4.4
5 Ratings
Summary
Dr. John Flack treats hypertension and hypertensive emergency and performs aldosterone blood tests, aldosterone urine tests, and general blood tests. He practices internal medicine and has 44 years of experience.
Board-certified in internal medicine by the American Board of Internal Medicine, Dr. Flack completed his medical training at the University of Oklahoma College of Medicine and residency at Oklahoma Memorial Hospital and Fairview-University Medical Center. He sees patients in Springfield, Illinois. Patients on Vitals rate Dr. Flack 4.4 out of 5.
Board-certified in internal medicine by the American Board of Internal Medicine, Dr. Flack completed his medical training at the University of Oklahoma College of Medicine and residency at Oklahoma Memorial Hospital and Fairview-University Medical Center. He sees patients in Springfield, Illinois. Patients on Vitals rate Dr. Flack 4.4 out of 5.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 44 years of experience
- 24 insurance plans accepted
- speaks English
- Okla Meml Hop
- 1 specialty
- 15 areas of expertise
- 1 board certification
- 2 office locations
- Male
Office Locations
John Flack has 2 locationsSIU Medicine General Internal Medicine Clinic
751 N Rutledge StSpringfield, IL 62702 Tel: (217) 545-8000
SIU Medicine Hypertension Clinic
747 N Rutledge St Room 4055Springfield, IL 62702 Tel: (217) 545-8000
Compare with Similar Doctors
 |  |  |  |
| John Flack, MD | Dr. Adewumi Bakare DMSc, PA-C | Dr. Firas Aubeid, MD, MBA, FACP | Dr. Kari Marguerite Wolf, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Psychiatry |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 44 Years of Experience | 19 Years of Experience | 29 Years of Experience | |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | No Virtual Visit Option |
| Speaks English | Speaks English, Spanish, Yoruba, French, Russian, Arabic, Chinese, Chinese (Mandarin) | Speaks English | Speaks English |
| Springfield , IL | Mesquite , TX | New Lenox , IL | Springfield , IL |
| Med School: University of Ok Coll of Med, Oklahoma City Ok | Med School: University of Lynchburg - DMSc | Med School: University Of Aleppo Faculty Of Medicine | Med School: University Of Iowa |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by John Flack
Medical Specialties
John Flack has the following specialty
Specialty Expertise
John Flack has the following 15 areas of expertise
Certifications, License, & Education
44 Years Experience
John Flack holds an expired medical license in the state of Illinois. They are board certified in Internal medicine by the American Board of Internal Medicine.
Board Certifications
Board certified in Internal medicine by the American Board of Internal Medicine.
Medical License
Medical Doctor with an expired medical license in the state of Illinois that expired in 2026.
Education & Training
Residency
Completed their residency at Okla Meml Hop, Okla Meml Hosp, and Fairview-Univ Med Ctr, Internal Medicine; Univ Ok Hlth Sci Ctr, Internal Medicine.
Medical School
Graduated from University of Ok Coll of Med, Oklahoma City Ok in 1982.
NPI Number
John Flack's NPI number is 1164450987.
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Frequently Asked Questions
- What languages does John Flack speak?
- John Flack speaks English.
- Does John Flack accept my insurance?
- You can see the insurance plans that John Flack accepts on their Vitals profile.
- How can I make an appointment with John Flack?
- You can find contact information for John Flack here on Vitals.
- Where is John Flack's office located?
- John Flack's office is located at 751 N Rutledge St, Springfield, IL, 62702.
- Is John Flack accepting new patients?
- John Flack is accepting new patients on Vitals. View John Flack's profile on Vitals to make an appointment.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Board certification bodies (such as ABMS)
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