Where curiosity becomes care.
APEX is San Diego's trusted clinical research site. For two decades we've turned questions into therapies — partnering with sponsors, supporting investigators, and protecting the patients who make breakthroughs possible.
Breakthroughs Should Benefit Everyone
That's why APEX actively recruits across age, gender, race, and ethnicity groups—lowering barriers with bilingual materials, community partnerships, and culturally responsive care.
A Trusted Clinical Site with 20+ Year Experience
Proven Track Record
For over two decades, APEX has partnered with the world's leading pharmaceutical and biotech companies to deliver high-quality clinical research. Our proven track record speaks for itself.
These partnerships reflect our commitment to operational excellence, regulatory compliance, and patient-centered care.
"Patients are waiting and we are here to help"
— APEX Clinical Research Team
Built for results.
Wired for relationships.
For over two decades, APEX Clinical Research has operated with one mission: to improve lives through ethical, efficient, and people-centered clinical trials. As part of the Sensorium Clinical Research network, we now combine that local San Diego expertise with national infrastructure, shared sponsor relationships, and unified quality standards.
From bustling protocols to first-time volunteers, every interaction is built on trust, transparency, and clinical rigor.
Why You Need APEX
in Your Clinical Trial
APEX brings a rare combination of investigator ownership, multi-specialty expertise,
and deep therapeutic area experience to San Diego. With 153 trials completed across 12+ therapeutic areas since 2005,
our four investigators have collectively participated in trials with three serving as Principal Investigator and one as Sub-Investigator.
Why APEX Stands Apart
Investigator-Owned Leadership
Unlike sites dependent on rotating staff or corporate CRO models, APEX is led by experienced investigators who have invested their careers in research integrity and sponsor partnership.
Staff Continuity & Protocol Quality
Our team ensures direct oversight of protocol consistency. Supported by Sensorium's dedicated rater team, this continuity translates to lower screen-fail rates, higher retention, and faster enrollment cycles.
Diverse Recruitment Infrastructure
15,000+ patient database with proactive prescreening and a demographically diverse San Diego catchment (30–35% Hispanic/Latino, 25–30% African American, 40–45% Caucasian). Bilingual operations remove recruitment barriers.
Vaccinology Leadership
28+ vaccine trials spanning influenza (mRNA, cell culture, VLP), COVID-19/SARS-CoV-2, Ebola, RSV, meningococcal, Zika, smallpox, and anthrax — covering Phase 1 safety through Phase 3 pivotal studies.
Respiratory Medicine Excellence
Deep pulmonary expertise with 60 trials in asthma, COPD (including dupilumab/biologics), IPF, bronchiectasis, and refractory chronic cough — across all phases including Phase 4 and biologics.
Proven Enrollment Excellence
APEX has been named a top enrolling site across multiple sponsor study newsletters, demonstrating consistent excellence in patient recruitment and trial execution.
Active studies in San Diego
Lipid management in adults with familial hypercholesterolemia
Ages 18–75 · 6-month commitment · Up to $1,200 compensation
Learn MoreOnce-weekly therapy for Type 2 diabetes & weight
Ages 21–70 · 12-week visits · Up to $900 compensation
Learn MoreTreatment-resistant depression: novel oral therapy
Ages 18–65 · 4-month study · Up to $1,500 compensation
Learn MoreNon-hormonal therapy for vasomotor symptoms
Ages 40–65 · 3-month study · Up to $800 compensation
Learn MoreNon-opioid post-surgical pain management
Ages 18+ · Single-center · Up to $600 compensation
Learn MoreAdult RSV vaccine immunogenicity study
Ages 50+ · 2 visits · Up to $400 compensation
Learn MoreMeet the APEX Team
Our leadership team brings decades of combined experience in clinical research, patient care, regulatory compliance, and operational excellence. Together, we're committed to advancing healthcare through integrity, innovation, and compassion.
Leadership Team
Mr. Daravan Rath
PharmD
Daravan Rath, PharmD
Site Director of Apex Clinical Research, leading strategic vision and operational oversight. With a background as a pharmacist and pharmaceutical industry experience, Daravan brings clinical insight combined with business leadership to clinical trial execution.
Dr. Patrick Yassini
MD, Principal Investigator
Dr. Patrick Yassini, MD
Medical Director & Principal Investigator with over 25 years of clinical experience. Dual board-certified in family medicine and integrative holistic medicine. Known for exceptional reputation in vaccines, obesity, respiratory, neurology, and dermatology trials.
Dr. Edward Federman
MD
Dr. Edward Federman, MD
Board-certified pulmonologist and critical care specialist with over 40 years of clinical experience. Expertise in COPD, asthma, interstitial lung disease, pulmonary hypertension, and vaccines. Maintains hospital affiliations across San Diego.
Clinical Research Team
Ms. Carla Diaz
NP, FNP-C
Ms. Carla Diaz, NP
Nurse Practitioner certified in Family Practice with extensive ICU experience. Known for exceptional attention to detail, leadership, and dedication. Ensures every aspect of clinical research—from patient safety to regulatory compliance—is executed to the highest standard.
Ms. Kaitlin Fredeluces
Assistant Site Manager
Kaitlin Fredeluces
Clinical Research Coordinator with experience managing trials across dermatology, vaccines, and respiratory conditions. Known for her diligence and patient-first mindset. Consistently achieves high participant retention and engagement.
Cheyenne
Clinical Research Coordinator
Jasmine
Clinical Research Coordinator
Amy
Clinical Research Coordinator
Natosha
Clinical Research Coordinator
Ketsala
Clinical Research Coordinator
Community roots. Network strength.
APEX is deeply rooted in San Diego's vibrant community — fast-moving, diverse, and innovation-driven. As part of Sensorium, we combine local culture with enterprise resources, so every patient gets personalized attention and every sponsor gets the reliability they need.
SoCal energy
Active, engaged patients. Median 21-day site activation. We move at the pace San Diego brings.
Biotech corridor
Minutes from Torrey Pines — the densest biotech cluster in America. Sponsors and PIs are neighbors here.
Veteran-ready
San Diego VA proximity means strong service-member and military-family enrollment pipelines.
Bilingual by default
Cross-border patient population — Spanish/English coordinators on every study, every visit.
Ready to elevate research together?
Whether you're a sponsor, investigator, or volunteer, let's take the next step in transforming healthcare — together.
San Diego, CA 92120
Interested in Joining a Clinical Trial?
Fill out the form below and our clinical team will reach out to you with information about available studies.