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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.

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

PCMH Certificate


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We will respond within 24 to 48 hours. 

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


Rafael Guillen, MD
800 Grand Concourse, Suite #5
Bronx, NY 10451
Phone: 347-696-7592
Fax: 718-401-2322

Office Hours

Get in touch


Rafael Guillen, MD, FACP
800 Grand Concourse
Suite #5
Bronx, NY 10451