Meet Our Providers

Pierre Gilles, MDPierre Gilles, MD

Dr. Pierre Gilles has served patients in the Valley for more than 25 years. He specializes in all aspects of general surgery. He uses minimally invasive techniques to perform a wide-range of advanced and complex hernia, bowel, spleen, and diaphragmatic procedures. As a participant in Breast Cancer Registry, Dr Gilles is current in education, surveillance and management of breast disease. Dr. Gilles and his entire staff are always eager to assist patients and families outside the operating room to ensure proper health surveillance and self care at home to avoid complications.

Medical Education/Training:

  • Residency: General Surgery, Huron Hospital, Cleveland Clinic, Cleveland, OH
  • Medical Degree: Northwestern University School of Medicine (6-year Honors Program), Chicago
  • Medical Education: Northwestern University Medical
    School–Honors Program
    Post Graduate Training: Huron Hospital, Cleveland, OH;
    Cleveland Clinic, Cleveland, OH

Special Interests

Dr. Pierre Gilles joined Abrazo Medical Group in November 2014. He is Board Certified in General Surgery and has 30 years’ experience in the Valley.  As an innovator in the field of Laparoscopic urgery, nearly 28 years ago, he uses minimally invasive techniques to perform a wide range of advanced and complex: hernia, bowel, spleen and diaphragmatic procedures. Dr. Gilles has long been involved in education of surgery and family practice residents, as well as Physician Assistant and Nurse Practitioner Students. He brings that same commitment to Patient Education including a strong emphasis in Health Surveillance. Dr. Gilles as participant in the Breast Cancer Registry is current in education, surveillance and management of Breast Disease.


  • Minimally Invasive/Advanced Laparoscopic Surgery
  • Colorectal, General and Acute Care Surgery
  • Breast Disease
  • Nutritional Support and Complex Wound Care


Karthik Raghavan, MD, FACS
Karthik Raghavan, MD, FACS

Dr. Karthik Raghavan joined Abrazo Medical Group in August 2015. With over 10 years of experience, Dr. Raghavan is Board-Certified in general surgery and is a fellow of the American College of Surgeons. Having pursued his initial surgical training in Chennai, India, he completed his residency training at Bronx Lebanon Hospital Center, NY. He held a faculty position at Staten Island University Hospital and academic teaching positions with State University of New York and American University of the Caribbean as Assistant Clinical Professor of Surgery. His special interests include advanced minimally invasive surgery, acute care surgery, general surgery, endoscopy with emphasis on minimally invasive colorectal surgery and surgical endoscopy. Dr. Raghavan and his staff strive to provide individualized quality centric surgical care to the community, with a special focus on patient education and partnership towards better outcomes.

Medical Education/Training:

  • Residency: Bronx Lebanon Hospital Center, Bronx, NY
  • Post Graduate Training: Stanley Medical College, Chennai, India, (M.S. General Surgery)
  • Medical Degree: Calicut Medical College, Kerala, India


Ramon Alba, DO
Ramon Alba, DO

Ramon Alba, DO has been practicing family medicine in the Maryvale, AZ area for over 43 years and recently joined Abrazo Medical Group in March 2016.

Dr. Alba offers a full spectrum of family practice care and treats patients of all ages with both acute and chronic medical illnesses.