Coastal Internal Medicine

Coastal Internal Medicine Fully Dedicated Internal Medicine Care to Guide You Through Your Journey to Health

02/27/2026

Getting to know Dr. O 💙
Dr. Mark O’Brien’s career is fueled by the wellbeing of his patients. There’s nothing more rewarding than seeing the positive changes in their lives and knowing his care helps them live healthier, fuller days. Your health is his passion, and your progress is his greatest motivation. 🌿

Looking for a personalized, holistic approach to your health with a doctor who builds real relationships with is patient...
02/25/2026

Looking for a personalized, holistic approach to your health with a doctor who builds real relationships with is patients and focuses on long term wellness and healthy lifestyle guidance? 🌞🌿 Come join Coastal Internal Medicine.

02/24/2026

Taking supplements…. Is it worth it? Dr. O says, not really… unless you need it for a health condition. Your diet should be doing the work.

While the science is fascinating, my relationship with patients is immensely important to my practice. In fact, there is...
02/20/2026

While the science is fascinating, my relationship with patients is immensely important to my practice. In fact, there is research that shows a good patient-doctor relationship improves results! Where there is trust and support, there is better health!

02/18/2026

I trust what you're telling me. You know your body best. I’m here to listen and guide you to resolution. 🌞

Keeping San Diego happy and healthy for over 25 years! 🌿 Come join Coastal Internal Medicine.

Find your best self here. Where you time, wellbeing, and education is a priority. Come to Coastal Internal Medicine for ...
01/30/2026

Find your best self here. Where you time, wellbeing, and education is a priority. Come to Coastal Internal Medicine for the personal healthcare experience you have been looking for. 💙

Looking for care that’s close to home and focused on you?At Coastal Internal Medicine, Dr. Mark O’Brien offers decades o...
01/28/2026

Looking for care that’s close to home and focused on you?
At Coastal Internal Medicine, Dr. Mark O’Brien offers decades of experience, same-day availability, and a commitment to educating every patient about their health.
Make the move to CIM — where quality care feels personal. 🌿

01/26/2026

Your feelings matter.🌞 Your health, your voice, your path. At Coastal Internal Medicine, this is where your health is yours. 💙

We’re grateful for every patient who trusts us with their care. Your kind words remind us why we do what we do every day...
01/23/2026

We’re grateful for every patient who trusts us with their care. Your kind words remind us why we do what we do every day. Thank you for being part of the Coastal Internal Medicine family.

Looking for a new doctor? Make the move to Coastal Internal Medicine — your local practitioner with decades of experienc...
01/22/2026

Looking for a new doctor? Make the move to Coastal Internal Medicine — your local practitioner with decades of experience, same-day appointments, and visits that put you and your health first. 🩺
We’re here to help you understand, prevent, and take charge of your wellness.

Same-Day appointments because your health matters every day. 🩺At Coastal Internal Medicine, Dr. Mark O’Brien offers deca...
01/22/2026

Same-Day appointments because your health matters every day. 🩺
At Coastal Internal Medicine, Dr. Mark O’Brien offers decades of experience, efficient bookings, and visits designed to educate you about your body and wellbeing.
Make the move to care that puts you first and keeps your health on track. 🌿

01/21/2026

We believe you. We hear you. Your health shouldn’t wait. If something feels off, schedule an appointment. Same-day visits available. 🌞🌿

Address

161 Thunder Drive Suite 210
Vista, CA
92083

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