American Institute for Medical Research · About · API
142,889 sites ·
221 countries
— visible on map
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Oncology
Hematology
Cardiology
Neurology
Psychiatry
Endocrinology
Infectious
Respiratory
GI
Rheumatology
Nephrology
Dermatology
Ophthalmology
OB / GYN
Pain
Surgery
Urology
Pediatrics
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A
B
C
D
Quality Score Components
Each site is scored 0–1 based on:
30% Trial volume — number of registered trials (log-scaled) 20% Recent activity — trials in the last 3 years 15% Condition diversity — range of therapeutic areas studied 15% Address completeness — has a full address on file 10% Investigators — named principal investigators on record 10% Data completeness — overall profile richness
Tier Assignments
A Top 10% by score (avg 103 trials/site) B Next 20% (avg 7 trials/site) C Next 30% (avg 3 trials/site) D Bottom 40% (avg 2 trials/site)
Scores reflect data availability, not clinical quality. A Tier D site may be excellent but underrepresented in public registries.
