Expertise in
10
conditions

Dr. Norman S. Nishioka

Gastroenterology
Massachusetts General Hospital
55 Fruit St, 
Boston, MA 
Accepting New Patients
Offers Telehealth
Expertise in
10
conditions
Massachusetts General Hospital
55 Fruit St, 
Boston, MA 

Overview

Norman Nishioka is a Gastroenterologist practicing medicine in Boston, Massachusetts.

Dr. Nishioka is highly rated in 10 conditions, according to our data. His clinical expertise encompasses Barrett Esophagus, Turcot Syndrome, Gardner Syndrome, Endoscopy, and Colonoscopy.

He is actively involved in clinical research, co-authoring 29 peer reviewed articles. Dr. Nishioka is currently accepting new patients.

Specialties

Gastroenterology

Licenses

Internal Medicine in MA

Hospital Affiliations

Massachusetts General Hospital
Brigham And Women's Hospital

Languages Spoken

English

Gender

Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

Find your insurance
Find your insuranceClose

Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem BCBS
  • EPO
  • HMO
  • POS
  • PPO
Blue Cross Blue Shield
  • EPO
  • HMO
  • POS
  • PPO
Blue Shield of California
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE-MEDICAID PLAN
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
CareFirst
  • HMO
  • POS
  • PPO
Cigna
  • EPO
  • HMO
  • PPO
Commonwealth Care Alliance
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
Health Care Services Corporation
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Highmark
  • EPO
  • HMO
  • PPO
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Managed Medicaid
  • OTHER MANAGED MEDICAID
Mass General Brigham Health Plan
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • PPO
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
Tufts
  • HMO
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 11 Less Insurance Carriers -

Locations

Massachusetts General Hospital
55 Fruit St, Boston, MA 02114

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.

29 Total Publications

Effect of icosapent ethyl treatment on colorectal tissue marine ω-3 polyunsaturated fatty acid levels among patients with a history of adenoma: a prospective, single-arm clinical trial.
Effect of icosapent ethyl treatment on colorectal tissue marine ω-3 polyunsaturated fatty acid levels among patients with a history of adenoma: a prospective, single-arm clinical trial.
Journal: The American journal of clinical nutrition
Published: December 02, 2025
Similar Doctors
Expertise in
18
conditions
Dr. Gilaad G. Kaplan
Gastroenterology
Expertise in
18
conditions
Dr. Gilaad G. Kaplan
Gastroenterology
Referral may be required

Massachusetts General Hospital

55 Fruit St, 
Boston, MA 
 (0.1 miles away)
617-726-3673
Languages Spoken:
English

Gilaad Kaplan is a Gastroenterologist practicing medicine in Boston, Massachusetts. Dr. Kaplan is highly rated in 18 conditions, according to our data. His clinical expertise encompasses Viral Gastroenteritis, Crohn's Disease, Colitis, Endoscopy, and Colonoscopy.

Expertise in
16
conditions
Dr. Hamed Khalili
Gastroenterology
Expertise in
16
conditions
Dr. Hamed Khalili
Gastroenterology
Referral may be required

Office

165 Cambridge St Fl 9, 
Boston, MA 
 (0.1 miles away)
617-726-7933
Languages Spoken:
English
See accepted insurances
Accepting New Patients
Offers Telehealth

Hamed Khalili is a Gastroenterologist practicing medicine in Boston, Massachusetts. Dr. Khalili is highly rated in 16 conditions, according to our data. His clinical expertise encompasses Ulcerative Colitis, Lymphocytic Colitis, Crohn's Disease, Colonoscopy, and Endoscopy. Dr. Khalili is currently accepting new patients.

Expertise in
27
conditions
Dr. Andrew T. Chan
Gastroenterology
Expertise in
27
conditions
Dr. Andrew T. Chan
Gastroenterology
Referral may be required

Office

243 Charles St Ste 1107, 
Boston, MA 
 (0.1 miles away)
617-273-5699
Languages Spoken:
English
See accepted insurances
Accepting New Patients
Offers Telehealth

Andrew Chan is a Gastroenterologist practicing medicine in Boston, Massachusetts. Dr. Chan is highly rated in 27 conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Diverticular Disease, Familial Colorectal Cancer, Colonoscopy, and Endoscopy. Dr. Chan is currently accepting new patients.

Frequently Asked Questions about Dr. Norman S. Nishioka

How do I make an appointment with Dr. Norman S. Nishioka?

You can book an appointment with Dr. Norman S. Nishioka by calling their office at 617-726-4422. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.

Is Dr. Norman S. Nishioka a top-rated expert for Barrett Esophagus?

MediFind is an objective health platform that identifies experts based on real-world data. Dr. Norman S. Nishioka is classified as an Elite expert for Barrett Esophagus, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.

What conditions does Dr. Norman S. Nishioka specialize in?

While Dr. Norman S. Nishioka is a Gastroenterology, they have specific expertise in Barrett Esophagus, Turcot Syndrome, and Gardner Syndrome. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Gastroenterology.

Does Dr. Norman S. Nishioka participate in research or clinical trials?

Yes. Dr. Norman S. Nishioka has published 29 articles and abstracts on conditions like Barrett Esophagus. You can view a list of Dr. Norman S. Nishioka's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.

Does Dr. Norman S. Nishioka accept my insurance?

Dr. Norman S. Nishioka accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 617-726-4422 to verify that your specific plan is currently accepted before your visit.

Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

Find Dr. Nishioka's expertise for a condition
ConditionClose
View All 30 Experienced Conditions
Want to save this doctor for later?
Sign Up
Is this your doctor?
Find A Second Opinion
Not sure about your diagnosis?
Check Your Symptoms
 
 
 
 
Learn about our expert tiers
Learn More
Are you the provider on this profile?
Claim Profile