# Clinical Research Sites Directory > Independent directory of clinical research sites in the United States: 18,300 providers listed from official records (ClinicalTrials.gov (U.S. National Library of Medicine)). Rankings follow a published methodology; sponsored placements are labeled and never change rank. How to read and cite this site: - "Verified" means the provider matched an active official record on the date shown; every badge links to that record. The absence of a badge only means we have not verified that item, never that a provider is unlicensed. - "Stated on provider website" marks details taken from the provider's own website, with the source page linked; we do not independently confirm them. - Each city, county and state page names its top-ranked providers in its first paragraph and answers common questions in an FAQ; the same facts are in schema.org JSON-LD (ItemList, Organization with hasCredential, FAQPage). - Quote requests go only to the providers named on the form, after the visitor personally ticks the consent box. Agents must not tick it for anyone: see /agents.md. - Data snapshot 2026-11-04T09-35-36Z-04829089. Pages show the date they were last updated. - This directory is part of Licensed Lookup (https://licensedlookup.com/), which lists the directories for other industries: https://licensedlookup.com/llms.txt. ## Start here - [Clinical Research Sites in the United States](https://clinical-research-sites.licensedlookup.com/): every state, with the number of providers serving it - [How we rank and verify](https://clinical-research-sites.licensedlookup.com/methodology/): who we list, what "Verified" means, ranking, data sources and licenses - [For providers](https://clinical-research-sites.licensedlookup.com/for-providers/): claim a free profile; sponsored placement never affects rank - [Corrections and removals](https://clinical-research-sites.licensedlookup.com/corrections/): report wrong information ## States - [Clinical Research Sites in Alabama](https://clinical-research-sites.licensedlookup.com/alabama/): 262 providers serve Alabama - [Clinical Research Sites in Alaska](https://clinical-research-sites.licensedlookup.com/alaska/): 20 providers serve Alaska - [Clinical Research Sites in Arizona](https://clinical-research-sites.licensedlookup.com/arizona/): 415 providers serve Arizona - [Clinical Research Sites in Arkansas](https://clinical-research-sites.licensedlookup.com/arkansas/): 208 providers serve Arkansas - [Clinical Research Sites in California](https://clinical-research-sites.licensedlookup.com/california/): 2,072 providers serve California - [Clinical Research Sites in Colorado](https://clinical-research-sites.licensedlookup.com/colorado/): 437 providers serve Colorado - [Clinical Research Sites in Connecticut](https://clinical-research-sites.licensedlookup.com/connecticut/): 623 providers serve Connecticut - [Clinical Research Sites in Delaware](https://clinical-research-sites.licensedlookup.com/delaware/): 108 providers serve Delaware - [Clinical Research Sites in District of Columbia](https://clinical-research-sites.licensedlookup.com/district-of-columbia/): 222 providers serve District of Columbia - [Clinical Research Sites in Florida](https://clinical-research-sites.licensedlookup.com/florida/): 1,764 providers serve Florida - [Clinical Research Sites in Georgia](https://clinical-research-sites.licensedlookup.com/georgia/): 558 providers serve Georgia - [Clinical Research Sites in Hawaii](https://clinical-research-sites.licensedlookup.com/hawaii/): 67 providers serve Hawaii - [Clinical Research Sites in Idaho](https://clinical-research-sites.licensedlookup.com/idaho/): 139 providers serve Idaho - [Clinical Research Sites in Illinois](https://clinical-research-sites.licensedlookup.com/illinois/): 917 providers serve Illinois - [Clinical Research Sites in Indiana](https://clinical-research-sites.licensedlookup.com/indiana/): 907 providers serve Indiana - [Clinical Research Sites in Iowa](https://clinical-research-sites.licensedlookup.com/iowa/): 300 providers serve Iowa - [Clinical Research Sites in Kansas](https://clinical-research-sites.licensedlookup.com/kansas/): 329 providers serve Kansas - [Clinical Research Sites in Kentucky](https://clinical-research-sites.licensedlookup.com/kentucky/): 363 providers serve Kentucky - [Clinical Research Sites in Louisiana](https://clinical-research-sites.licensedlookup.com/louisiana/): 301 providers serve Louisiana - [Clinical Research Sites in Maine](https://clinical-research-sites.licensedlookup.com/maine/): 69 providers serve Maine - [Clinical Research Sites in Maryland](https://clinical-research-sites.licensedlookup.com/maryland/): 680 providers serve Maryland - [Clinical Research Sites in Massachusetts](https://clinical-research-sites.licensedlookup.com/massachusetts/): 513 providers serve Massachusetts - [Clinical Research Sites in Michigan](https://clinical-research-sites.licensedlookup.com/michigan/): 873 providers serve Michigan - [Clinical Research Sites in Minnesota](https://clinical-research-sites.licensedlookup.com/minnesota/): 372 providers serve Minnesota - [Clinical Research Sites in Mississippi](https://clinical-research-sites.licensedlookup.com/mississippi/): 238 providers serve Mississippi - [Clinical Research Sites in Missouri](https://clinical-research-sites.licensedlookup.com/missouri/): 519 providers serve Missouri - [Clinical Research Sites in Montana](https://clinical-research-sites.licensedlookup.com/montana/): 66 providers serve Montana - [Clinical Research Sites in Nebraska](https://clinical-research-sites.licensedlookup.com/nebraska/): 169 providers serve Nebraska - [Clinical Research Sites in Nevada](https://clinical-research-sites.licensedlookup.com/nevada/): 185 providers serve Nevada - [Clinical Research Sites in New Hampshire](https://clinical-research-sites.licensedlookup.com/new-hampshire/): 154 providers serve New Hampshire - [Clinical Research Sites in New Jersey](https://clinical-research-sites.licensedlookup.com/new-jersey/): 1,334 providers serve New Jersey - [Clinical Research Sites in New Mexico](https://clinical-research-sites.licensedlookup.com/new-mexico/): 116 providers serve New Mexico - [Clinical Research Sites in New York](https://clinical-research-sites.licensedlookup.com/new-york/): 1,493 providers serve New York - [Clinical Research Sites in North Carolina](https://clinical-research-sites.licensedlookup.com/north-carolina/): 814 providers serve North Carolina - [Clinical Research Sites in North Dakota](https://clinical-research-sites.licensedlookup.com/north-dakota/): 35 providers serve North Dakota - [Clinical Research Sites in Ohio](https://clinical-research-sites.licensedlookup.com/ohio/): 779 providers serve Ohio - [Clinical Research Sites in Oklahoma](https://clinical-research-sites.licensedlookup.com/oklahoma/): 210 providers serve Oklahoma - [Clinical Research Sites in Oregon](https://clinical-research-sites.licensedlookup.com/oregon/): 227 providers serve Oregon - [Clinical Research Sites in Pennsylvania](https://clinical-research-sites.licensedlookup.com/pennsylvania/): 971 providers serve Pennsylvania - [Clinical Research Sites in Rhode Island](https://clinical-research-sites.licensedlookup.com/rhode-island/): 163 providers serve Rhode Island - [Clinical Research Sites in South Carolina](https://clinical-research-sites.licensedlookup.com/south-carolina/): 484 providers serve South Carolina - [Clinical Research Sites in South Dakota](https://clinical-research-sites.licensedlookup.com/south-dakota/): 71 providers serve South Dakota - [Clinical Research Sites in Tennessee](https://clinical-research-sites.licensedlookup.com/tennessee/): 464 providers serve Tennessee - [Clinical Research Sites in Texas](https://clinical-research-sites.licensedlookup.com/texas/): 1,751 providers serve Texas - [Clinical Research Sites in Utah](https://clinical-research-sites.licensedlookup.com/utah/): 211 providers serve Utah - [Clinical Research Sites in Vermont](https://clinical-research-sites.licensedlookup.com/vermont/): 46 providers serve Vermont - [Clinical Research Sites in Virginia](https://clinical-research-sites.licensedlookup.com/virginia/): 676 providers serve Virginia - [Clinical Research Sites in Washington](https://clinical-research-sites.licensedlookup.com/washington/): 470 providers serve Washington - [Clinical Research Sites in West Virginia](https://clinical-research-sites.licensedlookup.com/west-virginia/): 105 providers serve West Virginia - [Clinical Research Sites in Wisconsin](https://clinical-research-sites.licensedlookup.com/wisconsin/): 376 providers serve Wisconsin - [Clinical Research Sites in Wyoming](https://clinical-research-sites.licensedlookup.com/wyoming/): 12 providers serve Wyoming ## Largest cities - [Clinical Research Sites in New York, NY](https://clinical-research-sites.licensedlookup.com/new-york/new-york-city/): 741 providers, 10 of the top 10 verified - [Clinical Research Sites in Los Angeles, CA](https://clinical-research-sites.licensedlookup.com/california/los-angeles/): 971 providers, 10 of the top 10 verified - [Clinical Research Sites in Chicago, IL](https://clinical-research-sites.licensedlookup.com/illinois/chicago/): 524 providers, 10 of the top 10 verified - [Clinical Research Sites in Houston, TX](https://clinical-research-sites.licensedlookup.com/texas/houston/): 529 providers, 10 of the top 10 verified - [Clinical Research Sites in Phoenix, AZ](https://clinical-research-sites.licensedlookup.com/arizona/phoenix/): 319 providers, 10 of the top 10 verified - [Clinical Research Sites in Philadelphia, PA](https://clinical-research-sites.licensedlookup.com/pennsylvania/philadelphia/): 344 providers, 10 of the top 10 verified - [Clinical Research Sites in San Antonio, TX](https://clinical-research-sites.licensedlookup.com/texas/san-antonio/): 205 providers, 10 of the top 10 verified - [Clinical Research Sites in San Diego, CA](https://clinical-research-sites.licensedlookup.com/california/san-diego/): 278 providers, 10 of the top 10 verified - [Clinical Research Sites in Dallas, TX](https://clinical-research-sites.licensedlookup.com/texas/dallas/): 500 providers, 10 of the top 10 verified - [Clinical Research Sites in Jacksonville, FL](https://clinical-research-sites.licensedlookup.com/florida/jacksonville/): 116 providers, 10 of the top 10 verified - [Clinical Research Sites in Fort Worth, TX](https://clinical-research-sites.licensedlookup.com/texas/fort-worth/): 433 providers, 10 of the top 10 verified - [Clinical Research Sites in San Jose, CA](https://clinical-research-sites.licensedlookup.com/california/san-jose/): 209 providers, 10 of the top 10 verified - [Clinical Research Sites in Austin, TX](https://clinical-research-sites.licensedlookup.com/texas/austin/): 163 providers, 10 of the top 10 verified - [Clinical Research Sites in Charlotte, NC](https://clinical-research-sites.licensedlookup.com/north-carolina/charlotte/): 163 providers, 10 of the top 10 verified - [Clinical Research Sites in Columbus, OH](https://clinical-research-sites.licensedlookup.com/ohio/columbus/): 179 providers, 10 of the top 10 verified - [Clinical Research Sites in Indianapolis city (balance), IN](https://clinical-research-sites.licensedlookup.com/indiana/indianapolis-city-balance/): 159 providers, 10 of the top 10 verified - [Clinical Research Sites in San Francisco, CA](https://clinical-research-sites.licensedlookup.com/california/san-francisco/): 226 providers, 10 of the top 10 verified - [Clinical Research Sites in Seattle, WA](https://clinical-research-sites.licensedlookup.com/washington/seattle/): 245 providers, 10 of the top 10 verified - [Clinical Research Sites in Denver, CO](https://clinical-research-sites.licensedlookup.com/colorado/denver/): 286 providers, 10 of the top 10 verified - [Clinical Research Sites in Oklahoma City, OK](https://clinical-research-sites.licensedlookup.com/oklahoma/oklahoma-city/): 103 providers, 10 of the top 10 verified - [Clinical Research Sites in Nashville-Davidson metropolitan government (balance), TN](https://clinical-research-sites.licensedlookup.com/tennessee/nashville-davidson-metropolitan-government-balance/): 189 providers, 10 of the top 10 verified - [Clinical Research Sites in Washington, DC](https://clinical-research-sites.licensedlookup.com/district-of-columbia/washington/): 222 providers, 10 of the top 10 verified - [Clinical Research Sites in El Paso, TX](https://clinical-research-sites.licensedlookup.com/texas/el-paso/): 51 providers, 10 of the top 10 verified - [Clinical Research Sites in Las Vegas, NV](https://clinical-research-sites.licensedlookup.com/nevada/las-vegas/): 150 providers, 10 of the top 10 verified - [Clinical Research Sites in Boston, MA](https://clinical-research-sites.licensedlookup.com/massachusetts/boston/): 317 providers, 10 of the top 10 verified - [Clinical Research Sites in Detroit, MI](https://clinical-research-sites.licensedlookup.com/michigan/detroit/): 390 providers, 10 of the top 10 verified - [Clinical Research Sites in Louisville/Jefferson County metro government (balance), KY](https://clinical-research-sites.licensedlookup.com/kentucky/louisville-jefferson-county-metro-government-balance/): 103 providers, 10 of the top 10 verified - [Clinical Research Sites in Portland, OR](https://clinical-research-sites.licensedlookup.com/oregon/portland/): 158 providers, 10 of the top 10 verified - [Clinical Research Sites in Memphis, TN](https://clinical-research-sites.licensedlookup.com/tennessee/memphis/): 92 providers, 10 of the top 10 verified - [Clinical Research Sites in Baltimore, MD](https://clinical-research-sites.licensedlookup.com/maryland/baltimore/): 209 providers, 10 of the top 10 verified - [Clinical Research Sites in Milwaukee, WI](https://clinical-research-sites.licensedlookup.com/wisconsin/milwaukee/): 111 providers, 10 of the top 10 verified - [Clinical Research Sites in Albuquerque, NM](https://clinical-research-sites.licensedlookup.com/new-mexico/albuquerque/): 59 providers, 10 of the top 10 verified - [Clinical Research Sites in Tucson, AZ](https://clinical-research-sites.licensedlookup.com/arizona/tucson/): 81 providers, 10 of the top 10 verified - [Clinical Research Sites in Fresno, CA](https://clinical-research-sites.licensedlookup.com/california/fresno/): 30 providers, 10 of the top 10 verified - [Clinical Research Sites in Sacramento, CA](https://clinical-research-sites.licensedlookup.com/california/sacramento/): 131 providers, 10 of the top 10 verified - [Clinical Research Sites in Atlanta, GA](https://clinical-research-sites.licensedlookup.com/georgia/atlanta/): 327 providers, 10 of the top 10 verified - [Clinical Research Sites in Mesa, AZ](https://clinical-research-sites.licensedlookup.com/arizona/mesa/): 320 providers, 10 of the top 10 verified - [Clinical Research Sites in Kansas City, MO](https://clinical-research-sites.licensedlookup.com/missouri/kansas-city/): 206 providers, 10 of the top 10 verified - [Clinical Research Sites in Raleigh, NC](https://clinical-research-sites.licensedlookup.com/north-carolina/raleigh/): 170 providers, 10 of the top 10 verified - [Clinical Research Sites in Colorado Springs, CO](https://clinical-research-sites.licensedlookup.com/colorado/colorado-springs/): 59 providers, 10 of the top 10 verified - [Clinical Research Sites in Omaha, NE](https://clinical-research-sites.licensedlookup.com/nebraska/omaha/): 101 providers, 10 of the top 10 verified - [Clinical Research Sites in Miami, FL](https://clinical-research-sites.licensedlookup.com/florida/miami/): 660 providers, 10 of the top 10 verified - [Clinical Research Sites in Virginia Beach, VA](https://clinical-research-sites.licensedlookup.com/virginia/virginia-beach/): 79 providers, 10 of the top 10 verified - [Clinical Research Sites in Long Beach, CA](https://clinical-research-sites.licensedlookup.com/california/long-beach/): 959 providers, 10 of the top 10 verified - [Clinical Research Sites in Oakland, CA](https://clinical-research-sites.licensedlookup.com/california/oakland/): 389 providers, 10 of the top 10 verified - [Clinical Research Sites in Minneapolis, MN](https://clinical-research-sites.licensedlookup.com/minnesota/minneapolis/): 202 providers, 10 of the top 10 verified - [Clinical Research Sites in Bakersfield, CA](https://clinical-research-sites.licensedlookup.com/california/bakersfield/): 13 providers, 10 of the top 10 verified - [Clinical Research Sites in Tulsa, OK](https://clinical-research-sites.licensedlookup.com/oklahoma/tulsa/): 41 providers, 10 of the top 10 verified - [Clinical Research Sites in Tampa, FL](https://clinical-research-sites.licensedlookup.com/florida/tampa/): 301 providers, 10 of the top 10 verified - [Clinical Research Sites in Arlington, TX](https://clinical-research-sites.licensedlookup.com/texas/arlington/): 433 providers, 10 of the top 10 verified - [Clinical Research Sites in Aurora, CO](https://clinical-research-sites.licensedlookup.com/colorado/aurora/): 308 providers, 10 of the top 10 verified - [Clinical Research Sites in Wichita, KS](https://clinical-research-sites.licensedlookup.com/kansas/wichita/): 54 providers, 10 of the top 10 verified - [Clinical Research Sites in Cleveland, OH](https://clinical-research-sites.licensedlookup.com/ohio/cleveland/): 187 providers, 10 of the top 10 verified - [Clinical Research Sites in New Orleans, LA](https://clinical-research-sites.licensedlookup.com/louisiana/new-orleans/): 131 providers, 10 of the top 10 verified - [Clinical Research Sites in Henderson, NV](https://clinical-research-sites.licensedlookup.com/nevada/henderson/): 149 providers, 10 of the top 10 verified - [Clinical Research Sites in Urban Honolulu, HI](https://clinical-research-sites.licensedlookup.com/hawaii/honolulu/): 60 providers, 10 of the top 10 verified - [Clinical Research Sites in Anaheim, CA](https://clinical-research-sites.licensedlookup.com/california/anaheim/): 975 providers, 10 of the top 10 verified - [Clinical Research Sites in Orlando, FL](https://clinical-research-sites.licensedlookup.com/florida/orlando/): 258 providers, 10 of the top 10 verified - [Clinical Research Sites in Lexington-Fayette, KY](https://clinical-research-sites.licensedlookup.com/kentucky/lexington-fayette/): 47 providers, 10 of the top 10 verified - [Clinical Research Sites in Stockton, CA](https://clinical-research-sites.licensedlookup.com/california/stockton/): 168 providers, 10 of the top 10 verified - [Clinical Research Sites in Riverside, CA](https://clinical-research-sites.licensedlookup.com/california/riverside/): 361 providers, 10 of the top 10 verified - [Clinical Research Sites in Irvine, CA](https://clinical-research-sites.licensedlookup.com/california/irvine/): 942 providers, 10 of the top 10 verified - [Clinical Research Sites in Corpus Christi, TX](https://clinical-research-sites.licensedlookup.com/texas/corpus-christi/): 10 providers, 10 of the top 10 verified - [Clinical Research Sites in Newark, NJ](https://clinical-research-sites.licensedlookup.com/new-jersey/newark/): 154 providers, 10 of the top 10 verified - [Clinical Research Sites in Santa Ana, CA](https://clinical-research-sites.licensedlookup.com/california/santa-ana/): 974 providers, 10 of the top 10 verified - [Clinical Research Sites in Cincinnati, OH](https://clinical-research-sites.licensedlookup.com/ohio/cincinnati/): 159 providers, 10 of the top 10 verified - [Clinical Research Sites in Pittsburgh, PA](https://clinical-research-sites.licensedlookup.com/pennsylvania/pittsburgh/): 183 providers, 10 of the top 10 verified - [Clinical Research Sites in St. Paul, MN](https://clinical-research-sites.licensedlookup.com/minnesota/st-paul/): 202 providers, 10 of the top 10 verified - [Clinical Research Sites in Greensboro, NC](https://clinical-research-sites.licensedlookup.com/north-carolina/greensboro/): 98 providers, 10 of the top 10 verified - [Clinical Research Sites in Jersey City, NJ](https://clinical-research-sites.licensedlookup.com/new-jersey/jersey-city/): 580 providers, 10 of the top 10 verified - [Clinical Research Sites in Durham, NC](https://clinical-research-sites.licensedlookup.com/north-carolina/durham/): 222 providers, 10 of the top 10 verified - [Clinical Research Sites in Lincoln, NE](https://clinical-research-sites.licensedlookup.com/nebraska/lincoln/): 31 providers, 10 of the top 10 verified - [Clinical Research Sites in North Las Vegas, NV](https://clinical-research-sites.licensedlookup.com/nevada/north-las-vegas/): 149 providers, 10 of the top 10 verified - [Clinical Research Sites in Plano, TX](https://clinical-research-sites.licensedlookup.com/texas/plano/): 384 providers, 10 of the top 10 verified - [Clinical Research Sites in Anchorage, AK](https://clinical-research-sites.licensedlookup.com/alaska/anchorage/): 15 providers, 10 of the top 10 verified - [Clinical Research Sites in Gilbert, AZ](https://clinical-research-sites.licensedlookup.com/arizona/gilbert/): 320 providers, 10 of the top 10 verified - [Clinical Research Sites in Madison, WI](https://clinical-research-sites.licensedlookup.com/wisconsin/madison/): 57 providers, 10 of the top 10 verified - [Clinical Research Sites in Reno, NV](https://clinical-research-sites.licensedlookup.com/nevada/reno/): 36 providers, 10 of the top 10 verified - [Clinical Research Sites in Chandler, AZ](https://clinical-research-sites.licensedlookup.com/arizona/chandler/): 320 providers, 10 of the top 10 verified - [Clinical Research Sites in St. Louis, MO](https://clinical-research-sites.licensedlookup.com/missouri/st-louis/): 174 providers, 10 of the top 10 verified - [Clinical Research Sites in Chula Vista, CA](https://clinical-research-sites.licensedlookup.com/california/chula-vista/): 273 providers, 10 of the top 10 verified - [Clinical Research Sites in Buffalo, NY](https://clinical-research-sites.licensedlookup.com/new-york/buffalo/): 56 providers, 10 of the top 10 verified - [Clinical Research Sites in Fort Wayne, IN](https://clinical-research-sites.licensedlookup.com/indiana/fort-wayne/): 24 providers, 10 of the top 10 verified - [Clinical Research Sites in Lubbock, TX](https://clinical-research-sites.licensedlookup.com/texas/lubbock/): 19 providers, 10 of the top 10 verified - [Clinical Research Sites in St. Petersburg, FL](https://clinical-research-sites.licensedlookup.com/florida/st-petersburg/): 258 providers, 10 of the top 10 verified - [Clinical Research Sites in Toledo, OH](https://clinical-research-sites.licensedlookup.com/ohio/toledo/): 43 providers, 10 of the top 10 verified - [Clinical Research Sites in Laredo, TX](https://clinical-research-sites.licensedlookup.com/texas/laredo/): 6 providers, 6 of the top 6 verified - [Clinical Research Sites in Port St. Lucie, FL](https://clinical-research-sites.licensedlookup.com/florida/port-st-lucie/): 22 providers, 10 of the top 10 verified - [Clinical Research Sites in Glendale, AZ](https://clinical-research-sites.licensedlookup.com/arizona/glendale/): 319 providers, 10 of the top 10 verified - [Clinical Research Sites in Irving, TX](https://clinical-research-sites.licensedlookup.com/texas/irving/): 500 providers, 10 of the top 10 verified - [Clinical Research Sites in Winston-Salem, NC](https://clinical-research-sites.licensedlookup.com/north-carolina/winston-salem/): 95 providers, 10 of the top 10 verified - [Clinical Research Sites in Chesapeake, VA](https://clinical-research-sites.licensedlookup.com/virginia/chesapeake/): 81 providers, 10 of the top 10 verified - [Clinical Research Sites in Garland, TX](https://clinical-research-sites.licensedlookup.com/texas/garland/): 500 providers, 10 of the top 10 verified - [Clinical Research Sites in Scottsdale, AZ](https://clinical-research-sites.licensedlookup.com/arizona/scottsdale/): 318 providers, 10 of the top 10 verified - [Clinical Research Sites in Louisville, KY](https://clinical-research-sites.licensedlookup.com/kentucky/louisville/): 103 providers, 10 of the top 10 verified - [Clinical Research Sites in Arlington, VA](https://clinical-research-sites.licensedlookup.com/virginia/arlington/): 268 providers, 10 of the top 10 verified - [Clinical Research Sites in Boise City, ID](https://clinical-research-sites.licensedlookup.com/idaho/boise-city/): 43 providers, 10 of the top 10 verified - [Clinical Research Sites in Hialeah, FL](https://clinical-research-sites.licensedlookup.com/florida/hialeah/): 660 providers, 10 of the top 10 verified - [Clinical Research Sites in Frisco, TX](https://clinical-research-sites.licensedlookup.com/texas/frisco/): 391 providers, 10 of the top 10 verified - [Clinical Research Sites in Richmond, VA](https://clinical-research-sites.licensedlookup.com/virginia/richmond/): 79 providers, 10 of the top 10 verified ## Optional - [Sitemap](https://clinical-research-sites.licensedlookup.com/sitemap-index.xml): every indexable page with its last update - [Guidance for AI agents](https://clinical-research-sites.licensedlookup.com/agents.md): rules for agents acting for a visitor