Summary

Dr. Nicholas Triantafillou treats hemorrhoids, colon polyps, and gastritis, and performs lower GI endoscopy, colonoscopy, and upper GI endoscopy. He practices gastroenterology and internal medicine and has 38 years of experience.

Dr. Triantafillou completed his residency at Long Island College Hospital and sees patients in Bayside, Fresh Meadows, Manhasset, and Staten Island, New York. He is affiliated with Staten Island University Hospital, Staten Island University Hospital South, Northwell Health Hospital, and Katz Womens Hospital at North Shore University Hospital. He speaks Italian and Spanish. Patients on Vitals rate Dr. Triantafillou 3.74 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 3.7
  • 38 years of experience
  • speaks Italian, Spanish
  • Long Island College Hospital
  • 9 written reviews
  • 2 specialties
  • 11 areas of expertise
  • 4 hospital affiliations
  • 7 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Nicholas G Triantafillou has 7 locations

Triantafillou Nicholas G Office

21305 39th AveBayside, NY 11361
Mon11:00 am - 8:00 pm
Tue11:00 am - 4:00 pm
Wed11:00 am - 2:00 pm
Thu10:00 am - 4:00 pm
Fri11:00 am - 3:00 pm
SatClosed
SunClosed

Queens Endoscopy ASC

17660 Union Tpke Ste 101Fresh Meadows, NY 11366

Northwell Health

475 Seaview AveStaten Island, NY 10305

Queens Endoscopy Asc Llc

17660 Union Tpke Frnt 1Fresh Meadows, NY 11366
Mon6:00 am - 5:00 pm
Tue6:00 am - 5:00 pm
Wed6:00 am - 5:00 pm
Thu6:00 am - 5:00 pm
Fri6:00 am - 5:00 pm
SatClosed
SunClosed

Northwell Health Hospital

300 Community DrManhasset, NY 11030

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Dr. Nicholas G Triantafillou, MDDr. Connie Park, MDDr. Mikhail Yakubov, MDDr. Michael Dann, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.7 
5 
5 
5 
38 Years of Experience 9 Years of Experience 14 Years of Experience 22 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks Italian, Spanish Speaks English Speaks English, Russian, Hebrew Speaks English
Bayside , NYNew York , NYNew York , NYNew York , NY
Med School: University Of Athens School Of Health Sciences Med School: SUNY Downstate Health Sciences University College of Medicine (State University of New York) Med School: American University Of The Caribbean School Of Medicine Med School: State University of New York
Current Profile
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Insurance Plans Accepted by Dr. Nicholas G Triantafillou

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. Nicholas G Triantafillou has the following 2 specialties

Specialty Expertise

Dr. Nicholas G Triantafillou has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

38 Years Experience

Dr. Nicholas G Triantafillou holds an expired medical license in the state of New York.

Medical License

Medical Doctor with an expired medical license in the state of New York that expired in 2026.

Education & Training

Residency

Completed their residency at Long Island College Hospital.

Medical School

Graduated from University Of Athens School Of Health Sciences in 1988.

NPI Number

Dr. Triantafillou's NPI number is 1144212853.

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Frequently Asked Questions

Where is Dr. Nicholas Triantafillou's office located?
Dr. Nicholas Triantafillou's office is located at 21305 39th Ave, Bayside, NY, 11361.
How can I make an appointment with Dr. Nicholas Triantafillou?
You can find contact information for Dr. Nicholas Triantafillou here on Vitals.
Which hospitals is Dr. Nicholas Triantafillou affiliated with?
Dr. Nicholas Triantafillou is affiliated with Staten Island University Hospital, Staten Island University Hospital South, NORTHWELL HEALTH HOSPITAL, and KATZ WOMENS HOSPITAL AT NORTH SHORE UNIVERSITY HOSPITAL.
Does Dr. Nicholas Triantafillou accept my insurance?
You can see the insurance plans that Dr. Nicholas Triantafillou accepts on their Vitals profile.
What languages does Dr. Nicholas Triantafillou speak?
Dr. Nicholas Triantafillou speaks Italian and Spanish.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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