Skip to main content

Comprehensive Rheumatologic Care at the Cohen Center

At the Cohen Center, we offer complete rheumatologic and musculoskeletal consultations, infusions for a wide variety of needs and disorders, diagnostic imaging, ultrasound-guided injections of joint medications, personal growth factor and progenitor injections, and osteoporosis therapies. Our facilities are equipped with sophisticated diagnostic equipment such as a high-frequency MRI, digital x-ray, ultrasound, and DEXA scan machines. We offer our patients on-site laboratory services for their convenience. Our supervising physician is dual-certified in internal medicine and rheumatology, and works side-by-side with certified physician assistants to provide quality, accessible, and efficient patient care.

Meet Our Team

Meet Shariar Cohen, M.D

Founder, CEO, and President of Cohen Medical Centers.

Shariar Cohen, M.D. is a board-certified rheumatologist. He received his undergraduate degree, with honors, from The University of California San Diego in 1997. He obtained his medical degree from Ben-Gurion University of the Negev in Israel through an international medical collaboration program with Columbia University in New York. Dr. Cohen completed his residency in internal medicine at LAC-USC Medical Center and his fellowship in rheumatology at The University of California Los Angeles. Dr. Cohen is known for his extraordinary dedication to patients and his ability to diagnose complex conditions. Dr. Cohen seeks to enhance patient care by adhering to the highest standards of medical care while relying on cutting-edge technology and medical research. Dr. Cohen is board-certified in both internal medicine and rheumatology. His background in internal medicine has made him particularly good at adopting a holistic view of the patient’s health, and a leading specialist in managing complex autoimmune disorders. His extensive medical expertise and quality patient care have made him a recognized rheumatologist to celebrities and other VIPs. Dr. Cohen has received numerous professional awards and patient accolades for his compassionate care. Dr. Cohen’s ongoing involvement in clinical research ensures that he is always aware of the latest scientific breakthroughs and can offer his patients the most up-to-date treatments.

Meet Maaya Ono, PA-C

Maaya Ono, PA-C graduated from Touro University in 2020 with a Masters in Physician Assistant Studies.

Maaya was born in Tokyo, Japan and raised in Palos Verdes, California. She completed her undergraduate studies at UCLA and graduated from Touro University in 2020 with a Masters in Physician Assistant Studies. During her time at Touro, she enrolled in a rheumatology clinical rotation and immediately knew she wanted to expand her knowledge and experience in the field. On weekends, she enjoys spending time outside, finding new restaurants, and spending time with her friends & family, but mostly her cat, Tiki.

Emily Tejeda, MMS, PA-C

Board Certified Physician Assistant, Specializing in Dermatology.

Raised in Agoura Hills, Emily’s academic journey began with the completion of her Bachelor of Science degree in Biology at University of California, Los Angeles (UCLA), where she graduated with departmental honors. She continued her education at Marshall B. Ketchum University in Orange County, earning a Master of Medical Science degree in Physician Assistant (PA) Studies. Prior to her enrollment in PA school, Emily immersed herself in the field of dermatology, undergoing six years of preparation and training at practices across the Greater Los Angeles area. She is board certified by the National Commission on Certification of Physician Assistants (NCCPA) and licensed by the Medical Board of California.

With a focus on evidence-based medicine and a patient-centered approach, Emily offers comprehensive dermatological services, including skin cancer screenings, mole removals, and customized treatment plans for conditions such as acne, eczema, psoriasis, and skin cancer. She is dedicated to providing personalized care to each patient, focusing on both medical and cosmetic dermatology treatments. She takes pride in building strong relationships with patients and empowering them to make informed decisions about their skin health.

Victor Ochoa

Infusion Center Manager

Grace Yin

Registered Nurse (RN)

Carmela Torres

Medical Assistant & Specialty Pharmacy Coordinator

Macie Arguelles

Medical Assistant

Madison Jean (MJ) De Vere


Cate Schroeder


Cristian Garcia

X-Ray Technician

Cate Schroeder


Logo for Cohen Medical Centers in Thousand Oaks, CA


Call (805) 449-8781 or fill out the form below to request a consultation.

    Contact Our
    Office Today

    CONTACT US(805) 449-8781
    Contact Us 805.449.8781