Safety and Effectiveness of Giroctocogene Fitelparvovec or Fidanacogene Elaparvovec in Patients With Hemophilia A or B Respectively
A study to learn about the long-term safety and efficacy of giroctocogene fitelparvovec or fidanacogene elaparvovec in patients with hemophilia A or hemophilia B respectively, who have received treatm...
Open-Label Extension Study of Marstacimab in Hemophilia Participants With or Without Inhibitors
Study B7841007 is an open-label extension study to assess the long-term safety, tolerability, and efficacy of prophylaxis treatment with marstacimab in participants who did not require "Early Terminat...
A Study to Investigate the Safety and Effectiveness of a Coagulation Factor IX Gene Insertion Therapy (REGV131-LNP1265) in Pediatric, Adolescent and Adult Participants With Hemophilia B
Participants in this study have a genetic mutation, specifically in the coagulation (blood clotting) Factor 9 gene that causes severe or moderately severe hemophilia B. This study is researching an ex...
A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of NXT007 in Persons With Severe or Moderate Hemophilia A
WP44714 is a Phase I/II, open-label, non-randomized, global, multicenter trial consisting of two parts: * Part 1 is a multiple-ascending dose (MAD) study in adult and adolescent male participants wit...
SEVENFACT® for Bleeding Events in Hemophilia With Inhibitors
Phase IV multi-center, US-centric, open-label, safety study enrolling participants with Hemophilia A or B with inhibitors, 12 years of age and older, who are either on long term prophylactic treatment...
Emicizumab in Patients With Acquired Hemophilia A
This is a phase II multicenter open-label, single-arm prospective study to evaluate the efficacy of prophylactic emicizumab administered on a scheduled basis to prevent bleeds in patients with acquire...
Efficacy and Safety of CSL222 (Etranacogene Dezaparvovec) Gene Therapy in Adults With Hemophilia B With Pretreatment Adeno-associated Virus Serotype 5 (AAV5) Neutralizing Antibodies (Nabs)
The purpose of this study is to assess the risk of bleeding due to failure of expected pharmacological action of CSL222 in adults with severe or moderately severe hemophilia B with detectable pretreat...
BeCoMe-9: A Clinical Study of BE-101 for the Treatment of Adults With Moderately Severe or Severe Hemophilia B
The BeCoMe-9 Study (BE-101-01) is a Phase 1/2, first in human, multi-center, open-label, dose-escalation study to evaluate the safety and clinical activity of a single intravenous (IV) dose of BE-101 ...
Phase 3, Open-label, Single-dose Study of CSL222 in Adolescent Male Subjects (≥ 12 to < 18 Years of Age) With Severe or Moderately Severe Hemophilia B
This is a phase 3, prospective, open-label, single-arm, single-dose, multicenter study investigating the efficacy, safety, and tolerability of CSL222 (AAV5-hFIXco-Padua) in adolescent male participant...
SAFE Study: Safety of aPCC Following Emicizumab Prophylaxis
The purpose of the aPCC-emicizumab safety study is to investigate the hemostatic efficacy as measured by thrombin generation, of a low personalized dose of aPCC (FEIBA) in children and adults with hem...
Top Cities for Hemophilia Clinical Trials
Hemophilia clinical trials are recruiting across 45 cities. Here are the cities with the most active studies:
About Hemophilia
Hemophilia is a rare genetic bleeding disorder in which blood does not clot properly due to deficiency of clotting factors. Hemophilia A (factor VIII) and hemophilia B (factor IX) are the most common types. Treatment includes factor replacement therapy and newer approaches like gene therapy.
Clinical trials are advancing new treatments for hemophilia. Currently, 10 studies are recruiting a combined 886 participants across the United States. Research is being conducted by 8 organizations including Pfizer, Regeneron Pharmaceuticals, Hoffmann-La Roche and 5 others.
2026 Hemophilia Research Landscape
As of March 2026, the hemophilia clinical trial landscape includes 10 actively recruiting studies across 45 cities in the United States. These studies are collectively seeking 886 participants, with an average enrollment target of 89 per study.
Research is being led by 8 different organizations, including Pfizer, Regeneron Pharmaceuticals, Hoffmann-La Roche, American Thrombosis and Hemostasis Network, University of Washington, and 3 others.
Geographically, hemophilia trials are most concentrated in Sacramento, California (7 trials); Hamilton, Ontario (5 trials); Los Angeles, California (4 trials); Ann Arbor, Michigan (4 trials); Atlanta, Georgia (4 trials) and 7 other cities.
Featured Hemophilia Studies
Highlighted recruiting studies for hemophilia, selected by enrollment size and research scope.
Safety and Effectiveness of Giroctocogene Fitelparvovec or Fidanacogene Elaparvovec in Patients With Hemophilia A or B Respectively
A study to learn about the long-term safety and efficacy of giroctocogene fitelparvovec or fidanacogene elaparvovec in patients with hemophilia A or hemophilia B respectively, who have received treatment through prior participation in a Pfizer-sponsored clinical trial. Data collection and participant visits will be based on standard of care.
Open-Label Extension Study of Marstacimab in Hemophilia Participants With or Without Inhibitors
Study B7841007 is an open-label extension study to assess the long-term safety, tolerability, and efficacy of prophylaxis treatment with marstacimab in participants who did not require "Early Termination" from the Phase 3 Study B7841005 and from the Phase 3 Study B7841008. Study B7841005: approximately 145 adolescent and adult participants 12 to \<75 years of age with severe hemophilia A or moder...
A Study to Investigate the Safety and Effectiveness of a Coagulation Factor IX Gene Insertion Therapy (REGV131-LNP1265) in Pediatric, Adolescent and Adult Participants With Hemophilia B
Participants in this study have a genetic mutation, specifically in the coagulation (blood clotting) Factor 9 gene that causes severe or moderately severe hemophilia B. This study is researching an experimental gene insertion therapy (the adding of a gene into your DNA) called REGV131-LNP1265, also called the "study drug". Gene insertion therapy aims to teach the body how to produce clotting facto...
Frequently Asked Questions About Hemophilia Clinical Trials
Are there hemophilia clinical trials near me?
Yes, there are 10 hemophilia clinical trials currently recruiting across 45+ cities in the United States, including Sacramento, California; Hamilton, Ontario; Los Angeles, California. Browse the studies above to find one at a location convenient for you.
How do I join a hemophilia clinical trial?
To join a hemophilia clinical trial: 1) Browse the available studies on this page, 2) Click on a study that interests you, 3) Check the study locations to find a site near you, 4) Review the eligibility criteria, and 5) Contact the study site or complete the eligibility form. The process is free and you can withdraw at any time.
Are hemophilia clinical trials free?
Yes, participation in hemophilia clinical trials is free. Study-related treatments, medical tests, and doctor visits are provided at no cost to participants. Many studies also offer compensation for your time and travel expenses.
What types of hemophilia treatments are being studied?
Current hemophilia clinical trials are testing a range of approaches. These include new drugs, combination therapies, medical devices, and other interventions sponsored by 8 research organizations.
Is it safe to participate in hemophilia clinical trials?
Clinical trials are carefully regulated by the FDA and institutional review boards (IRBs). All trials must follow strict safety protocols, and participants receive close medical monitoring throughout the study. You can withdraw from a trial at any time without penalty.
Data updated March 2, 2026 from ClinicalTrials.gov
About This Data
Clinical trial information on this page is sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health (NIH) and National Library of Medicine (NLM). Study data is refreshed every hour to ensure accuracy.
Medical Disclaimer: The information provided on this page is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making decisions about clinical trial participation or changes to your treatment plan.
Page reviewed by the HelloStudys Research Team · Last updated March 2, 2026 · Data from ClinicalTrials.gov