
Overview
Dr. B. Mark Zhao is a colorectal surgeon who cares for patients with conditions of the colon, rectum and anus. His expertise encompasses inflammatory bowel diseases, such as Crohn's disease and ulcerative colitis; colon, rectal and anal cancers; diverticulitis (infection or inflammation of small pouches in the intestines); and pelvic floor disorders, including rectal prolapse, fecal incontinence (problems with bowel control) and constipation. He specializes in using minimally invasive surgical techniques to treat many of these conditions, including transanal endoscopic microsurgery (a procedure using special instruments to remove rectal tumors without surgical incisions). He also performs colonoscopies and endoscopies to screen for or diagnose conditions of the colon and rectum. Zhao conducts research on colorectal surgical outcomes, with the goal of making these procedures safer and more effective. He has a particular interest in using biomedical informatics (health-related datasets) to improve patient care. Zhao earned his medical degree from the University of Iowa Carver College of Medicine. He completed a residency in general surgery at the University of California, San Diego, where he also earned a master of advanced study degree in clinical research and completed a fellowship in clinical informatics. He completed a fellowship in colon and rectal surgery at Washington University in St. Louis, training at Barnes-Jewish Hospital.
His clinical expertise encompasses Anal Fissure, Proctitis, Rectal Prolapse, and Crohn's Disease.
Dr. Zhao is board certified in American Board Of Preventive Medicine/Toxicology, Clinical Informatics, American Board Of Colon And Rectal Surgery, Colon & Rectal Surgery, and American Board Of Medical Specialties, General Surgery. Dr. Zhao is currently accepting new patients.
Specialties
Licenses
Board Certifications
Fellowships
Hospital Affiliations
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- HMO
- POS
- PPO
- EPO
- HMO
- PPO
Accepted plan types not found. Please verify directly with the provider.
- OTHER MEDICAID
- STATE MEDICAID
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
1825 Fourth St., Fourth Floor, San Francisco, CA 94158
Additional Areas of Focus
Dr. Zhao has provided the following conditions as areas of focus. Please note that we may not have enough data to validate their experience in some of these conditions.
San Francisco Surgical Medical Group
caring, good listener, dedicated, intelligent, compassionate, committed, healing and reassuring. Dr. Yee is highly rated in 16 conditions, according to our data. His clinical expertise encompasses Hernia, Familial Colorectal Cancer, Colorectal Cancer, Hernia Surgery, and Bladder Reconstruction. Dr. Yee is board certified in Surgery General Surgery and Colon & Rectal Surgery. Dr. Yee is currently accepting new patients.
Michael Abel, MD Private Practice
Michael Abel is a Colorectal Surgeon and a General Surgeon practicing medicine in San Francisco, California. Dr. Abel is highly rated in 17 conditions, according to our data. His clinical expertise encompasses Colorectal Cancer, Familial Colorectal Cancer, Hernia, Bladder Reconstruction, and Hernia Surgery. Dr. Abel is board certified in Surgery General Surgery and Colon & Rectal Surgery. Dr. Abel is currently accepting new patients.
Center For Colorectal Surgery
Dr. Hueylan Chern is a colorectal surgeon at UCSF Medical Center. She specializes in minimally invasive procedures for conditions such as colorectal cancer, inflammatory bowel disease and diverticular disease. She has expertise in endorectal ultrasound, transanal endoscopic microsurgery and sphincter-preserving operations. In research, Chern's interests include endorectal ultrasound and colorectal cancer. Chern earned her medical degree at the University of Medicine and Dentistry of New Jersey (UMDNJ). She completed general surgery training at Brown University and a fellowship in colorectal surgery at UMDNJ, followed by additional oncology training at Memorial Sloan Kettering Cancer Center. Dr. Chern is highly rated in 9 conditions, according to our data. Her clinical expertise encompasses Familial Colorectal Cancer, Rectal Prolapse, Encopresis, Hernia Surgery, and Ileostomy. Dr. Chern is board certified in American Board Of Colon And Rectal Surgery, Colon & Rectal Surgery and American Board Of Surgery, General Surgery. Dr. Chern is currently accepting new patients.
Frequently Asked Questions about Dr. B M. Zhao
How do I make an appointment with Dr. B M. Zhao?
You can book an appointment with Dr. B M. Zhao by calling their office at 415-885-3606. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. B M. Zhao a top-rated expert for Anal Fissure?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. B M. Zhao is classified as an Experienced expert for Anal Fissure, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.
What conditions does Dr. B M. Zhao specialize in?
While Dr. B M. Zhao is a Colorectal Surgery, they have specific expertise in Anal Fissure, Proctitis, and Rectal Prolapse. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Colorectal Surgery.
Does Dr. B M. Zhao accept my insurance?
Dr. B M. Zhao accepts most major insurance plans, including Aetna and Anthem BCBS. We recommend calling the office directly at 415-885-3606 to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Experienced
- Anal FissureDr. Zhao isExperienced. Learn about Anal Fissure.
- ProctitisDr. Zhao isExperienced. Learn about Proctitis.

