Dr. Arnold Merin, MD

Dr. Arnold Merin, MD

Gastroenterology  |  
Male  |  
Age 67
Insurances AcceptedSave
Dr. Arnold Merin, MD is a gastroenterology doctor who practices in Tucson, AZ. He is 67 years old and has been practicing for 41 years.

1601 N Tucson Blvd Ste 14

Tucson, AZ 85716

Contact Information

(520) 795-4155

Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Cigna
  • First Health (Coventry Health Care)
  • MultiPlan

*Please verify this information when scheduling an appointment.

Learn about Dr. Merin

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you

Top Care Areas


See how frequently Dr. Merin performs your care needs compared to other doctors.

Diverticulitis, Intestinal
very high
more than 99% of peers
Irritable Bowel Syndrome
very high
more than 99% of peers
Abdominal Disorders
very high
more than 98% of peers

Dr. Merin's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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  • Gastroenterology

Board Certifications

  • Gastroenterology
    Accredited by: American Board of Internal Medicine*
  • Internal Medicine
    Accredited by: American Board of Internal Medicine*

Conditions Treated

  • Abdominal Disorders
  • Abdominal Pain
  • Abscess
  • Anal Prolapse
  • Anal or Rectal 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
  • Cholelithiasis
  • 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
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Diseases
  • Gastrointestinal Malabsorption
  • Gastroparesis
  • Heartburn
  • Hemochromatosis
  • Hemorrhoids
  • Hepatitis A
  • Hepatitis C
  • Hernia
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Abscess
  • Intestinal Ischemia
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Liver Damage from Alcohol
  • Malnutrition
  • Nausea
  • Neoplasm of Gastrointestinal Tract
  • Non-Alcoholic Fatty Liver Disease
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Peptic Ulcer
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Stomach Cancer
  • Stomach Diseases
  • Stomach and Small Intestine Cancer
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Viral Hepatitis
  • Vomiting Disorders


Read More


  • Bile Duct Procedure
  • Biliary Drainage
  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Gastroenterology Procedures
  • Liver Biopsy

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for Arizona.

0 Sanctions

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

0 Board Actions

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


  • University Of Maryland School Of Medicine
    Medical School | Graduated 1976
  • University MD Hosps
    Internship Hospital | Completed 1977
  • University MD Hosps
    Residency Hospital | Completed 1979
  • University Ariz
    Fellowship Hospital | Completed 1981

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Merin has no media or publications listed.

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 profile.

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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Now Accepting New Patients
Dr. Merin accepts 5 insurance carriers
  • Aetna
    Aetna HMO
    Choice Plus POS II
  • Blue Cross Blue Shield
    Blue Card PPO
  • Cigna
    Cigna HMO
    Cigna PPO
    Open Access Plus
  • First Health (Coventry Health Care)
    First Health (Coventry Health Care) PPO
  • MultiPlan
    MultiPlan PPO

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Merin has admitting privileges

Carondelet St. Mary's Hospital
1601 West St. Mary's Road
Tucson, AZ 85745
View Hospital Profile
Carondelet St. Joseph's Hospital
350 N Wilmot Rd
Tucson, AZ 85711
View Hospital Profile
Northwest Medical Center
6200 N La Cholla Blvd
Tucson, AZ 85741
View Hospital Profile

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