Clinical trials near you
Clinical trials in the Los Angeles area
3,257 studies are recruiting volunteers at 2,349 research sites in the Los Angeles-Long Beach-Anaheim, CA area.
Sites in Los Angeles, Orange, Irvine, Santa Monica, Long Beach, Torrance and 34 more towns.
#2 in the US for recruiting studies#1 in California#88 in the US per resident
- Studies recruiting
- 3,257
- Research sites
- 2,349
- Conditions studied
- 225
- Studies per 100,000 residents
- 25.2
Conditions being studied
The conditions with the most studies recruiting in the area. A study can be for more than one condition.
- Lung cancer224 studies
- Breast cancer185 studies
- Colorectal cancer (bowel cancer)149 studies
- Leukemia132 studies
- Non-Hodgkin's lymphoma127 studies
- Prostate cancer122 studies
- Head and neck cancer121 studies
- Liver disease99 studies
- Ovarian cancer93 studies
- Pancreatic cancer79 studies
- Uterine cancer78 studies
- Overweight and obesity70 studies
- Neuroendocrine tumor69 studies
- Endometrial cancer62 studies
- Gastric cancer (stomach cancer)59 studies
All 225 conditions
- Lung cancer224
- Breast cancer185
- Colorectal cancer (bowel cancer)149
- Leukemia132
- Non-Hodgkin's lymphoma127
- Prostate cancer122
- Head and neck cancer121
- Liver disease99
- Ovarian cancer93
- Pancreatic cancer79
- Uterine cancer78
- Overweight and obesity70
- Neuroendocrine tumor69
- Endometrial cancer62
- Gastric cancer (stomach cancer)59
- Skin cancer59
- Melanoma56
- Sarcoma of soft tissue56
- Multiple myeloma (MM)55
- Kidney cancer53
- Liver cancer53
- Esophageal cancer51
- Depressive disorder50
- Bladder cancer48
- Inflammatory bowel disease (IBD)46
- Myelodysplastic syndrome (MDS)43
- Type 2 diabetes43
- Brain cancer39
- Retinal degeneration39
- Alzheimer's disease37
- Stroke37
- Age-related macular degeneration (AMD)36
- Heart failure36
- Schizophrenia34
- Cervical cancer32
- Anemia30
- Peripheral nerve disease30
- Cardiovascular disease29
- Ischemic heart disease (IHD)28
- Crohn's disease27
- High blood pressure (hypertension)26
- Anxiety disorder25
- Ulcerative colitis (UC)24
- Biliary tract cancer23
- Chronic kidney disease (CKD)23
- Interstitial lung disease23
- Systemic lupus erythematosus (SLE)23
- Fallopian tube cancer22
- Fatty liver disease (MASH/NASH)20
- Graft-versus-host disease20
- Congenital heart disease19
- Eczema (atopic dermatitis)19
- Chronic obstructive pulmonary disease (COPD)18
- Myelofibrosis18
- Rheumatoid arthritis18
- Type 1 diabetes18
- Atrial fibrillation (AF)17
- Asthma16
- COVID-1916
- Epilepsy16
- Hodgkin's lymphoma16
- Human immunodeficiency virus infection (HIV)16
- Parkinson's disease (PD)16
- Autism spectrum disorder (ASD)15
- Cardiomyopathy15
- Chronic skin ulcer15
- Intellectual disability15
- Cystic fibrosis14
- Psoriasis14
- Alopecia13
- Sickle cell disease13
- Amyloidosis12
- Bipolar disorder12
- Multiple sclerosis (MS)12
- Psychotic disorder12
- Pulmonary hypertension12
- Thrombocytopenia12
- Thyroid cancer12
- Cutaneous T-cell lymphoma11
- Immune thrombocytopenic purpura (ITP)11
- Migraine11
- Motor neuron disease (MND)11
- Osteoarthritis (OA)11
- Peripheral vascular disease11
- Post-traumatic stress disorder (PTSD)11
- Systemic sclerosis11
- Thrombotic microangiopathy11
- Idiopathic inflammatory myopathy10
- Bile duct cancer9
- Diabetic eye disease9
- Dry eye syndrome9
- Hemophilia A9
- Insomnia9
- Narcolepsy9
- Peritoneal cancer9
- Alopecia areata8
- Glaucoma8
- Graves' disease8
- Hearing loss8
- Hidradenitis suppurativa (HS)8
- Macular edema8
- Ocular hypertension8
- Attention-deficit hyperactivity disorder (ADHD)7
- Essential thrombocythemia (ET)7
- Irritable bowel syndrome (IBS)7
- Low back pain7
- Neuroblastoma7
- Opioid use disorder7
- Psoriatic arthritis (PsA)7
- Sleep apnea7
- Spinal muscular atrophy (SMA)7
- Testicular cancer7
- Traumatic brain injury7
- Vasculitis7
- Abdominal aortic aneurysm6
- Abdominal cancer6
- Amyotrophic lateral sclerosis (ALS)6
- Down syndrome6
- Gallbladder cancer6
- Influenza (flu)6
- Post-transplant lymphoproliferative disorder6
- Smoking dependence6
- Alcohol dependence5
- Anal cancer5
- Epidermolysis bullosa5
- Gastrointestinal stromal tumor5
- Germ cell tumor5
- Gestational diabetes5
- Gout5
- Hemophilia B5
- Hereditary angioedema5
- Hypercholesterolemia5
- Neurofibromatosis5
- Polycythemia vera5
- Pompe disease5
- Schizoaffective disorder5
- Sjogren's syndrome5
- Tricuspid valve regurgitation5
- Acne4
- Acute coronary syndrome4
- Alpha-1-antitrypsin deficiency (AATD)4
- Axial spondyloarthritis4
- Fibromyalgia4
- Neurofibromatosis type 1 (NF1)4
- Pericarditis4
- Rhabdomyosarcoma4
- Scoliosis4
- Stargardt's disease4
- Urinary incontinence4
- Cannabis use disorder3
- Celiac disease3
- Cerebral palsy3
- Chronic idiopathic urticaria (hives)3
- Duchenne muscular dystrophy (DMD)3
- Endometriosis3
- Friedreich ataxia3
- Growth hormone deficiency3
- Huntington's disease (HD)3
- Overactive bladder (OAB)3
- Phenylketonuria (PKU)3
- Rett's disorder3
- Rotator cuff syndrome3
- RSV infection3
- Short-sightedness (myopia)3
- Ureteral cancer3
- Vascular dementia3
- Actinic keratosis2
- Cold agglutinin disease2
- Dysmenorrhea2
- Fabry's disease2
- Familial multiple polyposis syndrome2
- Female infertility2
- Food allergy2
- Frontotemporal dementia (FTD)2
- Hepatitis B2
- Hepatitis C2
- Hepatitis D2
- Hypertriglyceridemia2
- Neuromyelitis optica spectrum disorder (NMOSD)2
- Neuropathic pain2
- Postnatal depression2
- Primary sclerosing cholangitis2
- Progressive supranuclear palsy (PSP)2
- Prurigo nodularis2
- Spasmodic torticollis2
- Vitiligo2
- Vulvar cancer2
- Achondroplasia1
- Acromegaly1
- Ankylosing spondylitis1
- Behcet's syndrome1
- Birth control (contraception)1
- Bone cancer1
- Borderline personality disorder (BPD)1
- Chronic sinusitis1
- Complex regional pain syndrome (CRPS)1
- Eating disorder1
- Facioscapulohumeral muscular dystrophy1
- Frown lines (glabellar lines)1
- Fragile X syndrome1
- Functional dyspepsia1
- Hypothyroidism1
- Juvenile idiopathic arthritis (JIA)1
- Male infertility1
- Menopause symptoms1
- Methamphetamine dependence1
- Mucopolysaccharidosis type III1
- Obsessive-compulsive disorder (OCD)1
- Palmoplantar pustulosis1
- Perthes disease1
- Polycystic ovarian syndrome (PCOS)1
- Polymyalgia rheumatica1
- Prader-Willi syndrome1
- Primary biliary cholangitis (PBC)1
- Radiculopathy1
- Recurrent urinary tract infection (UTI)1
- Rhabdoid tumor1
- Takotsubo cardiomyopathy1
- Tenosynovitis1
- Thyroid eye disease1
- Tourette's syndrome1
- Tuberous sclerosis1
- Urethral cancer1
- Uveitis1
- Vaginal cancer1
870 more studies are for conditions not yet in our catalog.
Whom the studies accept
The share of the area's studies open to each group. A study can accept several.
- Adults 18 to 6494%
- Adults 65 and over86%
- Children and teens (under 18)19%
- Healthy volunteers10%
- Open to all sexes92%
- Women only4%
- Men only4%
155 studies are for children only.
Study phases
Earlier phases test safety in fewer people; later phases compare a treatment with the usual care in many.
- Early phase 11%
- Phase 113%
- Phase 1/210%
- Phase 221%
- Phase 2/33%
- Phase 323%
- Phase 42%
- No phase (device, behavioral and other studies)17%
- Not stated12%
Most active research sites
The sites recruiting for the most studies in the area.
- City of Hope Medical CenterDuarte481 studies
- Cedars Sinai Medical CenterLos Angeles322 studies
- UCLA / Jonsson Comprehensive Cancer CenterLos Angeles294 studies
- University Of California Los AngelesLos Angeles218 studies
- USC Norris Comprehensive Cancer CenterLos Angeles184 studies
- University of California, IrvineOrange157 studies
- Children's Hospital Los AngelesLos Angeles127 studies
- UC Irvine Health/Chao Family Comprehensive Cancer CenterOrange110 studies
- UCLA Hematology/Oncology - Santa MonicaSanta Monica86 studies
- Children's Hospital of Orange CountyOrange82 studies
- UCI Health - Chao Family Comprehensive Cancer Center and Ambulatory CareIrvine81 studies
- City of Hope at Irvine LennarIrvine78 studies
- University of Southern CaliforniaLos Angeles68 studies
- HOAG Memorial Hospital PresbyterianNewport Beach62 studies
- Kaiser Permanente Los Angeles Medical CenterLos Angeles52 studies
Cite these figures
Free to use under CC BY 4.0. Please credit LocalTrial with a link to this page.
Source: LocalTrial, Clinical trials in the Los Angeles area, https://www.localtrial.com/clinical-trials/california/los-angeles, updated November 12, 2026.
Source: <a href="https://www.localtrial.com/clinical-trials/california/los-angeles">LocalTrial, Clinical trials in the Los Angeles area</a>, updated November 12, 2026.
About these figures
Counted from ClinicalTrials.gov, the U.S. registry of clinical studies, for studies recruiting in the United States. A study is counted once however many sites it has in the area.
The area is the U.S. Census Bureau's Los Angeles-Long Beach-Anaheim, CA metropolitan area. Residents: 12,927,614, the Census Bureau's latest estimate. Updated November 12, 2026.
These figures describe studies, not advice. Talk to your doctor before joining one.
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