Clinical trials · California
Rare Diseases clinical trials in California
We’re tracking 9 recruiting rare diseases studies with a site in California, each written for real people, not researchers.
Recruiting studies in California
- NCT06539169Recruiting
Following people with rare diseases over time
This study follows people with rare diseases over time to learn more about how these conditions progress and how they are treated. Joining may help researchers understand your disease better and find better ways to care for others.
Los Altos, CaliforniaAges Any age - NCT01440218Enrolling by invitation
Study for rare illnesses and treatment reactions in families
This trial looks for answers in rare illnesses that either have no known cause or have not improved with usual treatments. It also studies rare harmful reactions that happen after medicines, vaccines, or medical devices, and may involve family members of the affected person.
La Jolla, CaliforniaAges Any age - NCT05139797Recruiting
AI-guided heart ultrasound screening for suspected amyloidosis
This study tests whether an artificial-intelligence system can help decide who should get a special heart workup for a rare disease called cardiac amyloidosis. If you have signs that make doctors suspect this, the AI-guided ultrasound screening may help find it sooner.
Los Angeles, CaliforniaAges 18 years+ - NCT06265103Recruiting
Epilepsy learning healthcare system registry
This is a registry study that collects information from people being treated for epilepsy at participating healthcare centers. The goal is to improve care by learning from real-world patient data.
Los Angeles, CaliforniaAges Any age - NCT06144957Enrolling by invitation
SLC13A5 deficiency natural history study (US only)
This study follows people with SLC13A5 deficiency (a rare genetic condition that affects brain development) to learn more about the disease over time. It collects health information, assessments, and samples to help understand the condition and plan future treatments.
Palo Alto, CaliforniaAges Any age - NCT04681781Enrolling by invitation
Remote study of SLC13A5 deficiency history
This study follows people with SLC13A5 deficiency to better understand how the condition changes over time, using surveys and clinical check-ins done remotely. If you (or your child) have this genetic condition, it may help researchers learn what symptoms to expect and how to track them.
Palo Alto, CaliforniaAges Any age - NCT04398628Recruiting
Study of non-cancer blood disorders in people with bleeding or clotting
This study follows people with inherited or acquired non-cancer blood disorders to better understand symptoms, causes, and how different treatments work over time. You may be placed into a disorder-specific group, depending on your diagnosis and testing results.
Los Angeles, CaliforniaAges Any age - NCT05589714Recruiting
Study your rare eye gene and track retinal disease over time
This study builds a registry and tracks the natural history of rare retinal dystrophies while also testing people for disease-causing gene variants. It may help researchers better understand what causes retinal degeneration and how it progresses.
Los Angeles, CaliforniaAges 4 years+ - NCT02285582Recruiting
Rare blood disorder registry for histiocytic conditions
This study is a registry that collects information about people diagnosed with rare histiocytic disorders. It helps doctors better understand these conditions over time and may improve future care.
Los Angeles, CaliforniaAges Any age
Rare Diseases trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting rare diseases studies listed above.
- Children's Hospital Los Angeles · 3 studies
- Lucile Packard Children's Hospital at Stanford · 2 studies
- University of California, San Francisco · 2 studies
- University of Southern California · 2 studies
- Cedars-Sinai Medical Center
- Hemophilia and Thrombosis Treatment Center at UC San Diego Health
- Loma Linda Hemoglobinopathy and Inherited Bleeding Disorder Program
- Orthopaedic Institute for Children
What taking part in a rare diseases study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Rare Diseases trials in other states
Common questions
- Are there rare diseases clinical trials in California?
- Yes. We're currently tracking 9 recruiting rare diseases studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a rare diseases study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a rare diseases trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New rare diseases studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.