Nikhil T. Sebastian Emory Faculty
Nikhil T. Sebastian Emory Faculty

Nikhil T. Sebastian, MD

Radiation Oncology

4.9 - 765 Ratings

Winship Cancer Institute at Emory Saint Joseph's Hospita

5665 Peachtree Dunwoody Road, Erb Bldg, Ground Fl, Atlanta, GA 30342 +1 More Locations
Telehealth Visits Available

Booking information not available

(404) 778-1900

About

A board certified radiation oncologist, Nikhil T. Sebastian, MD, specializes in the treatment of prostate and other genitourinary cancers, and lung cancer. He is skilled in Gamma Knife radiosurgery and treats patients at Emory Saint Joseph's Hospital and Emory Proton Therapy Center.

Dr. Sebastian received his medical degree from The Ohio State University in Columbus, Ohio, where he also completed his residency in radiation oncology.

Dr. Sebastian's research interests include clinical trial development, integration of novel therapeutics, and identification of prognostic biomarkers.

Languages

  • English

Emory Affiliation

  • Emory Clinic - School of Medicine Faculty
  • Emory Physician Group Practice
  • Emory Healthcare Network
  • Winship Cancer Institute of Emory University

Academic Title

  • Assistant Professor

Year Started Practicing

  • 2020

Locations

Winship Cancer Institute at Emory Saint Joseph's Hospita

5665 Peachtree Dunwoody Road
Erb Bldg, Ground Fl
Atlanta, GA 30342

Winship Cancer Institute at Emory Saint Joseph's Hospita location map

Emory Proton Therapy Center

615 Peachtree Street Northeast
Atlanta, GA 30308

Emory Proton Therapy Center location map

Ratings & Reviews

4.9 out of 5 overall rating 765 ratings

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

4.9 Provider showed concern
4.9 Provider explained things clearly
4.9 Provider discussed treatment options
4.9 Provider included you in decisions
4.9 Likelihood of recommending this provider
5 out of 5 Reviewed on 2026-05-04

Doc Sebastian the best.

5 out of 5 Reviewed on 2026-04-25

Absolutely recommend. Doc Sebastian a communicative, informative stud! Great doc.

1 out of 5 Reviewed on 2026-04-22

You don't treat someone who has cancer like it's no big deal I don't care if it's stage one or a small dot very disappointed and got no where

5 out of 5 Reviewed on 2026-04-10

Dr. Sebastian is an excellent oncologist. His communication skills are outstanding.

3 out of 5 Reviewed on 2026-04-08

If I thought of a question concerning treatment I got a general answer. I don't know what I should be asking or concerned about so I have many uncertainties going forward. Four doctors so far in the process and no real confidence in the course of treatment beginning at this time.

5 out of 5 Reviewed on 2026-04-06

Dr Nakil Sebastian is the best.

5 out of 5 Reviewed on 2026-04-03

I received excellent treatment and there was a lot of identification with my case.

5 out of 5 Reviewed on 2026-04-01

Dr. Sebastian was extremely knowledgeable and confident. He gave us clear description on what to expect and was very informative. He is very passionate and caring. I feel very comfortable being treated by him.

5 out of 5 Reviewed on 2026-03-30

It is very reassuring to know that there is healthcare that truly makes a difference and makes sure you feel valued and supported,

5 out of 5 Reviewed on 2026-03-27

Dr Sabastian in the radiation department was my saving grace

5 out of 5 Reviewed on 2026-03-25

So far, Doc Sebastian simply excellent. Great communicator, all questions answered.

5 out of 5 Reviewed on 2026-03-21

My dictor provided me clear explanation of the treatment

5 out of 5 Reviewed on 2026-03-16

Dr Sebastian and the team are awesome

5 out of 5 Reviewed on 2026-03-12

Dr. Sebastian did an excellent job explaining the entire process and the side effects.

5 out of 5 Reviewed on 2026-03-06

Dr. Sebastian was very professional and took the time to explain the entire treatment for the prostate cancer.

5 out of 5 Reviewed on 2026-02-22

Great provider. Extremely helpful. Good advice and opinions.

5 out of 5 Reviewed on 2026-02-21

Dr Sebatsslian has been extremely helpful.

5 out of 5 Reviewed on 2026-02-21

Dr. Sebastian is a great communicator and shows empathy.

5 out of 5 Reviewed on 2026-02-07

Open to questions and patient

5 out of 5 Reviewed on 2026-01-31

Dr Sebastian has discussed all the available options with me, answered all my questions and suggested some optional services that I am grateful for.

5 out of 5 Reviewed on 2026-01-31

Dr. Sebastian is a true professional who cares for the wellbeing of his patients.

5 out of 5 Reviewed on 2026-01-31

Dr. Sebastian is an incredible asset to Emory and his Patients! Dr. Sebastian is very knowledgeable, professional and courteous. Everyone at the Emory Proton certain are very kind and attentive. I was comfortable and confident through my radiation treatment thanks to the trusted care of Dr. Sebastian and the Proton Center team

5 out of 5 Reviewed on 2026-01-30

Excellent visit with Dr. He is the best in hisField of medicine.

5 out of 5 Reviewed on 2026-01-28

Excellent care! Praying for an excellent outcome.

5 out of 5 Reviewed on 2026-01-22

Good

5 out of 5 Reviewed on 2026-01-12

We continue to use Emory Proton solely because of Dr Sebastian. He's both a ray of comforting sunshine and the consummate professional. I've never had a question he can't answer or a problem he can't solve. Emory would do well to allow him and his staff to thrive.

5 out of 5 Reviewed on 2026-01-11

Dr. Sebastian always is polite, professional and extremely knowledgeable. He listens carefully to my questions and gave detailed answers in a manner that I could understand. He showed genuine concern about my fatigue as my cancer treatments continue.

5 out of 5 Reviewed on 2025-12-25

Dr. Sebastian was excellent, in answering all my questions and communicating all details about my medical condition and treatment procedures.

5 out of 5 Reviewed on 2025-12-19

Good experience

5 out of 5 Reviewed on 2025-12-15

Very informative and answered any questions I had. Told me possible outcomes both good and bad

5 out of 5 Reviewed on 2025-12-10

She's Best

5 out of 5 Reviewed on 2025-11-15

Dr. Nikhil Sebastian is awesome gentleman.

5 out of 5 Reviewed on 2025-11-08

They were very nice also listen my concern. Very helpful always.

5 out of 5 Reviewed on 2025-11-08

Did great

5 out of 5 Reviewed on 2025-11-06

Great communicator and attention to providing options, medical details etc..

5 out of 5 Reviewed on 2025-11-05

Dr Sebastian explained treatment in clear terms that were easy to understand. Relatable. He, also, informed me of additional options I had been unaware of. Great visit. Left feeling comfortable.

5 out of 5 Reviewed on 2025-11-01

I would rate the service sire, but I rate it as high as I can

5 out of 5 Reviewed on 2025-10-29

Dr. Sebadtian at Winship was very professional who took his time to explain my cancer treatment and what to expect in side effects and was to treat them.

5 out of 5 Reviewed on 2025-10-25

Excellent team

5 out of 5 Reviewed on 2025-10-19

Dr. Sebastian is a fantastic listener and communicator, which makes me feel very lucky to have him as my doctor!

5 out of 5 Reviewed on 2025-10-18

Doc n nurse were very helpful

5 out of 5 Reviewed on 2025-10-18

Dr Sebastian is most through and professional but at the same time very personable and caring. One of the top medical professionals in my opinion.

5 out of 5 Reviewed on 2025-10-18

Great

5 out of 5 Reviewed on 2025-09-30

They were very professional

5 out of 5 Reviewed on 2025-09-28

Dr. Sebastian is a rock star. He is competent, caring, and very professional.

5 out of 5 Reviewed on 2025-09-27

Empathetic, knowledgeable, and trustworthy.

5 out of 5 Reviewed on 2025-09-27

Sebastian is a very caring person

5 out of 5 Reviewed on 2025-09-25

An amazing experience. Dr Sebastian showed empathy and compassion, and listened intently to me when I was talking.

5 out of 5 Reviewed on 2025-09-24

Dr. Sebastian is the best! The team that works with him is awesome!

5 out of 5 Reviewed on 2025-09-20

Very friendly and professional

5 out of 5 Reviewed on 2025-09-06

Dr. Sabastion and I had a great conversation getting into some details on studies regarding exercise and cancer.

5 out of 5 Reviewed on 2025-09-06

Good

5 out of 5 Reviewed on 2025-09-04

Dr Sebastian is a very gracious doctor. I have a great deal of respect for his advice.

5 out of 5 Reviewed on 2025-08-31

Doctor was very thorough and caring

5 out of 5 Reviewed on 2025-08-09

He is a good physician, even if he is an Ohio State Alumni.

5 out of 5 Reviewed on 2025-08-09

Doctor made sure that my wife and I were able to understand each facet of my opinions.

5 out of 5 Reviewed on 2025-07-29

All good

5 out of 5 Reviewed on 2025-07-27

He was caring and answered all questions so that my family and I could understand he is a great asset to your team

5 out of 5 Reviewed on 2025-07-20

Thorough. Handled all my questions.

5 out of 5 Reviewed on 2025-07-19

Good experience

5 out of 5 Reviewed on 2025-07-19

All good!

5 out of 5 Reviewed on 2025-07-19

Andrea, PA Cristina & Dr. Sebastian: All very Positive, Courteous, Professional, Knowledgeable and Respectful. My procedure became somewhat complicated and Cristina and Dr. Sebastian were calming, explained the situation and I couldn't ask for better care.

5 out of 5 Reviewed on 2025-06-30

Dr. Sebastian stayed late to meet with me, which was greatly appreciated!

5 out of 5 Reviewed on 2025-06-26

Dr. Sebastian, did a fantastic job of explaining my options for treatment and answering all my questions .

5 out of 5 Reviewed on 2025-06-21

Dr Sebastian has become one of my favorite physicians ever

5 out of 5 Reviewed on 2025-05-03

Excellent

5 out of 5 Reviewed on 2025-05-03

I highly recommend world class care I received at Emory.

5 out of 5 Reviewed on 2025-04-24

Very pleasant and concerned

5 out of 5 Reviewed on 2025-04-18

I appreciated his positive attitude.

5 out of 5 Reviewed on 2025-04-11

Exceptional positive experience.

5 out of 5 Reviewed on 2025-03-09

Dr. Sebastian is a professional

5 out of 5 Reviewed on 2025-03-08

Dr Sebastian shows care and concern for all of your questions and carefully explains issues and next steps in your care.

5 out of 5 Reviewed on 2025-02-21

Both doctors I met with, radiologist and urologist, were very responsive to my questions and concerns. They took time to explain my treatment options and discussed the pros/cons of each option. I truly appreciated their directness as related to my cituation.

5 out of 5 Reviewed on 2025-02-08

They discussed alternative ways for me to take my prescriptions to help my nausea better. So far it's helping! I would never have done this without their guidance. They are brilliant, they listen, they truly care! I'm in the absolute BEST hands!

5 out of 5 Reviewed on 2025-01-30

Very knowledgeable and explain theProcess which made us feel welcomed

5 out of 5 Reviewed on 2025-01-25

Dr. Sebastian is very patient, kind, and professional! I have complete confidence and trust in Dr. Sebastian.

5 out of 5 Reviewed on 2025-01-23

Very good experience

5 out of 5 Reviewed on 2025-01-19

Dr is excellent physician and specialist in his field and also very compassionate and excellent communicator!

5 out of 5 Reviewed on 2025-01-13

I would recommend Dr. Sebastian to anyone in similar circumstance as I am in as the premier doctor in his field.

5 out of 5 Reviewed on 2024-12-24

Dr. Sebastian is not only a brilliant and skilled physician he is extremely caring and listens; answers questions thiroughly

5 out of 5 Reviewed on 2024-12-11

Excellent physician!

5 out of 5 Reviewed on 2024-12-07

Dr Sebastian's thorough care is emblematic of Emory Proton's world class customer service

5 out of 5 Reviewed on 2024-12-06

Dr. Sebastian was excellent! He was knowledgeable and communicative about the purpose of our visit. He was attentive and truly demonstrated sincerity for our concerns and direction of care. He was friendly and very approachable. I would recommend him to anyone.

5 out of 5 Reviewed on 2024-11-21

Dr. Sebastian is stellar.I would've given him an even a higher rating than five

5 out of 5 Reviewed on 2024-11-19

I had talked to many doctors over the course the last few weeks about my issue. Dr. Sebastian was by far the most informative and I felt confident with him. I even had a couple of additional questions over the weekend which she got back to me very quickly on.

5 out of 5 Reviewed on 2024-11-09

Dr Sebastian and his staff re extremely professional, caring and concerning.

5 out of 5 Reviewed on 2024-11-07

Knowledgeable and concern about the patient understanding of the details.

5 out of 5 Reviewed on 2024-11-06

Dr Sebastian is an outstanding interviewer of prospective patients

5 out of 5 Reviewed on 2024-11-01

This is a great doctor who has a lot of knowledge and cares about his patients. I am so glad I have him for my doctor.

5 out of 5 Reviewed on 2024-10-20

Good

5 out of 5 Reviewed on 2024-10-20

In addition to answering every question, Dr. Sebastian also had recommendations which I had not even considered. Since receiving my cancer diagnosis in December of 2022, I feel Dr. Sebastian is by far the best practioner I have encountered.

5 out of 5 Reviewed on 2024-10-19

Dr Sebastian was very through with explanations regarding therapy. Clear and concise but always in a caring manner he presented risk/benefit of each step and the procedures. He paused after each procedural description to asm if I had questions the patiently answered each question. His calm and caring manner inspires confidence on the part of the patient.

5 out of 5 Reviewed on 2024-10-16

As always, care provider was very concerning and very, very professional.

5 out of 5 Reviewed on 2024-10-16

Everything is going , just as the doctor said

5 out of 5 Reviewed on 2024-10-03

Dr Sebastian is a kind and professional doctor. I enjoy my time with him, and feel great trust in his care

5 out of 5 Reviewed on 2024-09-07

Dr N Sebastian is always attentive and kind

5 out of 5 Reviewed on 2024-08-31

Dr. Sebastian is a true professional, skilled, and caring for his patients. Cannot ask for any better care.

5 out of 5 Reviewed on 2024-08-08

Dr Sebastian is awesome. Very helpful and informative. Excellent listener and provided great advice many times during my treatment. Dr Sebastian really represents what Winship Cancer Institute is all about.

5 out of 5 Reviewed on 2024-07-05

Good

5 out of 5 Reviewed on 2024-07-05

Dr Sebastian provided me with answers to all of my questions and thoroughly explained the treatment plan and all options for ongoing monitoring and treatment.

5 out of 5 Reviewed on 2024-07-04

Dr Sabastian was thorough, compassionate,professional &caring. Can't say enough good things about Dr

5 out of 5 Reviewed on 2024-06-28

Very good

5 out of 5 Reviewed on 2024-06-22

I was very impressed how well Dr. Sebastian and his assistant had Informed themselves about my case.

5 out of 5 Reviewed on 2024-06-17

It was apparent that Dr. Sebastian has read my entire medical record. This gave me a lot of confidence being his patient.

5 out of 5 Reviewed on 2024-06-17

Dr Sebastian answered all my questions and included me appropriately in treatment decisions.

5 out of 5 Reviewed on 2024-06-16

I feel SO fortunate to have Dr Sebastian as my physician at Emory Proton. From top to bottom, Emory Proton is a customer service beacon for other organizations to follow.

Credentials

Education

  • Residency: Ohio State University Medical Center, Radiation Oncology, 2020
  • Internship: Riverside Methodist Hospital, Transitional Year, 2016
  • Medical Education: The Ohio State University College of Medicine and Public Health, MD, 2015