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Healthonomic Primary Care

Internists located in Orland Park, IL & Palos Heights, IL

Healthonomic Primary Care provides comprehensive healthcare for adults and adolescents in Orland Park and PalosHeights, Illinois. Founded by Dr. Maria Lentzou, the clinic serves as a primary care facility for disease prevention, chronic disease management, diagnostics, and treatment.

Together, Dr. Maria Lentzou and Dr. Vargas-Zapata bring a combined 45 years of medical expertise to their patients. As primary care providers, they can help you with routine physicals, labs, immunizations, weight loss, diabetes management, asthma treatment, and much more.

With a dedicated answering service and extended office hours, including Saturdays, the clinic ensures access to quality medical services. For additional access to testing and inpatient services, the practice is affiliated with Advocate Christ Hospital and Palos Health. Healthonomic Primary Care


Our Doctors


Dr. Maria Lentzou, MD

Internal Medicine

With her expertise in internal health, Dr. Maria Lentzou serves the community of Orland Park, Illinois, at Healthonomic Primary Care. Her clinic serves as a primary care facility, providing diagnostics and treatment for adults in the Chicago suburbs.

Dr. Lentzou graduated at the top of her class at the University of Athens and reached the top 10% during her residency at the University of Illinois at Chicago Medical School. She earned her board certification in internal care in 2000 and has been practicing for over 17 years.

As the founder and president of her multi-location medical group, Dr. Lentzou has established her health care services In Orland Park and Palos Heights. The medical group is affiliated with Advocate Physician Partners, Advocate Christ Hospital, and Palos Health.

Dr. Lentzou is an active member of her community in the southwest suburbs of Chicago. She speaks English, Polish, Greek, and Spanish. She volunteers at her church every Saturday, and her faith is the driving force behind her dedication to providing excellent healthcare to those she serves.

Dr. Lentzou Receives Award

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Dr. Rafael Vargas-Zapata, MD

Family Medicine

Dr. Rafael Vargas Zapata is originally from Costa Rica, grew up in California, and currently resides in River Forest, IL. He went to college at the Autonomous University of Neuvo Leon, form which he graduated in 1983, and continued on to complete residency training at St. Mary of Nazareth. Dr. Vargas-Zapata is 65 years old with 29 years of practice in Family Care. Interesting hobbies include reading and golfing in his spare time.


Ryan Kim, NP

Family Medicine

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 and then earned his Master of Science at Governors State University. He holds national board certification through the American Nurses Credentialing Center (ANCC) as a family nurse practitioner. As a nurse, he has worked in emergency health 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 having taught Sunday school at his church for over 10 years, and participating in two missions trips to Guatemala. He hopes to eventually be able to participate in medical missions and outreach to underserved communities.

Choose A Location

Orland Park Office

14400 S John Humphrey Drive, 1E,
Orland Park, IL 60462
Monday7:45am - 6pm
Tuesday7:45am - 6pm
Wednesday7:45am - 6pm
Thursday7:45am - 6pm
Friday7:45am - 5pm
Saturday8:00am - 3pm

Palos Heights Office

12050 South Harlem Ave, Suite A,
Palos Heights, IL 60463
Monday7:00am - 4pm
Tuesday7:00am - 4pm
Wednesday7:00am - 4pm
Thursday1:00pm - 7pm
Friday8:00am - 3pm
Saturday8:00am - 3pm