National Heart, Lung, and Blood Institute (NHLBI)

Open enrollment with an early-phase pipeline tilt

According to ClinicalTrials.gov-derived indexes, National Heart, Lung, and Blood Institute (NHLBI) sits in the top decile of US sponsors by registered trial count (#73 of 15,742 sponsors by registered trial count).

501 total trials 62 currently recruiting 381 completed early-phase tilt top decile by trial count

National Heart, Lung, and Blood Institute (NHLBI): 501 sponsored US clinical trials, 62 recruiting.

National Heart, Lung, and Blood Institute (NHLBI) sponsors 501 registered US clinical trials on ClinicalTrials.gov, 62 of them currently recruiting, and 381 completed. 33 of these trials are in Phase 3-4 (later-stage) and 205 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Atherosclerosis, with 12 trials.

Top-decile sponsor footprint

National Heart, Lung, and Blood Institute (NHLBI) ranks in the top decile of sponsors by registered trial count (#73 of 15,742 sponsors by registered trial count). Volume at this scale usually reflects a long institutional pipeline, read phase tilt and therapeutic areas below before treating it as current-year activity.

Trial completion reliability score

C 68/100

381 of 417 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (91.4%), vs. national p10 68.4% / p90 100% among 1,234 sponsors with at least 10 decided trials. Still-open trials (Recruiting, Active-not-recruiting, Not-yet-recruiting) are excluded since they have not reached an outcome yet.

Open and recent trials

501 total, page 1 of 11

RECRUITING Phase 1

Partial Stem Cell Transplant for Sickle Cell Disease From Matched Donors

NCT07599176

RECRUITING Phase 1

Escalating Doses of VAS-101 in Subjects With Stable Sickle Cell Disease

NCT07566494

RECRUITING

GRAfT 2.0. A Multimodal Prospective Approach to Define the Mechanisms and Clinical Features of Acute and Chronic Rejection in Lung Transplantation

NCT07516379

RECRUITING

Platelet Volunteers, Longitudinal and Multi-omic Study

NCT07137429

RECRUITING Early Phase 1

Immune Profiling of CLL/SLL Treated With First-Line Pirtobrutinib

NCT07428707

RECRUITING Phase 2

Baricitinib in the Treatment of Kohlmeier-Degos Disease in Patients With Neurological Involvement

NCT06923072

RECRUITING NA

NHLBI and Cook Trans-Atrial Intra-Pericardial Tricuspid Annuloplasty (TRAIPTA) Early Feasibility Study

NCT06479824

RECRUITING

Natural History of Uncommon Dyslipidemias, Rare Lipid Disorders and Unusual Atherosclerotic Conditions

NCT06676046

RECRUITING Phase 1

Study to Evaluate the Safety and Tolerability of Escalating Doses of Fostamatinib in Subjects With Stable Sickle Cell Disease

NCT05904093

RECRUITING NA

OurSleepKit To Support CPAP Adherence

NCT06621511

RECRUITING

Thrombosis and Inflammation in Vessels Initiative (TIVI)

NCT06552767

RECRUITING Early Phase 1

Human Milk Oligosaccharide-Based Synbiotic Supplement for Intestinal Microbiota Dysbiosis

NCT06615986

RECRUITING Early Phase 1

Determination of Red Cell Survival in Sickle Cell Disease and Other Hemoglobinopathies Using Biotin Labeling

NCT06313398

RECRUITING

Technical Development of Cardiovascular Magnetic Resonance Imaging

NCT04927429

RECRUITING

Early Detection of Infectious and Noninfectious Lung Diseases Following Allogeneic Hematopoietic Stem Cell Transplantation

NCT06093867

RECRUITING Phase 1

Double-blind Placebo Controlled Study to Evaluate the Effect of NAD+ Boosting With Nicotinamide Riboside on Immunometabolism and Immunity in Systemic Lupus Erythematosus

NCT06032923

RECRUITING Phase 1

JAK1/2 Inhibitor Ruxolitinib for Relapsed/Refractory Immune Bone Marrow Failure

NCT05998408

RECRUITING NA

Healing Within: Mindfulness Smoking Cessation Intervention

NCT07013968

RECRUITING Phase 1

Study of Intravenous ZMA001 in Healthy Subjects

NCT05967299

RECRUITING

Observational Study of Cardiac Arrhythmias During Treatment With BTK Inhibitors or Venetoclax

NCT05724121

RECRUITING Phase 4

Vaccine Responses in Patients With B Cell Malignancies

NCT05170399

RECRUITING

Controls and Healthy Vasculature Initiative

NCT05403151

RECRUITING

Natural History Study of CADASIL

NCT05072483

RECRUITING

Observational Study to Deeply Phenotype Major Organs in Sickle Cell Disease After Curative Therapies

NCT05213572

RECRUITING

Natural History of Acquired and Inherited Bone Marrow Failure Syndromes

NCT05012111

RECRUITING

Geospatial Analysis of Neighborhood Environmental Stress in Relation to Biological Markers of Cardiovascular Health and Health Behaviors in Women

NCT04014348

RECRUITING Phase 1

Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Fx-5A in Healthy Volunteers

NCT04216342

RECRUITING Phase 2

Early Initiation of Oral Therapy With Cyclosporine and Eltrombopag for Treatment Naive Severe Aplastic Anemia (SAA)

NCT04304820

RECRUITING

CHIP/CCUS Natural History Protocol

NCT04102423

RECRUITING Phase 1

Repeat Peripheral Blood Stem Cell Transplantation for Patients With Sickle Cell Disease and Falling Donor Myeloid Chimerism Levels

NCT04008368

RECRUITING Phase 2

Early Clonal Dynamics During Venetoclax Treatment for Relapsed or Refractory Chronic Lymphocytic Leukemia (CLL)

NCT03986034

RECRUITING Phase 2

Haplo-identical Transplantation for Severe Aplastic Anemia, Hypo-plastic MDS and PNH Using Peripheral Blood Stem Cells and Post-transplant Cyclophosphamide for GVHD Prophylaxis

NCT03520647

RECRUITING

Genotype -Phenotype Correlation of PKLR Variants With Pyruvate Kinase, 2,3-Diphosphglycerate and Adenosine Triphosphate Activities in Red Blood Cells of People With Sickle Cell Disease

NCT03685721

RECRUITING Phase 2

Dietary Omega-7 Palmitoleic Acid-Rich Oil on Lipoprotein Metabolism and Satiety in Adults

NCT03372733

RECRUITING

Vascular Disease Discovery Protocol

NCT03538639

RECRUITING

Technical and Translational Development of Cardiovascular Magnetic Resonance (CMR) Imaging

NCT03581318

RECRUITING NA

Tailoring Mobile Health Technology to Reduce Obesity and Improve Cardiovascular Health in Resource-Limited Neighborhood Environments

NCT03288207

RECRUITING Phase 2

Low-Dose Danazol for the Treatment of Telomere Related Diseases

NCT03312400

RECRUITING NA

Technical Development of Cardiovascular Magnetic Resonance Imaging (CMR) Using a Low Specific Absorption Rate (SAR) Scanner System

NCT03331380

RECRUITING Phase 1

Unrelated Umbilical Cord Blood Transplantation for Severe Aplastic Anemia and Hypo-plastic MDS Using CordIn(TM), Umbilical Cord Blood-Derived Ex Vivo Expanded Stem and Progenitor Cells to Expedite Engraftment and Improve Transplant Outcome

NCT03173937

RECRUITING

Williams Syndrome (WS) and Supravalvar Aortic Stenosis (SVAS) DNA and Tissue Bank

NCT02706639

RECRUITING

Human Biospecimen Procurement Protocol: Biorepository to Support Translational Research to Identify Disease Mechanism(s)

NCT02543996

RECRUITING

Genome Transplant Dynamics

NCT02423070

RECRUITING

Prospective Evaluation of Next Generation CT Reconstruction (NextGenIR)

NCT02417714

RECRUITING

Heart Health Study in Washington D.C. to Develop a Community-Based Behavioral Weight Loss Intervention

NCT01927783

RECRUITING Phase 1

Nebulized or Inhaled Albuterol for Lymphangioleiomyomatosis

NCT01799538

RECRUITING NA

Evaluating New Radiation Techniques for Cardiovascular Imaging

NCT01621594

RECRUITING Phase 2

Allogeneic Hematopoietic Stem Cell Transplantation for Severe Aplastic Anemia and Other Bone Marrow Failure Syndromes Using G-CSF Mobilized CD34+ Selected Hematopoietic Precursor Cells Co-Infused With a Reduced Dose of Non-Mobilized Donor T-cells

NCT01174108

RECRUITING

Characterization of Patients With Uncommon Presentations and/or Uncommon Diseases Associated With the Cardiovascular System

NCT01143454

RECRUITING

Natural History of Bronchiectasis

NCT00943514

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Phase Distribution

PhaseTrial count
Phase 1 87
Phase 2 118
Phase 3 29
Phase 4 4

What is open in the National Heart, Lung, and Blood Institute (NHLBI) pipeline

62 recruiting of 501 indexed (12% open); 381 completed (76%).

Phase mix: 33 late (III/IV) vs 205 early (I/II) (early-phase heavy).

Top condition: Atherosclerosis (12 trials), 9 others listed.

How open-pipeline share is computed

Recruiting share is recruiting_count divided by trial_count for this sponsor in the public registry export. Status can change between pulls; treat the figure as a research-attention snapshot, not product availability.

National Heart, Lung, and Blood Institute (NHLBI): open-pipeline peers nationwide

Peers matched on 501 registered trials and 12% open enrollment, not the therapeutic-area sidebar.

National Heart, Lung, and Blood Institute (NHLBI) sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot). 2×2 strategic matrix plotting 9 entities by Total trials (X) and Recruiting share (Y), with a crosshair dividing the plot into four quadrants. Higher volume & more openFocused & more openHigher volume, mostly closedSmaller & mostly closed 05001,0001,500 0%5%10%15%20% Total trials Recruiting share National Heart, Lung, and Blood Institute (NHLBI)H. Lee Moffitt Cancer Center and Research InstituteGilead SciencesNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Beth Israel Deaconess Medical CenterBoston UniversityAstraZenecaDaiichi SankyoUniversity of Iowa
National Heart, Lung, and Blood Institute (NHLBI) sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

National Heart, Lung, and Blood Institute (NHLBI) sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 501 trials (± recruiting share)

Sponsors near 12% open enrollment (± trial volume)

What to do with this National Heart, Lung, and Blood Institute (NHLBI) page

501 registered trials is a research-attention snapshot, not an endorsement of National Heart, Lung, and Blood Institute (NHLBI) or any single study.

  • 62 of National Heart, Lung, and Blood Institute (NHLBI)'s trials are currently recruiting, check each one's own eligibility criteria before contacting a site. Browse recruiting trials
  • Atherosclerosis is the condition National Heart, Lung, and Blood Institute (NHLBI) studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Atherosclerosis trials
  • Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

National Heart, Lung, and Blood Institute (NHLBI) pipeline card: 501 registered trials from official public datasets.Report a data error.