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Internist, Radiologist, Oncology Specialist (cancer), Radiation Oncology
27 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. John Barrett:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. John Barrett is Excellent. Dr. Barrett has been reviewed by 2 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. John Barrett, MD is board certified in Internal Medicine and Radiation Oncology.

  • He has special expertise in 8 areas:
  • Breast Cancer
  • Cancer
  • Head and Neck Cancer
  • Lung Cancer
  • Lymphoma
  • Metastatic Breast Cancer
  • Nervous System Cancer
  • Radiation Oncology

Education & Awards

Dr. Barrett graduated from University of South Carolina , Columbia.


Dr. Barrett has 9 hospital affiliations:

  • Bartow Healthcare Systems,Ltd. d/b/a Bartow Memorial Hospital 
  • Lakeland Regional Medical Center 


  • Spanish

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Additional Information
Dr. John Thomas Barrett MD is a male Internist, has 27 years of experience and practices in Internal Medicine and Radiation Oncology.
Where does Dr. John T. Barrett practice?
Dr. John Barrett has 1 office location.
Dr. John Barrett practices Internal Medicine and Radiation Oncology near Lakeland, FL.
See Lakeland Internists and Lakeland Radiologists.