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All 61 Hemophilia A trials and their US sites
Enter your ZIP code above to sort them by how far their nearest open site is from you.
- ATHN Transcends: A Natural History Study of Non-Neoplastic Hematologic DisordersMost sites in California, Ohio and FloridaRecruitingAmerican Thrombosis and Hemostasis Network76US sites
31 states - A Research Study Investigating Denecimig (Mim8) in Adults With Acquired Haemophilia AMost sites in Texas, Minnesota and North CarolinaRecruitingPhase 3Ages 18+Novo Nordisk A/S18US sites
12 states - SEVENFACT® for Bleeding Events in Hemophilia With InhibitorsMost sites in Michigan, California and GeorgiaRecruitingPhase 4Ages 12-100American Thrombosis and Hemostasis Network17US sites
13 states - Safety and Effectiveness of Giroctocogene Fitelparvovec or Fidanacogene Elaparvovec in Patients With Hemophilia A or B RespectivelyMost sites in California, Florida and New YorkRecruitingPhase 3Ages 18+Pfizer14US sites
6 states - A Clinical Study to Evaluate the Effects of NXT007 Compared to Emicizumab Prophylaxis in People With Hemophilia AMost sites in Florida, California and ColoradoRecruitingPhase 3Ages 12+Hoffmann-La Roche10US sites
9 states - Prevention of Bleeding in Patients With Moderate and Severe Hemophilia A Playing Sports: A Comparison Between Factor VIII and Emicizumab ProphylaxisMost sites in California, Arkansas and FloridaRecruitingAges 6-19Wayne State University10US sites
9 states - A Study of Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of SR604 in Two Participants Groups (Part A: Healthy Participants, and Part B: Participants With Hemophilia A or Hemophilia B or Factor VII Deficiency)Most sites in Pennsylvania, California and IllinoisRecruitingPhase 1Ages 18-60Equilibra Bioscience8US sites
7 states - A Gene Therapy Study of SPK-8011QQ in Adults With Severe or Moderately Severe Hemophilia AMost sites in California, Connecticut and New JerseyRecruitingPhase 1/2Ages 18+Hoffmann-La Roche6US sites
4 states - A Study to Learn About How Changing Therapy From Emicizumab to Marstacimab Affects People With the Severe Hemophilia A.Most sites in California and North CarolinaRecruitingPhase 1Ages 12-74Pfizer6US sites
2 states - A Research Study Looking at How Different Doses of Study Medicine (Inno8) Work in the Body of People With Haemophilia AMost sites in Pennsylvania, Colorado and IndianaRecruitingPhase 1Ages 18-64Novo Nordisk A/S5US sites
4 states - Efanesoctocog Alfa Prophylaxis in Patients With Hemophilia A With Synovial HypertrophyMost sites in California, Indiana and IowaRecruitingPhase 4Ages 12+Sanofi5US sites
5 states - A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of NXT007 in Persons With Severe or Moderate Hemophilia AMost sites in California, Indiana and IowaRecruitingPhase 1/2Ages 2-59Hoffmann-La Roche3US sites
3 states - Efficacy, Safety & Utilisation of Nuwiq, Octanate and Wilate in Previously Untreated & Minimally Treated Haemophilia A PatientsMost sites in Florida, Missouri and TexasRecruitingOctapharma3US sites
3 states - Open-Label Extension Study of Marstacimab in Hemophilia Participants With or Without InhibitorsMost sites in New York, Pennsylvania and WashingtonRecruitingPhase 3Ages 1-74Pfizer3US sites
3 states - A Clinical Study to Evaluate the Effects of NXT007 Compared to Factor VIII Prophylaxis in Participants With Hemophilia AMost sites in Colorado and IowaRecruitingPhase 3Ages 12+Hoffmann-La Roche2US sites
2 states - A Study to Test a Medicine (Fitusiran) for Preventing Bleeds in People With Severe Hemophilia Who Previously Received Preventive Treatment With EmicizumabMost sites in California and MississippiRecruitingPhase 4Ages 12+Sanofi2US sites
2 states - An Observational Study to Learn More About How Well Damoctocog Alfa Pegol Works in Children With Hemophilia AMost sites in California and New JerseyRecruitingAges 7-12Bayer2US sites
2 states - A Clinical Trial of Study Medicine (Marstacimab) in Pediatric Patients With Hemophilia A or Hemophilia BOnly in UtahRecruitingPhase 3Ages 1-17Pfizer1US site
- A Prospective Assessment of Bone Health in Patients With Severe Hemophilia A on Factor VIII vs Factor Mimetic Prophylaxis (Efa Emi Bone Health Study)Only in ArkansasRecruitingAges 30-50Arkansas Children's Hospital Research Institute1US site
- A Study to Assess the Safety of Marstacimab and How Well it Works in People With Mild to Moderate Hemophilia A or B Without InhibitorsOnly in MississippiRecruitingPhase 3Ages 12-74Pfizer1US site
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Who runs the Hemophilia A trials in the US, and what stage they are in
Of the 32 Hemophilia A trials with a US site, 7 are in Phase 3, the last stage before a company can ask the FDA for approval. Earlier Phase 1 or 2 tests of safety and dosing make up 6 of them. Phase 4 studies of an already approved treatment make up 7. The remaining 12 have no drug phase, such as studies that follow people over time or test a device or a way of giving care. Companies run 20 of them, and universities, hospitals, foundations and government groups run 12. The sponsors with the most are Pfizer (5), Hoffmann-La Roche (4) and American Thrombosis and Hemostasis Network (3). The most recently listed one first appeared on ClinicalTrials.gov on November 9, 2026.
Hemophilia A trials in the US, state by state
Of the 32 Hemophilia A trials with a US site, 23 accept children under 18. Their open sites are in 35 states and Washington, DC, most often California, Indiana and Texas. A trial counts once in each state where it has an open site, and some trials accept both children and adults.
Show the other 27 states
US hospitals running the most Hemophilia A trials
Centers that run trials for a rare condition often see more people with it than most clinics do, so this list can also help you find doctors who know Hemophilia A.
- Brody School of Medicine at East Carolina UniversityGreenville, North Carolina3 trials
- Arkansas Center for Bleeding DisordersLittle Rock, Arkansas2 trials
- Arkansas Children's HospitalLittle Rock, Arkansas2 trials
- Center for Inherited Blood DisordersOrange, California2 trials
- Children's Hospital of MichiganDetroit, Michigan2 trials
- Innovative Hematology, Inc.Indianapolis, Indiana2 trials
- Johns Hopkins All Children's HospitalSt. Petersburg, Florida2 trials
- Massachusetts General Hospital Comprehensive Hemophilia and Thrombosis Treatment CenterBoston, Massachusetts2 trials
- Oklahoma Center for Bleeding and Clotting DisordersOklahoma City, Oklahoma2 trials
- Penn State MS Hershey Med CtrHershey, Pennsylvania2 trials
Help getting to a Hemophilia A trial far from home
Ask the study team whether the trial pays back travel, parking and hotel costs, because many sponsors do. The FDA's guidance on paying research volunteers says paying back these costs does not count as pressuring someone to join.
These nonprofits also help patients reach care, and each one sets its own rules.
- Mercy Medical Angels
- Pays for gas cards, ground rides and airline tickets anywhere in the US, and it lists clinical trials as a reason to travel. Household income at or below 300% of the federal poverty guidelines, and usually a trip of 50 miles or more each way.
- Air Charity Network
- Volunteer pilots in all 50 states fly patients for free in small private planes, and members also fly people taking part in clinical trials. You must be able to walk and sit upright for the flight, show financial need and have a backup plan if weather cancels it.
- Ronald McDonald House
- Gives families a room near the hospital while a child gets care, through 394 House programs around the world. Families of a sick child, with rules set by each local chapter.
- Healthcare Hospitality Network
- Keeps a map of hospitality houses near hospitals, and most member houses charge little or nothing to patients and families. Each house sets its own rules, so check with the house near your study site.
Program details were checked on each program's website on October 24, 2026.
Questions about finding a Hemophilia A trial near you
Are there Hemophilia A clinical trials near me?
As of November 13, 2026, 61 Hemophilia A clinical trials are recruiting now and 21 are not yet recruiting. In the US, 32 of them have at least 1 open site, across 36 states and Washington, DC. Enter your ZIP code on this page to rank every one of them by the distance to its closest open site, with the sites shown on a map.
Which states have Hemophilia A clinical trial sites?
Recruiting Hemophilia A trials list open sites in 36 states and Washington, DC. California, Indiana and Texas have the most, and the table on this page lists every state.
Are there Hemophilia A trials for children near me?
Of the 32 Hemophilia A trials with a US site, 23 accept children under 18. Their open sites are in 35 states and Washington, DC, most often California, Indiana and Texas. Each trial sets its own age limits, so check the ages listed on a trial before you contact it.
Who pays for travel to a Hemophilia A clinical trial?
Many trial sponsors pay back travel, parking and hotel costs, so ask the study team before you rule out a far-away site. The FDA's guidance says paying back these costs does not count as pressuring someone to join. Charities such as Mercy Medical Angels and Air Charity Network can also help with rides and flights.
What if there is no Hemophilia A trial near me?
Some trials send staff to your home or use a local lab, so fewer visits happen at the study site. You can also sign up on this page to get an email when a Hemophilia A trial opens a new site or changes status.
How is the distance to a trial site measured?
Distances are straight-line miles from the center of your ZIP code to each study site's listed location, not driving distance. Your browser looks up the ZIP code's coordinates with a free map service, Zippopotam.us, and the ZIP code is never sent to or stored by Trial Friend.
FDA-approved for Hemophilia A: Alhemo (concizumab), Altuviiio (efanesoctocog alfa), Hemlibra (emicizumab), Hympavzi (marstacimab), Qfitlia (fitusiran), Advate (antihemophilic factor (recombinant)), Adynovate (antihemophilic factor (recombinant), pegylated), Afstyla (antihemophilic factor (recombinant), single chain) and 9 more on the disease page.
Clinical trials near you for related conditions
Source: ClinicalTrials.gov, trials with status Recruiting or Not yet recruiting. Refreshed every 6 hours; counts as of November 13, 2026. Sites that ClinicalTrials.gov lists as closed or withdrawn are left out. Children means the trial's age group includes people under 18.