Summary

Dr. John Flack is an internal medicine specialist who has dedicated over four decades to patient care. He earned his medical degree from the University of Oklahoma College of Medicine in Oklahoma City and completed his internal medicine residency training at Oklahoma Memorial Hospital and Fairview-University Medical Center. Dr. Flack is board certified in internal medicine by the American Board of Internal Medicine, bringing 44 years of clinical experience to his practice. He provides care to patients in English.

Dr. Flack practices at two locations in Springfield, Illinois, including the SIU Medicine General Internal Medicine Clinic and the SIU Medicine Hypertension Clinic. His clinical expertise focuses particularly on managing high blood pressure and hypertensive emergencies. He also provides specialized care for pediatric hypertension cases. Dr. Flack performs diagnostic blood tests including aldosterone testing to help evaluate hormone levels related to blood pressure regulation. Patients have rated him 4.4 out of 5 stars for his compassionate and thorough approach to care.
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Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.4
  • 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 locations

SIU Medicine Hypertension Clinic

747 N Rutledge St Room 4055Springfield, IL 62702

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John Flack, MDDr. Firas Aubeid, MD, MBA, FACPDr. Muhammad Anas AbdulrazzakDr. Raghed Abdel Hay Issa Abujabeh
Internal MedicineInternal MedicineInternal MedicineInternal Medicine
Accepts New Patients Accepts New Patients
4.4 
44 Years of Experience 19 Years of Experience
No Virtual Visit Option Virtual Visit Available No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English
Springfield , ILNEW LENOX , ILSpringfield , ILSpringfield , IL
Med School: University of Ok Coll of Med, Oklahoma City Ok Med School: University Of Aleppo Faculty Of Medicine
Current Profile
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Insurance Plans Accepted by John Flack

  • Aetna
  • Aetna Better Health - Medicaid (Managed)
  • Aetna Better Health - Medicare (Advantage HMO)
  • Anthem Blue Cross
  • Blue Cross Blue Shield of Illinois
  • Blue Cross Blue Shield of Illinois - HMO
  • Health Alliance
  • Healthlink
  • Humana
  • Kaiser Permanente - Medicaid (Managed)
  • McLaren Health Plan
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Meridian Health Plan
  • Molina Healthcare
  • Molina Healthcare - HMO
  • Molina Healthcare - Medicaid
  • Molina Healthcare - Medicaid (Managed)
  • Priority Health
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - PPO
  • Wellcare

Medical Specialties

John Flack has the following specialty

Specialty Expertise

John Flack has the following 15 areas of expertise

  • Arteriosclerosis (Arterial Disease)
  • Cardiovascular Disease
  • Check-up
  • Coronary Disease
  • Diabetes
  • Diabetes, Type 2
  • Heartburn
  • High Blood Pressure (Hypertension)
  • Immunization
  • Metabolic Syndrome X
  • Myocardial Infarction
  • Obesity
  • Physical
  • Vaccination
  • Weight Loss

Certifications, License, & Education

44 Years Experience

John Flack holds an active 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 active medical license in the state of Illinois that expires 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

Where is John Flack's office located?
John Flack's office is located at 751 N Rutledge St, Springfield, IL, 62702.
Does John Flack accept virtual/telehealth appointments?
John Flack has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
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.

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