Jeffrey Mark, MD

As a retired nurse I've always known Dr. Mark to be an excellent GI doctor. So when I was having problems with my gut that's who I made an appointment with. His background in conventional and functional medicine was just what I needed. I am very pleased with the results and his follow-up care feeling much better 😊As we age our body doesn't always work the way that it once did and Dr. Mark is an expert in that field of medicine so I knew I was in good hands. Thank you, Dr. Mark

Dr. Mark was very knowledgeable and explained everything in great detail. Actually did his homework and was very informed about my situation. He was very helpful and gave me a plan of action that I could implement immediately. His plan made sense and relieved my anxiety regarding what to do next. I was happy to finally feel like I was going in the right direction. Thanks again, Cheryl

The Surgery Center is a top notch facility with friendly, professional staff and is clean and well organized. The nurses go the extra yard to make you comfortable, reassured and well prepared for your procedure. I remember nothing but the Anesthesiologist saying hello, and the nurse asking me if I was awake; my procedure was finished and I could go home.
I highly recommend Dr. Mark, an extremely accomplished physician, and his knowledgeable staff for any gastrointestinal issues you may encounter.
Sincerely,
Gloria Conlin

Dr. Mark was great! We did a video chat for our first meeting, and he took the time to really delve into what was needed and the best way to move forward! I was so happy with Dr. Mark!

Dr. Mark has been caring for me for more than 10 years and what I appreciate most about him is his ability to listen. Highly competent physician and generous with his time. Very compassionate and nonjudgmental.

Dr. Mark is a very good listener. I always feel each of my problems gets a full attention. I appreciate solutions provided, his knowledge and willingness to search for answers. Dr Mark’s office team also provides a great support.

Dr Mark is very interested in my continued good help and encourages me to keep doing what is necessary to stay healthy as an active Senior. He recommends behaviors and supplements which help me continue to be active. Thank-you very much.

Andrew received colonoscopy today, administration before procedure was efficient and thorough. Nurses and attendants were very friendly and made me feel comfortable, almost like I was a welcomed customer, once medicated the procedure felt like a long nap, felt good when I was awakened. Within an hour felt back to normal and went for a walk. Nurses signed a Thankyou card which made the hole experience even more nice. Only thing I would change is the music playing over the patient area, 80's hits, I would opt for a more relaxing, tranquil, soothing music. It wasn't an issue just thought it would better the experience.

Dr. Mark took his time to listen to my concerns. He addressed other underlying issues. This was my first appointment with him via video.
I am looking forward to continue working with him.

Just recently started seeing Dr. Mark he is taking care of my many GI issues very challenging blessed to be his patient I have Faith he will get me balanced

Doctor Jeffrey really took the time to go over every question we had. He gave us a plan for the next few steps and I feel confident he will determine what is going on with my son.

Dr. Mark saved my wife's life so
I know I'm in good hands. I'm sure Dr. Mark will see me through whatever has attacked my lower-abdomen.

One of the best surgical experience! Thanks Dr Mark to you, your staff and all the folks at Northern California Surgery Center! For taking good care of me 😊

First time visit with Dr.Marks. He actually took the time and listened too all my issues. Hopefully my health issues improve with his treatment.

I've been Dr Mark 15+ years and wouldn't change a thing. Very caring Dr

I have seen Dr Mark for several years and have been very satisfied

As a physician myself, I was impressed with the detailed history-taking pertinent to my upcoming procedure.

Dr. Marks takes great care of his patients!
Thank you Dr Marks!

I was very satisfied with the service i received. Everyone was on the ball and very professional.

Dr. Mark is a very professional, caring Medical Doctor.