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Marie Angelica A. Diaz

Marie Angelica A. Diaz, MD


"I strive to deliver patient care with compassion."

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Office Information

About Me

Are you suffering from diabetes or thyroid disorder? If so, learn what Marie Angelica A. Diaz, MD, at Avera Medical Group Endocrinology & Diabetes in Sioux Falls, SD can do to help you live a more healthy and active life. Inspired by family and a wonderful teacher, Dr. Diaz pursued her field of study to be able to help those with hormone-related health needs.

Expert Care for Your Endocrine System

Diabetes can be a challenging condition to live with every day, especially with insulin therapy. Dr. Diaz understands that specialized care for your endocrine system is what can make the difference in a healthy, fulfilling life. Treating adults, she is a board-certified doctor who has years of experience with conditions involving the body’s interconnected gland system.

Her specialties include:

  • Diabetes management and prevention
  • Metabolism and weight management
  • Thyroid disorders
  • Lipid disorders
  • Obesity
  • Adrenal disorders
  • Pituitary disorders
  • Calcium and bone disorders
  • Male and female reproduction

“Strive to maintain a healthy lifestyle,” says Dr. Diaz—whether eating healthy, exercising or keeping your mind healthy. She loves getting to know her patients and building relationships.

Dr. Diaz’s favorite part of medicine is caring for people. “I enjoyed treating patients,” she says of her studies in medical school. She has participated in research, is published in case reports—and has presented on endocrine topics at universities and national meetings.

Active Lifestyle

In her free time, Dr. Diaz loves going for walks with her Siberian husky. She speaks Filipino and is originally from Manila.



University of Santo Tomas, Manila, Philippines, Medical School


Monmouth Medical Center, Long Branch, NY, Internal Medicine


University of Florida College of Medicine, Jacksonville, Endocrinology, Diabetes & Metabolism

Professional Memberships

  • American Association of Clinical Endocrinologists
  • Endocrine Society
  • American College of Physicians


  • American Board of Internal Medicine - Endocrinology, Diabetes, and Metabolism
  • BLS
  • ACLS

This directory contains information about the provider members of Independent Health Care Associates, Avera Health and all Avera entities, members of the Avera Medical Group, and employed select providers with Avera McKennan, Sioux Falls, SD and Avera Marshall, Marshall, MN and physicians with hospital privileges at Avera St. Luke's, Aberdeen, SD; Avera Sacred Heart, Yankton, SD; Avera Queen of Peace, Mitchell, SD; Avera St. Mary's, Pierre, SD.

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Moving Health Forward

Avera is a health ministry rooted in the Gospel. Our mission is to make a positive impact in the lives and health of persons and communities by providing quality services guided by Christian values.

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