Yogesh Trehan M.D., Inc.
Internal Medicine and Geriatric Medicine

Brian Reyes, M.D.
Internal Medicine

100 Cortona Way, Suite 140 Brentwood, CA 94513
(925) 516-4488


All co-payments are due at the time of checking in for an office visit. For your convenience we accept Visa and Mastercard payment.

We request that you provide us with 24 hours notice of cancellation if you are unable to make a scheduled appointment.

New patients are encouraged to arrive 15 minutes before the appointment time to complete paperwork. For your convenience, you may register from the comfort of your home and complete your health history forms securely online by clicking on this link to the web portal. If you do not have a password, please call our office to get one.


We accept Medicare, Tricare, Medicare HMO plans including HealthNet Seniority Plus, Scan, Humana and United Healthcare/AARP.

We participate in John Muir Health Network and Sutter Delta Medical Group HMO’s and are accepting new patients with both medical groups.

We are preferred providers (in network) for most PPO’s including Aetna, Cigna, Blue Cross, Blue Shield, Healthnet, and United Healthcare.

We also accept all Union insurances including Operating Engineers, UFCW, Laborers and Teamsters.

Starting in 2014, we also accept all private insurance plans offered through the Covered California website.