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Upon his recent retirement, Gastroenterologist Dr. Henry Kung nominated Dr. Zheng's office as the official custodian of medical records of all his patients.  Dr. Kung also transferred his office phone to Dr. Zheng for the convenience of his patients.  You can reach us at 925 384 9276 and 925 945-6070, or you can email us at:

Fishing Boat

Transfer of Care

Dr. Zheng is accepting transfer of care from all patients of Dr. Kung. 


Priority will be patients due for colonoscopy /colon cancer screening, upper endoscopy for Barrett's esophagus, patients who are currently ill, and patients with chronic GI issues needing ongoing care.


We do encourage all patients to contact us to schedule a meet and greet appointment with Dr. Zheng, even if you are not currently due for procedure.  This will help us establish a great patient doctor relationship before potential urgent needs arise. 


It's anticipated that there may be an increase of demand next 1-2 years from postponing cancer screening during COVID pandemic.  An introductory appointment will help you secure an appointment ahead of time before your procedure is due.

We have openings for weekend and night clinics to accommodate everyone.

Nurse with Protective Mask


Dr. Zheng is in the process of delivering welcome letters and/or calls to patients of Dr. Kung. 


Like Dr. Kung, Dr. Zheng is sending you remind letters and emails when you are due for colonoscopy /colon cancer screening, upper endoscopy for Barrett's esophagus, screening of high risk patients for stomach cancer, etc.  We will also try to have office staff call to follow up and make sure reminds were received during transition of care.


If you think you are due for follow up but have not received letter from us, please make an appointment with us.  You can call us at office phone 925 384 9276 and 925 945-6070, or schedule an appointment with Dr. Zheng online.

Dr. Zheng is committed to your health - She is on call for you 24/7, 365 days a year.

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Hands on Computer Keyboard
Woman on Phone

Your Medication Refills

Dr. Zheng will refill your medications for one time so that you have time to schedule an appointment for transfer of care.


For non critical medications, such as acid reflux or constipation medications, the best way to refill your medication is to email us at:

Please include your name, date of birth, address, name and dosage of medication, pharmacy and insurance information.

If you are taking medications for more serious medical conditions, such as IBD (ulcerative colitis, Crohn's disease, microscopic colitis, hepatitis, cirrhosis, liver transplant, etc).  Dr. Zheng can provide one urgent refill.   It's best to schedule an appointment with us first so Dr. Zheng can monitor you.

You can reach us at 925 384 9276 and 925 945-6070.

Prescription Drugs

Your Medical Records

If a record is needed for a medical emergency, Please provide us with the info of the MD that your are getting care from, Dr. Zheng will communicate with your doctor directly.


As official custodian of medical records of Dr. Kung's patients, we not only look after your health care information, but also provide timely remind letters/calls when patients are due for colonoscopy, endoscopy Barrett's esophagus screening and stomach cancer screening for increased risk patients etc.  You don't need to contact us just to check your due date.

Please also be reassured that your Primary Care Doctor and other specialists always have access to your medical records so you don't need to contact us on behalf of them.


If you need a copy of your medical records for reasons that's not stated above, please email us at Please include your name, date of birth and email address.  Please kindly allow 8 weeks for non medically urgent requests.


In additional to safeguard your medical record, Dr. Zheng's office is also in the process of transferring essential part of Dr. Kung's paper charts to electronic medical record.

Priority will be patients who have transferred care to Dr. Zheng and who will be seeing Dr. Zheng soon, as well as patients due for colonoscopy /colon cancer screening, upper endoscopy for Barrett's esophagus and/or stomach cancer screening etc.

Even after transition of electronic medical record, all paper medical charts will be kept according to medical legal requirements.  


Any additional questions, please feel free to contact us at 925 384 9276 and 925 945-6070.

Record Store

Help us stay Green

We only have one planet, Earth, and most of us have realized that it is important to do our part in order to protect it.


 Use paperless communication. This is not only extremely convenient, but it also saves trees. Our office offers default paperless option: 1) Electronic signing of documents 2) copay and bills can either be paid online or automatically deducted from credit card 3) documents such as procedure instructions, medical records, will be emailed to you 4) communicate with doctor via online portal 5) email reminder for cancer screening  6) text or email remind/confirmation for appointments, and much more

To get started, please send your email address to


Dr. Kung was well known in the community for providing excellent patient care, his dedication to building close relationships with his pateints and his thoughtful approach towards medicine.

Dr. Zheng will continue the same.  We hope you will place the same faith and confidence in our practice and We look forward to serving your future healthcare needs.


If you need to reach Dr. Kung for other reasons, his forwarding address is
P.O. Box 1051
Alamo, CA 94507

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