Get To Know Our Our Healthcare Providers

Healthonomic Primary Care

Our group of doctors is made up of experienced and highly-trained physicians who subscribe to the Healthonomic mission statement of serving humanity through combating disease. We aim to provide education, support, guidance, and quality healthcare for those in need. Our clinics are made up of knowledgeable internists, women’s health specialists, family medicine doctors, and nurse practitioners.

Healthonomic Primary Care Dr. Maria

Dr. Maria Lentzou, MD

Internal Medicine

Healow ID Number

JJT - ERN - JJA7

Dr. Maria Lentzou serves the community of Orland Park, Illinois through Healthonomic Primary Care. With expertise in internal health, she provides diagnostics and treatment for adults in the area. 

Dr. Lentzou received her board certification in internal medicine in 2000 and has been practicing ever since. She graduated top of her class at the University of Athens and was top 10% during her residency at the University of Illinois at Chicago Medical School. Her faith is an important driving force for her work and dedication to medicine.  She speaks English, Greek, and Spanish and volunteers at her church every Saturday.

As part of her many active roles, she is the founder and president of her own multi-location medical group, which is affiliated with Advocate Physicians Partners, Advocate Christ Hospital, and Palos Health. Dr. Lentzou is an active member of her community in the southwest suburbs of Chicago.

Dr. Lentzou Receives Award

Dr. Lentzou receives a highly regarded award from Advocate Physician Partners. Advocate Physician Partners (APP) brings together more than 5,000 physicians who are committed to improving health care quality, safety and outcomes for patients across Chicagoland and central Illinois.  Dr. Lentzou and  Healthonomic Primary Care  is being recognized for exceptional integration outcomes which focuses on the needs of patients. 

Dr. Lentzou receives a highly regarded award from Advocate Physician Partners. Advocate Physician Partners (APP) brings together more than 5,000 physicians who are committed to improving health care quality, safety and outcomes for patients across Chicagoland and central Illinois.  Dr. Lentzou and  Healthonomic Primary Care  is being recognized for exceptional integration outcomes which focuses on the needs of patients.

Dr. Moira McQuillan, MD

Family Medicine

Healow ID Number

JTJ-IJT-RHJJ

Dr. Moira McQuillan is a graduate of the University of Illinois St Joseph Hospital Family Medicine Residency Program. Dr. McQuillan is a board-certified family physician through the American Board of Family Medicine. She is also a member of the American Academy of Family Physicians. She attended University of Illinois for her undergraduate studies. She then worked as an Intern Athletic Trainer at Northwestern University with their Football, Tennis and Men’s Soccer teams.  She then moved to Dublin, Ireland where she earned her Doctor of Medicine from the Royal College of Surgeons.

Dr. McQuillan is excited to continue to practice on the south side of Chicago. She treats patients of all ages, including children, adolescents, and adults. She has experience in diagnosing and treating complex and chronic disease processes and places a large emphasis on disease prevention in her day to day practice. She enjoys partnering with her patients to build long-standing relationships while helping them achieve their optimal health goals.

Dr. McQuillan currently resides in the Beverly Morgan Park area of Chicago with her husband and four children. In her free time, she enjoys running, gardening and photography. 

Ryan Kim, NP

Family Medicine

Healow ID Number

JHT - JIS - AANR

Ryan Kim is a board-certified nurse practitioner specializing in family practice. He completed his Bachelor of Science in Nursing at Governors State University, in University Park, Illinois. He then earned his Master of Science at Governors State University.

Ryan holds national board certification through the American Nurses Credentialing Center (ANCC) as a family nurse practitioner. As a nurse, he has worked in emergency medicine and medical-surgical departments. He works closely with the team at Healthonomic Primary Care to deliver a holistic approach to healthcare.

In his spare time, he enjoys volunteer work and giving back to various communities. He has taught Sunday school at his church for over ten years and has participated in two mission trips to Guatemala. He hopes to eventually be able to participate in medical missions and outreach to underserved communities.

Theresa Malinowski, FNP

Family Medicine

Theresa Malinowski is a board-certified Family Nurse Practitioner who places a strong emphasis on attentive patient care and a holistic approach to promoting overall wellness. With a Bachelor of Science in Nursing degree from the University of Illinois Chicago and a Master’s degree in Family Nursing Practice from Ball State University, Theresa graduated with the highest honors, summa cum laude, from both institutions. She holds dual certifications from reputable accrediting bodies, AANP and ANCC.

Over the course of the past 12 years, Theresa has dedicated her career to the field of nursing. Her extensive experience includes a significant tenure at the University of Chicago Hospital, specializing in acute care and focusing on patients with cardiac, thoracic, vascular, and transplant-related conditions. Additionally, she has worked with patient populations managing chronic and co-morbid disease processes. Theresa’s commitment to excellence is underscored by her progressive care certification, demonstrating her ability to care for some of the most critically ill patients.

Theresa is deeply passionate about disease prevention and primary care, firmly believing in a holistic approach to patient well-being. Her compassionate and empathetic nature fosters strong relationships built on trust with her patients, which she considers one of her highest priorities. Theresa is dedicated to collaborating with her patients to help them achieve their overall health objectives.

Outside of her professional life, Theresa resides in the southwest suburbs and is a mother of two school-age children. Her free time is spent keeping up with her active children and reflecting on her gymnastics background, where she was once a competitive gymnast and later coached competitive gymnastics during her undergraduate years. Theresa’s love for the sport remains an integral part of her identity. Beyond gymnastics, she enjoys cooking, gardening, spending quality time with friends and family, maintaining an active lifestyle, and attending church services on Sunday.

Contact One of Our Three Locations

Healthonomic Primary Care is dedicated to serving these Chicago-area communities. Our group of doctors are highly-specialized and dedicated to offering quality healthcare. We work to provide accurate diagnoses, treatments, holistic approaches, and wellness tips to improve health in an all-encompassing and complete way. Come by one of our offices or give us a call today.