Summary

Dr. Nicholas Triantafillou specializes in gastroenterology and internal medicine, bringing 38 years of clinical experience to his practice. He earned his medical degree from the University of Athens School of Health Sciences and completed his residency at Long Island College Hospital. His extensive background allows him to provide comprehensive digestive health care and internal medicine services. Dr. Triantafillou is fluent in Italian and Spanish, helping him connect with patients from diverse backgrounds.

Dr. Triantafillou practices at multiple locations throughout New York, including Bayside, Fresh Meadows, Manhasset, and Staten Island. He maintains affiliations with Staten Island University Hospital, Staten Island University Hospital South, and several Northwell Health facilities. His expertise includes treating common digestive conditions such as hemorrhoids, colon polyps, and gastritis. He performs essential diagnostic procedures including colonoscopy, upper GI endoscopy, and lower GI endoscopy to help patients maintain their digestive health. Patients rate his care at 3.7 out of 5 stars.
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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. Michael Seth Rosman, MDDr. Mikhail Yakubov, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.7 
38 Years of Experience 10 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
Bayside , NYNew York , NYNew York , NYNew York , NY
Med School: University Of Athens School Of Health Sciences Med School: State University of New York Med School: New York University School Of Medicine Med School: American University Of The Caribbean School Of Medicine
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

What languages does Dr. Nicholas Triantafillou speak?
Dr. Nicholas Triantafillou speaks Italian and Spanish.
Is Dr. Nicholas Triantafillou accepting new patients?
Dr. Nicholas Triantafillou is accepting new patients on Vitals. View Dr. Nicholas Triantafillou's profile on Vitals to make an appointment.
Where is Dr. Nicholas Triantafillou's office located?
Dr. Nicholas Triantafillou's office is located at 21305 39th Ave, Bayside, NY, 11361.
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.

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