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Department Radiation Oncology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Both Adults and Children & Adolescents
Languages English
Surgeon Yes
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus


Additional Locations

Specialties & Treatments

Treatment & Services

  • Adult Neuro-Oncology
  • Body Radiosurgery
  • Brain Tumor Management
  • Cancer Center
  • External Beam Radiotherapy
  • Gamma Knife Radiosurgery
  • Image-Guided Radiation Therapy
  • Intensity Modulated Radiation Therapy
  • Novalis Radiosurgery/Radiotherapy
  • Pediatric Neuro-Oncology
  • Pediatric Radiotherapy
  • Radiation Oncology
  • Radiation Therapy
  • Spine Radiosurgery
  • Stereotactic Body Radiation Therapy (SBRT)
  • Stereotactic Radiosurgery
View all 16 Treatment & Services +

Specialty in Diseases & Conditions

  • Acoustic Neuroma
  • Adult Brain Tumors
  • Anaplastic Astrocytomas
  • Anaplastic Oligodendrogliomas
  • Astrocytoma
  • Benign Brain Tumors
  • Benign Tumors of the Spinal Cord
  • Brain Cancer
  • Brain Lymphoma
  • Brain Metastases
  • Cavernous Sinus Tumors
  • Central Nervous System (CNS) Malignancies
  • Chordomas
  • Clival Chordomas
  • Ependymomas
  • Glioblastoma Multiforme
  • Hemangioblastomas
  • Heterotopic Ossification
  • Malignant Gliomas
  • Malignant Tumors of the Spinal Cord
  • Meningioma
  • Ocular Lymphomas
  • Ocular Metastasis
  • Oligodendroglioma
  • Ophthalmic Tumors
  • Oral Cancer
  • Pediatric Brain Cancer
  • Pediatric Rare Cancer and Blood Disease Program
  • Pituitary Tumors
  • Primary Central Nervous System (CNS) Lymphomas
  • Retinal Hemangioma
  • Schwannoma
  • Skull Base Cancer
  • Spinal Cancer
  • Spinal Metastases
  • Spine Tumors
  • Trigeminal Neuralgia
  • Uveal Melanoma
View all 38 Specialties +


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About John Suh, MD

John Suh, MD, is the Chairman of the Department of Radiation Oncology and Associate Director of the Gamma Knife Center at the Brain Tumor and Neuro-Oncology Center at Cleveland Clinic.

Dr. Suh received his Bachelor's and Medical degrees from the University of Miami School of Medicine in Miami, Fla. He completed his internship, residency and fellowship at Cleveland Clinic from 1990 to 1995 and joined the Staff in 1995. He was the Residency Program Director from 1996 to 2002.

Dr. Suh is a written and oral Board Examiner for the American Board of Radiology. He serves as a reviewer for various medical journals and is a member of various medical societies.

His primary research interests are brain tumors, Gamma Knife radiosurgery and innovative radiation modalities. He has participated in numerous in-house, pharmaceutical and cooperative group trials.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Radiation Oncology
Cleveland, OH

Residency - Cleveland Clinic
Radiation Oncology
Cleveland, OH

Internship - Cleveland Clinic
Cleveland, OH

Medical Education - University of Miami School of Medicine
Miami, FL

Undergraduate - University of Miami
Coral Gables, FL

Professional Highlights

  • Chairman of the Department of Radiation Oncology
  • Associate Director of Cleveland Clinic's Gamma Knife Radiosurgery Center
  • Former Residency Program Director for Department of Radiation Oncology


  • Radiology - Radiation Oncology

Specialty Interests

Brain tumor, gamma knife

Awards & Honors

  •  America’s Top Doctors for Cancer 2009-2013 (Castle Connolly)

    National Brain Tumor Foundation Clinical Research Award, presented at Society of Neuro-Oncology meeting, 2003
  • ESTRO/ASTRO Traveling Fellowship Award, 1999


  • International Stereotactic Radiosurgery Society (ISRS)
  • American College of Radiology (ACR)
  • American Society of Therapeutic Radiology and Oncology (ASTRO)
  • Society of Chairmen of Academic Radiation Oncology Programs (SCAROP) 
  • Society of Neuro-Oncology (SNO)
Research & Publications

Research & Publications

See publications for John Suh, MD.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 4/14/2024, Dr. Suh has reported the financial relationships with the companies listed below. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Royalty Payments. Dr. Suh receives or has the right to receive royalty payments for inventions or discoveries commercialized through the companies shown below:

  • MedLever, Inc.

Right to Future Distribution of Cleveland Clinic Financial Interest. Dr. Suh may receive future financial benefits from the Cleveland Clinic for inventions or discoveries commercialized through the companies shown below:

  • MedLever, Inc.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

58 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
5 out of 5
Explains 4.9
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

12 Patient Comments

Reviewed on Jan 3, 2024

Dr. Suh is always pleasant and shows great concern and compassion for me when we meet.

Reviewed on Dec 27, 2023

Dr.Suh was very kind and gave very complete details of the upcoming procedure.

Reviewed on Nov 21, 2023

Dr Suh was very professional and helpful. He listened to my concerns and answer my questions. He assisted the technicians preparing for the radiation. They were SO attentive and not rushing me. They could not have been better!!!

Reviewed on Oct 24, 2023

Wonderful communication and very impressive Doctor!

Reviewed on Oct 24, 2023

Dr Suh & Dr Kshettry both did a fantastic job.

Reviewed on Oct 18, 2023

The doctor was very friendly and easy to talk with

Reviewed on Sep 26, 2023

Dr Suh is a wonderful physician.. He isn't only concerned about my meningioma he always checks on my wholeness in all areas.. He is going to refer me to a rheumatologist. He is a gentle and informative Physician I wish all my Docs could be like him

Reviewed on Sep 26, 2023

Dr Suh is the BEST!!!

Reviewed on Sep 14, 2023

Dr Suh is fantastic - knowledge wise and doctor-patient relationship wise

Reviewed on Sep 7, 2023

I respect Dr. John Suh, as a specialist because he respects me. He's empathetic and very smart, in regards to Radiology/ Oncology. He explains the summary reports of my MRI, with care to me and I look forward to seeing him at my now bi-annual check ups after having a brain tumor removed in 2021!

Reviewed on Sep 7, 2023

I have had no bad experiences with Dr. John Suh nor his nurses or staff. It's among the best visits to Doctor's appointments that I have been to at CLEVELAND CLINIC.

Reviewed on Jun 9, 2023

I'm very happy with Dr. SUH.

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