Phoenix / Glendale / Scottsdale / Mesa / Chandler


Our gastroenterologists  offer consultation services for a wide range of common gastrointestinal disorders.


A colonoscopy may be recommended when symptoms of digestive disease or other warning signs are present.


Endoscopy lets us view the inside lining of your digestive tract for  gastrointestinal disease diagnosis and treatment.


Expert Medical Care From the Valley’s Leading Gastroenterologists.

Arizona Gastrointestinal Associates combines state-of-the-art technology with gentle care to provide patients with the best digestive health and endoscopy services possible. We understand that you need experienced gastroenterologists you can trust – people a lot like you. And that’s what our practice is about. We’re your neighbors. As the leading gastroenterologists in Arizona, we are dedicated to providing services in a patient-centered model where success is defined through patient satisfaction and outcomes of evidence-based medicine. We provide thorough communication and education to our patients, and we strive to make it as easy and convenient as possible for you.

Our team of experienced gastroenterology professionals looks forward to helping you maintain your best digestive health.


A gastroenterologist is a physician who has specialized training and experience in managing diseases of the gastrointestinal tract. The unique training and experience of a gastroenterologist allows them to provide high-quality, comprehensive care for patients with gastrointestinal conditions. Studies have shown that gastroenterologists perform higher-quality colonoscopies and provide more comprehensive care for gastrointestinal conditions than other physicians. This translates to more accurate detection of polyps and cancer, fewer complications from procedures, less time in the hospital for patients treated by gastrointestinal specialists and overall higher-quality of care for patients with gastrointestinal conditions.

When should you see a Gastroenterologist?

Colon Cancer Screening

Chronic gastrointestinal disorders such as:

  • Irritable bowel syndrome
  • Acid reflux
  • Inflammatory bowel disease
  • Diverticulitis
  • Hepatitis
  • Fatty liver disease
  • Cirrhosis
  • Celiac disease
  • Pancreatitis

Gastrointestinal symptoms such as:

  • Abdominal pain
  • Bloating
  • Blood in the stool
  • Constipation
  • Diarrhea
  • Difficulty swallowing
  • Excessive belching
  • Loss of appetite or weight
  • Persistent nausea and vomiting
  • Yellowing of the eyes or skin


Dr Kazi is FANTASTIC. He's kind, thorough, knowledgeable, and patient! He really takes the time to explain your condition and options. I've historically felt rushed in the majority of physicians offices-- not only did I not feel rushed or just like another no name patient on a schedule, but I felt true compassion. What a breath of fresh air!

Rhiannon S.

Mesa, AZ


Dr. Ramzan is the best gastroenterologist in Phoenix. I have Crohn’s disease, and he has been taking care of me for over 10 years.

Mark H.

Scottsdale, AZ
I met with Dr. Anthony Merrill for a first time consultation. This doctor actually took his time with me and listened to my concerns. He was very thorough and I know I will be on the right track to getting better with the help of this doctor!!!

Brittany T.

Glendale, AZ


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