Coastal Internal Medicine

Dr. Mark O'Brien is fantastic. He's knowledgeable, patient and really listens. The staff is always friendly. I never feel rushed and he explains everything clearly. If you want a doctor who cares, I highly recommend Dr. O'Brien.

I'm truly grateful to have found Dr. O'Brien as my new primary care physician. From my very first visit, he made me feel seen and cared for. He took the time to do a thorough physical exam, ordered the necessary tests, and what really stood out personally followed up just days later to go over my results. That kind of attentiveness is rare. It's clear that Dr. O'Brien doesn't just treat symptoms, he builds relationships. He genuinely wants to stay connected and make sure his patients feel supported. I feel confident knowing my health is in good hands.

Dr. Mark Obrien, from the time he walks into the examination room he makes you feel comfortable relax and at ease. His services are very knowledgeable and professional he takes his time to explain what's going on with your body. He's a very good listener to whatever you want to say. Dr.Obrien is very thorough and considerate with his examinations of you. I'm very happy to have a noteworthy Dr. Mark Obrien as my primary physician.

My first visit to Coastal was fantastic! The facility is spotless, and Dr. O'Brien is an exceptional doctor who truly takes the time to listen. The staff is incredibly helpful and welcoming. I highly recommend this place and would give them 10 stars if I could!

I've been searching for a primary care physician who will work with me and who understands my specific health needs, and I was pleased to be referred to Dr. O'Brien. He is knowledgeable, listens, and is willing to consider new ideas to support my health. Very few medical doctors are familiar with nutrition and overall metabolic health concerning a keto/carnivore diet. Dr. O'Brien is. His staff is terrific, too. Dawn and Sherese are attentive and friendly. I feel well cared for.