- Unloading, Skeletal
- Unloadings, Hindlimb
- Unloadings, Skeletal
- Unmarried
- Unmarried Father
- Unmarried Fathers
- Unmarried Mother
- Unmarried Mothers
- Unmedicated IUD
- Unmedicated IUDs
- Unna Thost Syndrome
- Unna-Thost Syndrome
- Unnecessary Procedure
- Unnecessary Procedures
- Unnecessary Surgery
- Unplanned Pregnancies
- Unplanned Pregnancy
- Unprotected Sex
- Unpublished Documents (PT)
- Unpublished Documents [Publication Type]
- Unpublished Works (PT)
- Unpublished Works [Publication Type]
- Unsafe Sex
- Unsaturated Dietary Fat
- Unsaturated Dietary Fats
- Unsaturated Fats
- Unsaturated Fatty Acids