Summary

Dr. Andrew Marshall is a gastroenterologist with over three decades of experience treating digestive health conditions. He earned his medical degree from the Icahn School of Medicine at Mount Sinai and completed his residency at Beth Israel Medical Center. With 34 years in practice, Dr. Marshall brings extensive expertise to his specialty field. He provides care to patients in English.

Dr. Marshall practices at Northwell Health Hospital and sees patients in Hewlett, New York. He treats conditions such as high cholesterol in children and teens, hyperlipidemia, and hypertension. His practice includes performing diagnostic procedures like complete blood counts, alkaline phosphatase tests, and comprehensive metabolic panels. Patients have given him an average rating of 3.3 on Vitals.

AI-generated from data on this provider profile.

Quick Facts

  • 3.3
  • 34 years of experience
  • 30 insurance plans accepted
  • speaks English
  • Beth Israel Medical Center
  • 6 written reviews
  • 2 specialties
  • 11 areas of expertise
  • 1 board certification
  • 1 hospital affiliation
  • 1 office location
  • Male

Office Location

Dr. Andrew T Marshall

1800 Rockaway Ave Ste 201Hewlett, NY 11557
Mon7:00 am - 5:00 pm
Tue7:00 am - 5:00 pm
Wed7:00 am - 4:00 pm
Thu7:00 am - 5:00 pm
Fri7:00 am - 4:00 pm
Sat7:00 am - 1:00 pm
SunClosed

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Dr. Andrew T Marshall, MDDr. Maya Gambarin-Gelwan, MDDr. Brian R. Untch, MDDr. David Wan, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients
3.3 
3.2 
4.6 
4.3 
34 Years of Experience 28 Years of Experience 22 Years of Experience 21 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks Russian, English Speaks English Speaks English
Hewlett , NYNew York , NYMiddletown , NJNew York , NY
Med School: Icahn School Of Medicine At Mount Sinai Med School: Icahn School Of Medicine At Mount Sinai Med School: Stritch School of Medicine Med School: New York University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Andrew T Marshall

  • Accepts Medicare
  • Aetna
  • Affinity by Molina Healthcare
  • Anthem Blue Cross Blue Shield
  • CDPHP
  • Centivo
  • Cigna
  • ConnectiCare
  • Consumer Health Network
  • Coventry
  • EmblemHealth Insurance Company
  • EmblemHealth Plan Inc
  • Empire Blue Cross Blue Shield
  • Fidelis
  • First Health Network
  • Great West Healthcare
  • Health Insurance Plan of Greater Network
  • Healthfirst
  • Humana
  • MagnaCare
  • Medicare
  • Multiplan
  • MVP Health Care
  • Northwell Direct Network
  • Oscar
  • Oxford
  • Partners Health Plan
  • Private Healthcare Systems
  • The New York State Health Insurance Program
  • Tricare
  • United Healthcare

Medical Specialties

Dr. Andrew T Marshall has the following 2 specialties

Specialty Expertise

Dr. Andrew T Marshall has the following 11 areas of expertise

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

Certifications, License, & Education

34 Years Experience

MEDICAL LICENSE

Medical Doctor, New York, 2026, Active

EDUCATION & TRAINING

Residency

Beth Israel Medical Center

Medical School

Icahn School Of Medicine At Mount SinaiGraduated in 1992

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Frequently Asked Questions

Which hospitals is Dr. Andrew Marshall affiliated with?
Dr. Andrew Marshall is affiliated with Northwell Health Hospital.
Does Dr. Andrew Marshall accept my insurance?
You can see the insurance plans that Dr. Andrew Marshall accepts on their Vitals profile.
Where is Dr. Andrew Marshall's office located?
Dr. Andrew Marshall's office is located at 1800 Rockaway Ave Ste 201, Hewlett, NY, 11557.
How can I make an appointment with Dr. Andrew Marshall?
You can find contact information for Dr. Andrew Marshall here on Vitals.
What languages does Dr. Andrew Marshall speak?
Dr. Andrew Marshall speaks English.

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