We’re here for you.

A large part of the care provided by Interventional Endoscopy Services Medical Group (IESMG) is to help our patients arrange for care with our team of specialty physicians. Since our doctors are very specialized, often the first step is for the patient to obtain a referral from their physician. Our Administrative team is available to work with you to facilitate obtaining a referral should your insurance carrier requires one in order to be seen by us.  Whether or not a referral is necessary or provided, the next important step is to have your medical records pertaining to your particular diagnosis faxed to the Administrative Office.  The fax number is 415-375-4861.

Once your records are received, our IES physicians will carefully review them and determine what treatment is needed. Our Administrative team will then reach out to your insurance carrier to determine eligibility and if prior authorization for the procedure is needed. In other cases, if you are a self-pay or cash-pay patient an estimate of fees will be determined and payment will be required before your procedure. Once this is accomplished our office will work with you to make certain all details are addressed and will assist in setting a date and time for your procedure(s).

Important:  The records that we MUST receive in order for one of our physicians to review your case are:

  • History & Physical from Primary Care Physician
  • Progress note(s) from your referring physician (if not your primary care physician)
  • Prior endoscopy/colonoscopy/ERCP/capsule endoscopy (where applicable)
  • Radiology, pathology or other tests relevant to diagnosis
  • Lab work if done within the last 2 weeks
  • Insurance card and all forms completed

We understand you may have a lot of questions right now. We are here to help you find the answers. You can find us at:

The Paul May & Frank Stein Interventional Endoscopy Center Location: 
1101 Van Ness Avenue, Floor 4
San Francisco, CA 94109


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Choosing the best interventional endoscopy center for your complex digestive disease or condition

Choosing the right interventional endoscopy center is a critical step towards receiving the best possible outcome for your digestive condition. Whether you live outside California or in the San Francisco Bay Area, Marin County or Northern California, the best physician for you begins with choosing the interventional endoscopy program that offers comprehensive GI disease treatment options. 

Our physicians are some of the top interventional endoscopy doctors in the nation. They are world renowned pioneers in interventional endoscopy. We emphasize personalized patient care that is delivered through our physicians’ commitment to excellence and endoscopic expertise.

The Paul May and Frank Stein Interventional Endoscopy Center is located at California Pacific Medical Center, one of the largest private, not-for-profit, academic medical centers in California, and a Sutter Health affiliate. California Pacific is recognized as a tertiary referral center, providing access to advanced medicine and personal care.