4.4
8 Ratings with 3 written Reviews
Summary
Dr. David Onsager is a thoracic surgeon who specializes in advanced heart and chest procedures. He earned his medical degree from Rush Medical College of Rush University Medical Center and brings 38 years of surgical experience to his practice. His extensive background in thoracic surgery allows him to treat complex cardiovascular conditions with precision and expertise. Dr. Onsager is fluent in English.
Dr. Onsager practices at multiple locations within The University of Chicago Medicine system, including The Methodist Hospitals Northlake and Southlake campuses, UChicago Medicine Comer Children's Hospital Hyde Park, and The Center for Care and Discovery in Chicago, Illinois. He focuses on treating heart failure and coronary artery disease, including specialized care for women with heart conditions. His surgical expertise includes performing transcatheter aortic valve implantation and coronary artery bypass procedures using minimally-invasive techniques. Patients rate Dr. Onsager 4.4 …out of 5 stars on average.
Read More Read less Dr. Onsager practices at multiple locations within The University of Chicago Medicine system, including The Methodist Hospitals Northlake and Southlake campuses, UChicago Medicine Comer Children's Hospital Hyde Park, and The Center for Care and Discovery in Chicago, Illinois. He focuses on treating heart failure and coronary artery disease, including specialized care for women with heart conditions. His surgical expertise includes performing transcatheter aortic valve implantation and coronary artery bypass procedures using minimally-invasive techniques. Patients rate Dr. Onsager 4.4 …out of 5 stars on average.
Overview based on verified provider data
Quick Facts
- 38 years of experience
- speaks English
- Rush Medical College Of Rush University Medical Center
- 3 written reviews
- 3 specialties
- 8 areas of expertise
- 3 board certifications
- 5 hospital affiliations
- 2 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. David Ralph Onsager has 2 locationsThe University Of Chicago Medical Center Duchossois Center For Advanced Medicine
5758 S Maryland AveChicago, IL 60637Mon7:30 am - 6:00 pm
Tue7:30 am - 6:00 pm
Wed7:30 am - 6:00 pm
Thu7:30 am - 6:00 pm
Fri7:30 am - 6:00 pm
Sat7:30 am - 6:00 pm
SunClosed
Compare with Similar Doctors
 |  |  | |
| Dr. David Ralph Onsager, MD | Dr. Di Fan, MD | Ian Thomas Nolan | Adam Khayat |
| Thoracic Surgery | Thoracic Surgery | Plastic Surgery | Vascular & Interventional Radiology |
| Accepts New Patients | |||
| 38 Years of Experience | 43 Years of Experience | 5 Years of Experience | 4 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English | Speaks Russian, Spanish | ||
| Chicago , IL | Chicago , IL | Chicago , IL | Chicago , IL |
| Med School: Rush Medical College Of Rush University Medical Center | Med School: China Medical University | Med School: New York University School Of Medicine | Med School: New York University Long Island School Of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. David Ralph Onsager
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. David Ralph Onsager has the following 3 specialties
Specialty Expertise
Dr. David Ralph Onsager has the following 8 areas of expertise
Certifications, License, & Education
38 Years Experience
Dr. David Ralph Onsager holds an expired medical license in the state of Illinois.
Medical License
Medical Doctor with an expired medical license in the state of Illinois that expired in 2026.
Education & Training
Medical School
Graduated from Rush Medical College Of Rush University Medical Center in 1988.
NPI Number
Dr. Onsager's NPI number is 1396829156.
Similar doctors
Frequently Asked Questions
- What languages does Dr. David Onsager speak?
- Dr. David Onsager speaks English.
- Does Dr. David Onsager accept my insurance?
- You can see the insurance plans that Dr. David Onsager accepts on their Vitals profile.
- Which hospitals is Dr. David Onsager affiliated with?
- Dr. David Onsager is affiliated with The University Of Chicago Medicine, The Methodist Hospitals Northlake Campus, Methodist Hospitals Southlake Campus, Uchicago Medicine Comer Childrens Hospital Hyde Park, and The Center For Care And Discovery.
- Does Dr. David Onsager accept virtual/telehealth appointments?
- Dr. David Onsager has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Is Dr. David Onsager accepting new patients?
- Dr. David Onsager has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews
Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.
