• Answering the Call 
      ​to a Healthier Future


    Apex Research Group (ARG) is a clinician-led clinical research site organization. We are committed to preserving the health and  well-being of the general population by being a liaison between Sponsor companies, Clinical Research Organizations (CROs) and prospective clinical trial participants. We believe that improving access to clinical research is crucial for improving medical care and that broad representation in clinical trials is critical for the advancement of medicine for all.

    Sponsors and CROs partner with us to develop effective solutions for disease prevention and to address unmet medical needs. Our infrastructure enables us to implement protocols for single-site studies or participate in large, complex, global studies in Phases I – IV in a wide range of therapeutic areas.

    Apex Research Group is dedicated to researching diagnostics, medical devices and therapeutics used in preventive care and treatment. As a multi-specialty clinical site our facilities provide access to clinical labs  as well as a wide array of medical and surgical equipment, thus enabling the conduct of Phase I-IV clinical trials.

    With the singular goal of addressing unmet medical needs, we connect participants to clinical investigation and conduct studies on behalf of sponsors with promising investigational products in their pipelines that include vaccines,  pharmaceutical medicines and medical devices. We are connected to several Urgent Care clinics throughout Sacramento and our network allows us to use practical recruitment approaches to reach a wide range of potential study participants, in order to fulfill study needs.


    The Apex Research Group clinical investigation team consists of clinical investigators who are specialized physicians, certified CPR and ACLS staff, advanced practice clinicians and certified clinical research coordinators with decades of combined experience conducting clinical research. All our staff are GCP, HIPAA, IATA and OSHA trained. With wide-ranging knowledge about the clinical trial landscape, we are committed to ensuring that all studies are conducted with the highest integrity to produce high quality data. With a focus on participant safety, we employ a patient-centric approach to conducting clinical research and are guided by the ethical principles that support compassionate patient care.

    Dr. Masaru (Rusty) Oshita
    Owner, Chief Medical Director and Principal Investigator


    Our Principal Investigator and Co-founder Dr. Masaru “Rusty” Oshita, is a board-certified Emergency Medicine physician with extensive experience in patient care and entrepreneurship.  He runs a network of Urgent Care centers throughout Sacramento and is dedicated to providing thoughtful medical care in the community. During the height of the COVID-19 pandemic he worked closely with the County Public Health Department and community leaders to organize and implement several mass vaccination clinics. Dr. Oshita is passionate about clinical trial research and was instrumental in leading several clinical trials focused on developing preventive and therapeutic treatments for COVID-19 infections.

    Nav Nagra Kooner
    BSN, CCRC Owner and Chief Executive Officer


    Co-founder Nav Nagra-Kooner BSN, CCRC serves as Chief Executive Officer at Apex Research Group. Nav holds a Bachelor of Science degree in Nursing from the University of Luton (UK). With a background in nursing and a career spanning nearly 20 years in the clinical trial industry, Nav holds participant safety, integrity and data quality to the highest regard. She has led clinical investigation teams in leadership roles such as Site Director, Director of Quality Control and has amassed a range of operational skills. With her extensive knowledge and operational skills, Nav has successfully led teams and brings a strong portfolio of experience in managing and executing clinical trials in multiple therapeutic areas including vaccines, infectious disease and more. One of her most cherished roles at ARG is establishing, implementing, and maintaining procedures to ensure strict compliance with industry standards. 

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    Therapeutic Areas of Interest

    • Allergy
    • Cardiovascular
    • Consumer health
    • Dermatology
    • Endocrinology
    • Gastroenterology
    • Infectious disease
    • Metabolic disorders
    • Obesity
    • OB-GYN
    • Orthopedics
    • Pain management
    • Pulmonary disease
    • Smoking cessation
    • Urology
    • Vaccines 
    • Healthy subjects
    • Pediatrics, Adolescents
    • Women's health

    Sponsors & CROs

    We invite you to partner with us to conduct clinical trials for investigational products across these therapeutic areas.  We have access to a wide range of potential participants of all age groups who may be suitable referrals for a variety of clinical research areas. We are connected to a network of Urgent Care facilities throughout Sacramento that record over 25,000 visits per year, which means that we can readily fulfill your study enrollment goals. Our PBMC capabilities and 24-hour emergency line service allows us to ensure that all protocols are run smoothly.

    For Phase I-IV clinical trials, single-site or high volume, from patient recruitment to data output analysis, our clinical investigation team will staff and support your clinical research needs.
    Go To Form

    If you are conducting a study and are interested in partnering with ARG, we want to talk to you.

    Our Services Include

    Protocol Design Review

    We proactively vet study protocols to confirm alignment with study goals. We look for potential risks of amendments and delays and recommend adjustments to facilitate the smooth and timely conduct of our studies.

    Participant Recruitment, Screening, Enrollment, and Engagement

    With our broad patient database, participant recruitment, enrollment and retention goals are easily met and maintained throughout the life of our studies.

    Clinical Trial Conduct

    Our clinical investigation team is led by qualified physicians who bring decades of experience in patient care and clinical research and are equipped to execute wide-ranging protocols.

    Internal Quality Assurance

    All studies are conducted with the highest integrity and we remain committed to delivering quality data in compliance with industry standards.

    Decentralized Trials

    As a multi-specialty clinical research site with equipment and facilities that enable out-patient trials, we have the ideal setup for decentralized trials.

    What Apex Research Group can offer

    • A network of specialized physicians and advanced practice clinicians
      to serve as Investigators
    • A team of leaders with thorough FDA experience
    •     Internal Quality Assurance
    • Certified CPR and ACLS staff
    • GCP, CITI, HIPAA, IATA, & OSHA trained staff
    • Creative patient recruitment approaches with direct access to several
      owner owned Urgent Cares
    • Ability to conduct outpatient trials in Phases I-IV
    • e-Source and decentralized trial (DCT) capabilities
    • 24-hour emergency line/staffing
    • Experience in high enrolling vaccine trials with involvement
      from diverse populations
    • PBMC Capabilities

    ARG Investigator Inquiry Form

    For Participants

    Why should you join a research study? 

    Apex Research Group employs clinical staff who are themselves healthcare professionals  that care for patients in the community. Our team of clinical investigators are invested in patient care and finding effective treatment for patients with  unmet medical needs.  We will connect you with the studies that match your interests and  needs as well as  guide you through the entire clinical trial process. 

    Go To Form

    Research Participant Interest Form