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  • Gastroenterology, Internal Medicine
  • Accepting new patients
  • 40 years of experience
  • Harvard Vanguard Medical Associates Beverly 77 Herrick St Ste 101, Beverly, MA 01915
  • (978) 927-4110

Brief Intro

Dr. Demarkles graduated from the Tufts University School of Medicine in 1985. He works in Beverly, MA and 3 other locations and specializes in Gastroenterology and Internal Medicine. Dr. Demarkles is affiliated with Beverly Hospital.

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Education Background

RESIDENCY

Walter Reed National Military Medical Center

MEDICAL SCHOOL

Tufts University School Of Medicine - 1985

Languages Spoken

  • Spanish
  • English

Location & Hours

  • Atrius Health
  • 77 Herrick St Ste 101, Beverly, MA 01915
  • Mon:7:30 am - 5:30 pm
    Tue:7:30 am - 5:30 pm
    Wed:7:30 am - 5:30 pm
    Thu:7:30 am - 5:30 pm
    Fri:7:30 am - 5:30 pm
    Sat:Closed
    Sun:Closed

Specialties Treated

  • Gastroenterology
  • Internal Medicine

Conditions Addressed

  • Gastrointestinal Hemorrhage
  • Infectious Liver Disease
  • Diverticulitis
  • Constipation
  • Gastritis and Duodenitis
  • Gastroesophageal Reflux Disease (GERD)
  • Intestinal Obstruction
  • Peptic Ulcer Disease
  • Cirrhosis
  • Cholelethiasis or Cholecystitis
  • Inflammatory Bowel Disease (IBD)
  • Irritable Bowel Syndrome (IBS)
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Insurance Accepted

* Insurance information may change frequently. Please verify directly with the provider (doctor/clinic).

  • UnitedHealthcare Oxford
  • GEHA
  • Cigna
  • Trusted Health Plan
  • Tufts Health Plan
  • Medicare
  • Medicaid
  • CBA Blue
  • Anthem Blue Cross Blue Shield
  • Blue Cross Blue Shield
  • Health New England
  • Commonwealth Care Alliance
  • AARP
  • Aetna
  • UniCare
  • Health Plan of Nevada
  • Well Sense Health Plan
  • MassHealth
  • UnitedHealthcare
  • Mass General Brigham Health Plan
  • Harvard Pilgrim Health Care
  • Sierra Health and Life
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  • Cancer 19
  • Cardiology, Heart & Vascular Surgery 13
  • Orthopedics 35
  • Neurology & Neurosurgery 20
  • Gastroenterology & GI Surgery 32
  • Pulmonology & Lung Surgery 41
  • Diabetes & Endocrinology 25
  • Children's Hospital 8
  • Urology 35
  • Psychiatry 47
  • Geriatrics 33
  • Rehabilitation 11
  • Obsterics & Gynecology 6
  • Ophthalmology 2
  • Ear, Nose & Throat 6
  • Rheumatology 2
  • Long Term Care 7
  • Maternity Care (Uncomplicated Pregnancy) 15