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Personalized Primary Care the Way It Should Be

Merlin Direct Primary Care is a Family Medicine Clinic in San Antonio, Texas. We provide full-scope, patient-centered family medicine with enough time to address your individual health goals. We take the time to understand your health goals, listen to your concerns, and provide thoughtful, individualized care.

Become A Member

Through Direct Primary Care (DPC), we make that possible. For a straightforward annual membership, patients enjoy comprehensive services, including preventive care, acute visits, and office procedures.

Members Get Access To:

  • Sick visits
  • Wellness care for men, women and children
  • Management of chronic medical conditions
  • Direct access to your doctor by phone and text message
  • Coordination with hospital care docs
  • Thoughtful coordination with specialists when necessary
  • Transparent low negotiated prices on labs and radiology
  • Simple in office procedures
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Our Services

Specialized Care

Telehealth

Home Visits

Procedures

Labs

About Direct Primary Care

Merlin Direct Primary Care (DPC) was founded in 2025 by Dr. Ramón Diez-Barroso, MD, in the heart of San Antonio. Driven by a vision to provide patient-centered care with the time and attention every individual deserves, Merlin DPC was created as an alternative to rushed, high-volume healthcare. From the beginning, our mission has been to foster genuine relationships with our patients, offering high-quality, personalized primary care in a welcoming and accessible setting.

Quality Time Centered Around You

Whether you’re at home, at work, or traveling, you can call, text, or email your doctor whenever you need guidance

  • Virtual telehealth visits with your physician
  • Text or call with any health questions
  • Quick response times to your questions and concerns
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DIRECT PRIMARY CARE 

DIRECT PRIMARY CARE 

DIRECT PRIMARY CARE 

DIRECT PRIMARY CARE 

DIRECT PRIMARY CARE 

Our Mission

We are dedicated to providing simply better primary care. We provide thoughtful, comprehensive care that prioritizes your time, your health, and your peace of mind, when and how you need it. Our goal is to offer an experience that’s personal, reliable, and built entirely around you. With a focus on direct relationships, transparent pricing, and a full range of primary care services

Our Philosophy

This philosophy guides everything we do at Merlin DPC, from same-day visits and unlimited appointments to direct communication by phone or text and comprehensive services for patients and families.

At Merlin Direct Primary Care, we believe:

  • Healthcare should always put the patient first.
  • Medical care is not one-size-fits-all; each patient’s goals and needs are unique.
  • Doctors should have time to understand patients beyond their symptoms.
  • Appointments should never feel rushed or limited by the clock.
  • Primary care should improve health and lives, not just manage visits.
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Patient Reviews

Herman Romero

I truly appreciate the same day appointment option. I would definitely recommend.

Dawn Campbell

Dr Ramon Diez Barroso is the first person I| want to call about any question on my health or for my loved ones' health. His intentional way of listening and wanting to make sure he understands what you are feeling, makes me feel very good about his diagnosis. He has been 100% right on the mark and knows exactly what to do to make things better. Thank you

Travis Swisher

I came in thinking I had an eye infection because my eye was red and irritated, but it turned out to be a scratched eye. Doctor Diez-Barroso was very calm, thorough, and reassuring. He explained what was going on clearly and let me know it would heal on its own in a few days, which it did. I appreciated that he didn’t push unnecessary treatments and instead gave honest and helpful advice. Great experience overall!

Dr. Marcus Cavazos

As a dentist, I recognize quality healthcare, and Dr. Ramon Diez Barroso at Merlin Primary Care provides exactly that – it's truly outstanding. From thorough assessments to personalized treatment plans, Dr. Diez Barroso's expertise, professionalism, and reassuring demeanor set him apart. The entire staff makes you feel like family. For personalized, compassionate, and superior primary care in San Antonio, I highly recommend Dr. Diez Barroso and his team.

Allison Salido

Recently, while on vacation, I experienced a panic attack. Fortunately Dr. Ramon Diez Barroso was there He was so caring and immediately acknowledged my fears and concerns. His whole nature was very calming. He explained in simple and understandable language. What I needed to do. I immediately started to feel better. He was so compassionate and continue to follow up with me for the rest of the trip. So thankful.

Juliana Perez

Dr. Diez Barroso is very thorough, knowledgeable, trustworthy and patient. Whether I’ve come to him for general health concerns, postpartum complications, anxiety, or my 6-month-old’s overall health, he always has a solution. I never feel rushed through our consultations and always leave feeling confident in his diagnosis and treatment plan!

Adriana Casso

After battling breast cancer, I faced many lasting challenges from chemotherapy and other treatments. I saw several doctors, but none felt like the right fit for my complex case—until I found Dr. Diez Barroso. When I called, he personally answered and took the time to truly listen. His kindness, attentiveness, and clear explanations gave me hope for the first time that I could have a family doctor who understands my needs. I am deeply grateful to be under his care

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