Meet Our Clinic Team

Director of Clinic Operations
Linda Do, FNP-BC, CDE, CDTC is a native of Southern California. She went to UC Irvine majoring in Biology with a specialization in molecular and biochemistry as well as majoring in Spanish with a specialization in culture and literature. Transplanted to New York City and graduated from PACE University to become a family nurse practitioner. She spent 11 years practicing in a pediatric endocrinology office. Linda obtained her CDE (Certified Diabetes Educator) certification and placed her emphasis on creating a diabetes education and management expansion component, both inpatient and outpatient, which also included insulin pumps. She joined Accuchek Roche Diabetes Care as a clinical specialist in the NYC area continuing to provide diabetes education, management, and training to local communities. Linda then rejoined the clinical world, practicing in an internal medicine department until her realization was that she wanted to continue her focus on the diabetes community. She joined DTCI in January 2018 to continue to provide diabetes care to patients facing the co-morbidities of diabetes complications. Linda is actively involved with local animal shelter in her spare time and serves as a small animal advocate. She also volunteers with her church.

Meet Our Practice Team

John Bell
Vice President of Business Affairs
Terrea Fields-von Hurwitz, RDHEF
Chief of Staff
Madeline Betancourt
Director of Billing and Practice Operations
John Schulenburg
Director Outreach & Development
Linda Figueroa
Facilities Manager

Meet Our Management

Lon G. von Hurwitz
Mr. von Hurwitz has over 30 years of experience as a senior executive in health and wellness solution development and marketing. He launched the Diabetes Treatment Centers International in 2016 and is currently serving as President. Formerly, he was Co-Founder and CEO of World Health Networks, Inc. where he started the Coalition for Healthful Airports in partnership with the Airports Council International (ACI), the International Air Transport Association (IATA), the Airline Medical Directors Association and the World Heart Federation. This global initiative supplies state of the art, networked, non- invasive biometric health stations in leading airports around the world. Prior to this, at Lifeclinic International, Mr. von Hurwitz was President Sales, Marketing and Retailer Relations for a network of 23,000 self service health stations placed in the pharmacies of virtually all major chain drug stores in North America including Wal-Mart, Kroger, Safeway, CVS, Rite Aid, Target, Kmart, Albertson’s, etc. Annual usage of the health stations exceeded 450,000,000 annually. As the volunteer National Chairman of the Board at Mothers Against Drunk Driving (MADD) he produced the first-ever public service music videos with Stevie Wonder “Don’t Drive Drunk” and Aretha Franklin “Think before you Drive and Drink.” He also produced a national TV special with famed film critics Siskel and Ebert viewing the evolution of drinking and driving as portrayed in the movies; “Hollywood Gets MADD” and helped MADD become one of the most recognized non-profits in America.
John C. (Jack) Lewin, M.D.
Chief Science, Policy and Innovation Officer
John C. (Jack) Lewin, M.D. is an internationally recognized expert in promoting healthy populations and a strong proponent for more efficient and effective healthcare systems to provide quality care for all. He is currently serving as Chief Science, Policy and Innovation Officer for Diabetes Treatment Centers International. He is the Chairman of the National Coalition on Health Care based in Washington, D.C., immediate past President of the international Cardiovascular Research Foundation (CRF) based in New York City and Chief Executive Officer of the American College of Cardiology (ACC.) Dr. Lewin is a distinguished leader in health care and regulatory policy who has advised two Presidents of the United States. Prior to his Presidency at ACC, Dr. Lewin was Chief Executive Officer of the 35,000 member California Medical Association for eight years. Previously, he was Hawaii’s Director of Health from 1986 to 1994, overseeing 6,500 employees, 12 hospitals, and a billion-dollar budget. In addition to helping Hawaii achieve near-universal access to health care and revitalizing statewide public health systems, he served as CEO of Hawaii’s 12-facility statewide public hospital system. Before that, as a Commissioned Officer in the United States Public Health Service, Dr. Lewin was the founder and first Director of the Navajo Nation Department of Health, serving the needs of America’s largest American Indian tribe. In 2011, he was named as one of Modern Healthcare’s “100 Most Influential People in Healthcare".