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Contact Rafael A. Guillen, MD, FACP

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800 Grand Concourse
Suite #5
Bronx, NY 10451

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Send A Message To Rafael A. Guillen, MD, FACP

If you have any questions, concerns, or comments regarding Dr. Rafael Guillen, please fill out the short contact form below.

Our office line is available 24/7, 365 days a year at 718-401-2300.


About Bronx

If you are in need of Internal Medicine services in Bronx, NY, Rafael Guillen, MD is here to serve you. Our office provides a variety of services, including Hepatitis, Asthma, Obesity, and Asthma to our patients with care and expertise. Rafael Guillen, MD has served many happy patients of the Bronx community. We hope to see you in our office soon!


Bronx is located in Bronx County, near the cities of Pelham Manor, NY and Englewood Cliffs borough, NJ. The city is home to a variety of schools, including Dewitt Clinton High School, and colleges such as Fordham University and Monroe College. Patients of our practice can enjoy local attractions and activities in Bronx such as New York Botanical Garden, Yankee Stadium, and Bronx Zoo. After your appointment, grab a bite to eat at one of Bronx's many lively restaurants, including Louie & Ernie's Pizza or Antonio's Trattoria.


See What Our Patients Say About This Location:


Tito P

November 08, 2020



Willie L

October 24, 2020


Good timing and care they show

Domingo D

October 22, 2020


Very good


October 16, 2020


Dr.rafael Guillen was very helpful.

Jose M

October 16, 2020

Dr. Rafael A. Guillén is an internist in the Bronx, in New York City. As the physician at R. Guillén MD PC, Dr. Guillén offers a wide range of care including allergy care, help with obesity, hepatitis care, diabetes care, cholesterol management, high blood pressure treatment, asthma treatment, and arthritis treatment. R. Guillen MD PC is a Patient-Centered Medical Home, recognized by the National Committee for Quality Assurance for providing coordinated, advanced primary care, ensuring that patients are put in the forefront of their care, and a commitment made for continuous quality improvement. Dr. Guillén offers comprehensive health care for adults in the Bronx area. He’s bilingual in English and Spanish and has also carefully chosen a multi-lingual staff for the convenience of his patients.

Dr. Guillén attended the University Eugenio Maria de Hostos School of Medicine in the Dominican Republic. He completed his residency in Internal Medicine at the Bronx-Lebanon Hospital Center in the Bronx, New York. Dr. Guillén is a Diplomate of the American Board of Internal Medicine, and a Fellow of the American College of Physicians. He is an active member of numerous medical organizations, including the American Medical Association, the American College of Physicians, and the Dominican College of Physicians.

Dr. Guillén and his team look forward to seeing new patients and established patients alike. Contact the office anytime to arrange an appointment.

What we offer


Insurance Coverage

Medical insurance representative visits the office weekly to help patients enroll in a plan if they do not have one. Please contact us to find out when an Insurance representative will be available in practice.

Affinity Health Plan
Amerigroup / Healthplus
Empire Blue Cross Blue Shield
Oxford Freedom
United Healthcare
Our Team

We are here to help

  • Christine E Mirelys
    Christine Mirelys
  • Marlyn  Moquete
    Marlyn Moquete
    Medical Assistant
  • Stephanie  Abreu
    Stephanie Abreu
    Quality Care Specialist