Dr. Arnold Merin, MD


Gastroenterology | Male

Gastroenterology Associates 1601 N Tucson Blvd Ste 14 Tucson, AZ 85716 Get Directions
Dr. Arnold Merin, MD

Dr. Arnold Merin, MD is a gastroenterology doctor who practices in Tucson, AZ. He is 66 years old and has been practicing for 41 years. Dr. Merin is affiliated with Northwest Medical Center, Carondelet St. Mary's Hospital and Carondelet St. Joseph's Hospital.

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Dr. Merin's Experience

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Languages Spoken

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Memberships & Professional Affiliations

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Visiting Dr. Merin

Dr. Merin accepts 11 insurance carriers

Dr. Merin is now accepting new patients

Affiliated Hospitals

Hospital Quality
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Dr. Merin's Reviews

Likelihood of recommending Dr. Merin to family and friends
based on 20 total reviews (7 with comments)
Dr. Merin's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    10 to 15 minutes
Patient Comments (7)
Tucson, AZ |
Dr. Merin has been our doctor for many years. He also was our families doctor too. He has always been a caring and professional doctor with concerns about his patients, He never orders test that are not necessary. He has been the only one who HAS helped me through very terrible digestive issues. He spends time with us and really cares about his patients. negative comments are his front desk staff EXTREMELY rude.do not do reminder calls, so you miss appointment they will be rude as all heck!!!!!
in Tucson, AZ |
I find Dr Merin to be very professional and highly capable. He spent ample time discussing my complaints and he ordered comprehensive tests to determine the cause of my difficulty. I do not hesitate to give him my highest recommendation for both his capabilites and his "bedside" manner.
in Tucson, AZ |
Dr. Merin has been my GI Doc for about 15 years. He is presently ordering some tests that may well save my life. Everyone else just poo-pooed me. About 5 years ago, he took over someones practice, and now he limits his practice to Endoscopes and Colonoscopy. But, he has no problem referring to the best to get problems solved. He even found a nodule in my lung. No one else found it. GO DOC!
in Tucson, AZ |
Dr. Arnold tried to pull a fast one on a Retired, Disabled Nurse Not at all impressed by a Doctor who insists on procedures that are contraindicated for certain patients and told me not to believe the surgeon who saved my life and told me no more colonoscopies.This Physician is a typical GI Doc. They make all their money on Colonoscopies and EGD's. Left the office without any answer to my problem. He threw some pills at me. I tossed the prescription. Just another GI mill that runs th
in Tucson, AZ |
I have been seeing Dr. Merin for years. He is the only GI doctor that has ever taken the time to talk to me. Other GI's just keep setting up tests and I only got to speak to their assistants. Most of his staff are nice and Jean the scheduler is terrific. Be on time - He is never behind.
in Tucson, AZ |
DR. Merin dumped me as a patient for no reason.
in Tucson, AZ |
Dr. Merin has been my doctor for 3 years. I am very thankful to have him taking care of me! Dr. Merin is very kind and caring. He listens to me closely and then together we decide on what would be the best course of treatment. I am currently feeling the best I have felt in 10 years. Dr. Merin has personally called me with test results or because I simply left a message asking a question. His staff are friendly and efficient. I feel he is an outstanding doctor.
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Dr. Merin's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Gastroenterology
  •  Board certified in Gastroenterology and Internal Medicine
  •  Malpractice claims in Arizona not available
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Merin has no media or publications listed.

Background Check

  • n/a
    Malpractice Claims not available

    Healthgrades does not collect malpractice information for Arizona.

    What is medical malpractice
  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions

Board Certifications

Why It Matters: Dr. Merin's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Gastroenterology
  • Internal Medicine

Conditions Treated

  • Abdominal Disorders
  • Abdominal Pain
  • Anemia
  • Autoimmune Diseases
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Benign Tumor
  • Biliary Atresia
  • Blood Disorders
  • Cancer
  • Celiac Disease
  • Cholecystitis and Gallstones
  • Cirrhosis
  • Colorectal Cancer
  • Constipation
  • Copper Metabolism Disorders
  • Crohn's Disease
  • Dehydration
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Ulcer
  • Duodenitis
  • Dysphagia
  • Esophageal Achalasia and Cardiospasm
  • Esophageal Cancer
  • Esophageal Diseases
  • Esophageal Diverticulum
  • Esophageal Ulcer
  • Esophageal Varices
  • Esophagitis
  • Gallstones
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Diseases
  • Gastrointestinal Malabsorption
  • Gastroparesis
  • Heartburn
  • Hemochromatosis
  • Hemorrhoids
  • Hepatitis A
  • Hepatitis B - Immune Response
  • Hepatitis C
  • Hernia
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Liver Damage from Alcohol
  • Malnutrition
  • Nausea
  • Neoplasm of Gastrointestinal Tract
  • Non-Alcoholic Fatty Liver Disease
  • Non-Neonatal Jaundice
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Stomach Cancer
  • Stomach Diseases
  • Stomach and Small Intestine Cancer
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Vascular Insufficiency of Intestines
  • Viral Hepatitis
  • Vomiting Disorders


  • Medical School
    University Of Maryland School Of Medicine

    Graduated in 1976

  • Internship Hospital
    University MD Hosps

    Completed in 1977

  • Residency Hospital
    University MD Hosps

    Completed in 1979

  • Fellowship Hospital
    University Ariz

    Completed in 1981

Languages Spoken

  • English
  • Spanish

Memberships &
Professional Affiliations

Dr. Merin does not have any memberships or affiliations listed. If you are Dr. Merin and would like to add memberships or affiliations, please update your free profile.


  • Gastroenterology

Procedures Performed

  • Bile Duct Procedure
  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • ERCP (Endoscopic Retrograde Cholangiopancreatography)
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Gastroenterology Procedures
  • Liver Biopsy