Find an MSK Doctor or Cancer Specialist
Memorial Sloan Kettering radiation oncologist J. Isabelle Choi

J. Isabelle Choi, MD

Radiation Oncologist

Areas of Expertise

Conditions I Treat

  • Breast cancers and conditions

My Specialties

  • Proton therapy
  • External beam radiation
  • Image-guided radiation therapy (IGRT)
View all
Dr. Choi's Office Information
Languages: English
Request an Appointment
Our Care Advisors can answer many of your questions. They will connect you with the best healthcare provider for your needs.
Back to top
English
Share

Get to Know Me

I am a radiation oncologist who has special training in the treatment of breast cancer, including early-stage breast cancer, locally advanced breast cancer, and recurrent breast cancer.

I use highly conformal photon therapy techniques and pencil beam scanning proton therapy in my clinical practice. My experience in proton therapy allows me to identify patients who may benefit from this latest type of external beam radiation therapy. Proton therapy allows for more precise delivery of radiation therapy to the tumor and helps spare healthy tissue from exposure to radiation.

When caring for patients, my goal is to achieve the best possible results. I provide empathetic, holistic care and consider each person’s priorities while creating a treatment plan. I collaborate with different experts from the oncology care team to deliver a comprehensive, evidence-based care plan.

Read more

I was drawn to cancer care after a family member was diagnosed with cancer. Throughout my academic journey, I recognized the positive impact that I could have on a patient during one of the most challenging times in their lives. This motivated me to pursue a career in radiation oncology.

My research focuses on developing new approaches to reduce treatment-related side effects, improve the delivery and use of radiation therapy for people with breast cancer, and identify ideal salvage radiation therapy strategies for breast cancer that returns. 

I am the principal investigator of a national, multicenter, prospective randomized trial that studies the use of a shorter proton therapy regimen for treating people with breast cancer. I am also the principal investigator of an institutional, prospective clinical trial studying outcomes of the use of proton therapy for the delivery of repeat radiation therapy for people with recurrent or new primary cancers.

Among my multiple national and international leadership roles, I am the Chair or co-Chair of breast cancer committees leading efforts to improve radiotherapy delivery for breast cancer through education and research, including those for the American Radium Society (ARS), Proton Collaborative Group (PCG), Particle Therapy Co-Operative Group (PTCOG), and American College of Radiation Oncology (ACRO).  

What I Do at MSK

I'm a radiation oncologist, which is a cancer doctor with special training in using radiation therapy (RT) to treat cancer.

  • Associate Attending Radiation Oncologist
Areas of Expertise

Conditions I Treat

  • Breast cancers and conditions

My Specialties

  • Proton therapy
  • External beam radiation
  • Image-guided radiation therapy (IGRT)
  • Intensity-modulated radiation therapy (IMRT)
  • Cardiothoracic imaging
Education & Honors

Education

  • MD, University of Texas (Health Science Center at San Antonio)

Residencies

  • Radiation Oncology - Kaiser Permanente, Los Angeles Medical Center

Board Certifications

  • Radiation Oncology

Awards and Honors

  • 40 under 40 Electee, Crain’s New York Business (2023)

Insurance Information

Understanding your insurance options is an important part of managing your cancer care. We have relationships with many common healthcare providers and plans.

Aetna

In Network Coverage Type
HMO, EPO PPO, POS, Transplant

Aetna Medicare Advantage (MTA and NYC retirees only)

In Network Coverage Type
PPO

Anthem BCBS and other BCBS licensee plans

In Network Coverage Type
PPO, POS, EPO, HMO

See updates

Anthem BCBS Health Plus

In Network Coverage Type
HMO

See updates

Horizon Medicare Advantage

In Network Coverage Type
PPO, HMO

Healthfirst Medicare Advantage

In Network Coverage Type
HMO, PPO

Fidelis Medicare Advantage

In Network Coverage Type
HMO

Blue Cross Blue Shield Federal Employee Program

In Network Coverage Type
HMO, PPO

See updates

Blue Cross Blue Shield states outside of NY/NJ

In Network Coverage Type
HMO, EPO PPO, POS

See updates

Carrum Health

In Network Coverage Type
Supplemental

Cigna

In Network Coverage Type
PPO, POS, HMO

Connecticare

In Network Coverage Type
POS, EPO, HMO

Straight NJ Medicaid

In Network Coverage Type
State Government

Straight NY Medicaid

In Network Coverage Type
State Government

Emblem

In Network Coverage Type
PPO, POS, EPO, HMO

Offers a qualified health plan from the Health Insurance Marketplace. Call Emblem to learn more.

Emblem Essential

In Network Coverage Type
HMO

Emblem Medicare Advantage (Medicare Choice PPO Network and VIP Prime Network Only)

In Network Coverage Type
PPO, HMO

Empire Essential

In Network Coverage Type
HMO

Empire Plan / NYSHIP (Blue Cross/UnitedHealthcare split plan)

In Network Coverage Type
PPO

See updates

Fidelis

In Network Coverage Type
HMO, EPO

Offers a qualified health plan from the Health Insurance Marketplace. Call Fidelis to learn more.

Fidelis Managed Medicaid & HARP

In Network Coverage Type
HMO

First Health

In Network Coverage Type
PPO

Husky CT Medicaid

In Network Coverage Type
State Government

Healthfirst

In Network Coverage Type
EPO, HMO, PPO, POS

Offers a qualified health plan from the Health Insurance Marketplace. Call Healthfirst to learn more.

Healthfirst Managed Medicaid

In Network Coverage Type
HMO

Healthsmart

In Network Coverage Type
PPO EPO

Horizon Blue Cross Blue Shield New Jersey (HMO)

In Network Coverage Type
HMO

See updates

Horizon Blue Cross Blue Shield New Jersey (PPO)

In Network Coverage Type
PPO

See updates

Horizon Blue Cross Blue Shield New Jersey Omnia Tier I (EPO)

In Network Coverage Type
EPO

See updates

Horizon Blue Cross Blue Shield New Jersey Omnia Tier II (EPO)

In Network Coverage Type
EPO

See updates

NYC Medicare Advantage Plus for City Employees

In Network Coverage Type
TBD

Magnacare

In Network Coverage Type
PPO, POS, EPO

Medicare Part A&B (traditional Medicare)

In Network Coverage Type
Federal Government

Metroplus

In Network Coverage Type
HMO

City Employee Health Plans (Gold and Gold Care)

Multiplan/Beech Street/PHCS

In Network Coverage Type
Supplemental

MVP

In Network Coverage Type
PPO/OAP

Non-Participating Plans with Out of Network Benefits

In Network Coverage Type
PPO, POS, EPO, HMO

Oscar

In Network Coverage Type
HMO/EPO

Oxford

In Network Coverage Type
PPO, EPO

World Trade Center Health Program (WTC)

In Network Coverage Type
State Government

Qualcare

In Network Coverage Type
PPO, POS, HMO

Tricare

In Network Coverage Type
PPO, HMO

UMR

In Network Coverage Type
PPO, POS

United Healthcare

In Network Coverage Type
PPO, POS, HMO

Don't see your carrier or plan? We can help you understand your coverage.

If you don't have health insurance or are worried that your care may not be fully covered, our financial assistance programs may be able to help.

If you have questions about insurance, call us at 646-497-9176.

Make an Appointment

Women talking
New Patients
Scheduling an appointment is easy. Click or call 800-525-2225— we’re available 24 hours a day, 7 days a week
Make an Appointment
Current Patients
Request an appointment by calling your Care Team or messaging them in MSK MyChart.

Contact and Location

Dr. Choi sees patients at one location.

Office Phone
Location
New York, NY
Memorial Sloan Kettering Cancer Center
1275 York Avenue New York NY 10065
Get Directions

Looking to see a doctor at a different location? See all MSK locations.

Colleagues

Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

See all External Beam Radiotherapy Service, Manhattan doctors

See all Proton Therapy doctors

Clinical Trials

Smiling doctors in the lab
Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.

Search clinical trials

Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Choi’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.

See all on PubMed
Related topics: