4.4
8 Ratings with 3 written Reviews
Summary
Dr. David Onsager treats heart failure, coronary artery disease, and coronary artery disease in women, and performs transcatheter aortic valve implantation, coronary artery bypass graft, and minimally invasive heart surgery. He has practiced thoracic surgery and surgery for 38 years.
Dr. Onsager earned his medical degree from Rush Medical College of Rush University Medical Center and is affiliated with The University of Chicago Medicine, The Methodist Hospitals Northlake Campus, Methodist Hospitals Southlake Campus, UChicago Medicine Comer Children's Hospital Hyde Park, and The Center for Care and Discovery. He sees patients in Chicago, Illinois. Patients on Vitals rate Dr. Onsager 4.38 out of 5.
Dr. Onsager earned his medical degree from Rush Medical College of Rush University Medical Center and is affiliated with The University of Chicago Medicine, The Methodist Hospitals Northlake Campus, Methodist Hospitals Southlake Campus, UChicago Medicine Comer Children's Hospital Hyde Park, and The Center for Care and Discovery. He sees patients in Chicago, Illinois. Patients on Vitals rate Dr. Onsager 4.38 out of 5.
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
- 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 | Roman Symeon Solecki | Won He Lee |
| Thoracic Surgery | Thoracic Surgery | Anesthesiology | Psychiatry |
| Accepts New Patients | Accepts New Patients | ||
| 38 Years of Experience | 3 Years of Experience | 6 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: Loyola University Of Chicago Stritch School Of Medicine | Med School: University Of Texas Medical Branch At Galveston |
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.
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Frequently Asked Questions
- 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.
- Where is Dr. David Onsager's office located?
- Dr. David Onsager's office is located at 5758 S Maryland Ave, Chicago, IL, 60637.
- 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.
- Does Dr. David Onsager accept my insurance?
- You can see the insurance plans that Dr. David Onsager accepts on their Vitals profile.
- How can I make an appointment with Dr. David Onsager?
- You can find contact information for Dr. David Onsager here on Vitals.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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