About
Dr. Shariar Cohen is a dual board-certified rheumatologist and internist serving the Ventura County area from Thousand Oaks. He founded Cohen Medical Centers to deliver hospital-grade, evidence-based rheumatologic care with a strongly personal touch. His clinical expertise spans the full spectrum of rheumatologic disease, including rheumatoid arthritis, lupus, psoriatic arthritis, scleroderma, vasculitis, Sjogren's syndrome, ankylosing spondylitis, osteoporosis, and gout. He also holds deep expertise in rare conditions such as IgG4-related disease and IBD-related arthropathy.
Dr. Cohen brings advanced procedural skills to every patient encounter. He performs ultrasound-guided joint injections, biologic infusion therapy, and shockwave therapy in-house. As lead researcher on multiple clinical trials, he has participated in Phase III randomized, double-blind, placebo-controlled studies, including a multicenter trial of subcutaneous secukinumab. His work in clinical research keeps his practice at the forefront of emerging rheumatologic treatments. Dr. Cohen has earned national recognition for his diagnostic precision and compassionate approach to patient care.
Certifications
Conditions Treated
Who is Dr. Cohen right for?
Dr. Cohen is a strong fit for patients managing complex or difficult-to-diagnose rheumatologic conditions. Adults with autoimmune diseases such as lupus, psoriatic arthritis, or scleroderma benefit from his deep specialty expertise. Patients with rare conditions like IgG4-related disease or IBD-related arthropathy find his diagnostic precision especially valuable. Those who want direct, 24/7 access to their specialist can enroll in his Extended Access program. Patients interested in clinical trial participation also find a natural home in his practice.
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Frequently Asked Questions
Dr. Cohen specializes in the full spectrum of rheumatologic disease. He treats rheumatoid arthritis, lupus, psoriatic arthritis, scleroderma, vasculitis, Sjogren's syndrome, ankylosing spondylitis, osteoporosis, and gout. He also holds expertise in rare conditions including IgG4-related disease and IBD-related arthropathy.
Yes. Dr. Cohen holds dual board certification in both rheumatology and internal medicine. This dual certification reflects his expertise across specialty rheumatologic care and broad primary care medicine.
Dr. Cohen performs ultrasound-guided joint injections, biologic infusion therapy, and shockwave therapy directly at Cohen Medical Centers. He also offers regenerative treatments including PRP injections, stem cell injections, and MVT injections. Having these services in-house reduces the need for outside referrals.
Yes. Dr. Cohen serves as lead researcher on multiple clinical trials. His research includes Phase III randomized, double-blind, placebo-controlled studies. He participated in a multicenter trial of subcutaneous secukinumab. Patients interested in trial participation can ask about current studies during their visit.
Patients enrolled in the Extended Access and Direct Primary Care program can contact Dr. Cohen 24 hours a day. The program also includes same or next-day appointments and priority specialist referrals. Ask the practice about enrollment to learn more about this option.
Dr. Cohen pairs precise diagnostic evaluation with evidence-based treatment planning. He has earned national recognition for his diagnostic accuracy. His in-house imaging and procedural capabilities support faster, more thorough assessments without sending patients to outside facilities.
Yes. Dr. Cohen holds board certification in internal medicine alongside his rheumatology certification. Through the Extended Access and Direct Primary Care program, he provides primary care services with direct physician access. This hybrid model lets patients address both specialty and general health needs with one physician.
Doctor profile last updated March 21, 2026