Dr. Timothy Sowerby, MD

GastroenterologyMaleAge 58

Dr. Sowerby
Accepting new patients

Marin Gastroenterology

200 Tamal Vista Blvd # 200 Corte Madera, CA 94925

Make an Appointment

(415) 925-6900

Dr. Timothy Sowerby, MD is a Gastroenterology Specialist in Corte Madera, CA and has over 34 years of experience in the medical field. Dr. Sowerby has more experience with Pancreatic Disease, Liver Disease, and Gastrointestinal Disorders than other specialists in his area. He graduated from Charing Cross Westminster Medical Schools, University Of London medical school in 1987. He is affiliated with medical facilities MarinHealth Medical Center and Novato Community Hospital. He is accepting new patients. Be sure to call ahead with Dr. Sowerby to book an appointment.

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At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Recent Reviews
    Reviews made in the last 30 days. See reviews
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. See hospitals

Experience and Background Checks

Experience
Background

Background Check

No malpractice claims found for California
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Frequently Treated by Dr. Sowerby

Based on treatment records, we have identified the following as areas of care that Dr. Sowerby treats more often than their peers. If you are unsure whether Dr. Sowerby treats other conditions, please contact the office at (415) 925-6900.

Pancreatic Disease

Pancreatic disease specialists diagnose and treat conditions affecting the pancreas, such as pancraetitis.Compare with other Pancreatic Disease specialists.

Dr. Sowerby treats at a

normal

frequency compared to similar providers

Based on claims data for 1 condition or procedure

Treatments
Dr. Sowerby
Similar Providers
Pancreatitis
Normal
Frequency
High
Frequency
Very High
Frequency

Liver Disease

Liver disease specialists diagnose and treat conditions affecting the liver, such as hepatitis, fatty liver disease, and cirrhosis, through medications, lifestyle changes, or surgery.Compare with other Liver Disease specialists.

Dr. Sowerby treats at a

high

frequency compared to similar providers

Based on claims data for 8 conditions and procedures

Treatments
Dr. Sowerby
Similar Providers
Liver Damage from Alcohol
Viral Hepatitis
Cirrhosis
Hepatitis C
Normal
Frequency
High
Frequency
Very High
Frequency

Gastrointestinal Disorders

Gastrointestinal disorders specialists diagnose and treat conditions that affect the gastrointestinal tract, including Crohn's disease, ulcers, hernias, and food poisoning.Compare with other Gastrointestinal Disorders specialists.

Dr. Sowerby treats at a

high

frequency compared to similar providers

Based on claims data for 52 conditions and procedures

Treatments
Dr. Sowerby
Similar Providers
Constipation
Irritable Bowel Syndrome
Enteritis
Gastroesophageal Reflux Disease (GERD)
Normal
Frequency
High
Frequency
Very High
Frequency
Hide other treatment areas

Check Dr. Sowerby's experience treating your condition or procedure

Dr. Sowerby's conditions and procedures:

  • Abdominal Pain
  • Achalasia
  • Anal or Rectal Pain
  • Anemia
  • Anoscopy
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Bile Duct Procedure
  • Celiac Disease
  • Cirrhosis
  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Constipation
  • Crohn's Disease
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diffuse Esophageal Spasm
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Polypectomy
  • Duodenal Ulcer
  • Duodenitis
  • Dysentery
  • Dysphagia
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Enteritis
  • Eosinophilic Esophagitis
  • ERCP (Endoscopic Retrograde Cholangiopancreatography)
  • Esophageal Achalasia and Cardiospasm
  • Esophageal Diverticulum
  • Esophageal Motility Disorders
  • Esophageal Ulcer
  • Esophageal Varices
  • Esophagitis
  • Familial Adenomatous Polyposis
  • Fecal Impaction Removal
  • Gallstones
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Malabsorption
  • Gastrojejunal Ulcer
  • Gastroparesis
  • Giardiasis
  • Heartburn
  • Hemochromatosis
  • Hemorrhoids
  • Hepatitis A
  • Hepatitis B - Immune Response
  • Hepatitis C
  • Hiatal Hernia
  • Ileus
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Ischemic Colitis
  • Lactose Intolerance
  • Liver Biopsy
  • Liver Damage from Alcohol
  • Mallory-Weiss Syndrome
  • Manometry
  • Nausea
  • Neoplasm of Gastrointestinal Tract
  • Non-Alcoholic Fatty Liver Disease
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Pelvic Abscess
  • Peptic Ulcer
  • Pouchitis
  • Primary Biliary Cholangitis
  • Pyloric Stenosis
  • Reflux Esophagitis
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Viral Hepatitis
  • Vomiting Disorders

Insurance Check

Search for your insurance provider

Dr. Sowerby accepts

Accepted insurance can change. Please double-check when making an appointment.

(415) 925-6900

Dr. Sowerby accepts the following insurance:

Aetna
Aetna HMO
Aetna PPO
Choice Plus POS II
Choice PPO
Anthem
Advantage-CA HMO
Advantage-CA PPO
Balanced (Prudent Buyer)-CA PPO
Blue Cross (CACare) - Individual-CA HMO
Blue Cross (CACare) - Large Group-CA HMO
Blue Cross (CACare) - Small Group-CA HMO
Blue Cross (Prudent Buyer) - Individual-CA PPO
Blue Cross (Prudent Buyer) - Large Group-CA PPO
Blue Cross (Prudent Buyer) - Small Group-CA PPO
Blue Cross (Prudent Buyer) - Student Health-CA PPO
Blue Cross-CA HMO-POS
Bronze (Prudent Buyer PPO/ Small Grp)-CA PPO
Bronze EPO (Prudent Buyer / Small Grp)-CA PPO
Bronze EPO (Prudent Buyer EPO/ Small Grp)-CA
Bronze w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Dignity Health Custom Advantage-CA HMO
Dignity Health EPO / PPO-CA
Dignity Health PHC EPO & HDP/HSA-CA
Dignity Health Ventura EPO/PPO-CA
EPO-CA
Gold (CaliforniaCare HMO/ Small Grp) HMO
Gold (Prudent Buyer PPO/ Small Grp)-CA PPO
Gold Advantage-CA PPO
Gold EPO (Prudent Buyer / Small Grp)-CA PPO
Gold EPO (Prudent Buyer EPO/ Small Grp)-CA
Lumenos Plans-CA PPO
Major Risk Medical Insurance Program (MRMIP) - Prudent Buyer-CA PPO
MemorialCare Custom-CA PPO
National (BlueCard Basic) PPO
National (BlueCard) PPO
PERS Choice / PERSCare Providers-CA PPO
PERS Traditional-CA HMO
Platinum (CaliforniaCare HMO/ Small Grp) HMO
Platinum (Prudent Buyer PPO/ Small Grp)-CA PPO
Select Plus-CA HMO
Silver (CaliforniaCare HMO/ Small Grp) HMO
Silver (Prudent Buyer PPO/ Small Grp)-CA PPO
Silver Advantage-CA PPO
Silver EPO (Prudent Buyer EPO/ Small Grp)-CA
Silver EPO w/ H.S.A (Prudent Buyer/Small Grp)-CA PPO
Silver w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Tenet Network-CA PPO
Traditional
Traditional PPO
UC Care-CA PPO
UC CORE-CA PPO
UC Health Savings Plan-CA
UC High Option Supplement to Medicare-CA
UC Medicare with Prescription Drugs-CA PPO
UC Medicare without Prescription Drugs-CA PPO
UC Resident and Fellows-CA PPO
UCSHIP-CA PPO
USC Plan (Two Tiered Network)-CA HMO
Anthem Blue Cross
Anthem Blue Cross PPO
Prudent Buyer PPO
Blue Cross Blue Shield
Blue Card PPO
Blue Cross Blue Shield of California
Advantage Preferred DirectAccess Plus PPO
Blue Cross Blue Shield of California PPO
Select Plus HMO
Blue Shield of California
Access Plus Savenet
Blue Shield of California HMO
Blue Shield of California PPO
Local Access Plus HMO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
Cigna
Cigna HMO
Cigna PPO
Great West Healthcare-Cigna PPO
Open Access Plus
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Health Net of California
Large Group PPO
Medicaid of California
Medi-Cal
Medicare
Special Needs Plan SNP
MultiPlan
MultiPlan PPO
PHCS Network PPO
PHCS
PHCS PPO
SCAN Health Plan
Tricare
TriCare for Life
Triwest
TriCare/TriWest
UnitedHealthCare
United Healthcare PPO
Western Health Advantage
Western Health Advantage HMO

Dr. Sowerby's Reviews

Likelihood to recommend Dr. Sowerby

4.8

Based on 89 ratings

5 Stars
95.50561797752809%
(85)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
4.49438202247191%
(4)
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How likely are you to recommend
Dr. Sowerby?
(Select your rating)
What went well
  • Staff friendliness (79)
  • Listened & answered questions (78)
  • Appointment wasn't rushed (77)
What could be improved
  • Didn't listen or answer questions (3)
  • Didn't trust the provider's decisions (3)
  • Appointment was rushed (2)
RecentHighestLowestMost Helpful
Reply Flag
Dr. Sowerby and his team was Great!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Bernie Poppe – Feb 22, 2021
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Reply Flag
Dr Sowerby for a colonoscopy
What went well
  • Appointment scheduling
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Isaac Young – Nov 27, 2020
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Reply Flag
Dr. Sowerby, his staff, and facilities are world class. While these procedures and preparations can be difficult, Marin Gastro does an amazing job to keep the impact to a minimum and provides a highly supportive, safe and informative environment.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Erik K – Oct 22, 2020
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Reply Flag
Dr. Sowerby is a wonderful doctor. He really took the time to listen to my concerns, and gave me some great unvarnished options to consider. The actual colonoscopy was the paradigm of efficiency and professionalism.
What went well
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
What could be improved
No results
Helpful
Tom G – Oct 20, 2020
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Reply Flag
This group is one of the most comprehensive and responsive medical organizations I've run across in my many (over 60) years of receiving medical treatment. Both the prep work, a detailed set of questions asked of me and the responsiveness of the staff to questions I had, were well and above good, but rather superb. AND, Dr. Sowerby was able to detect some prior faulty diagnosis and treatment plans made by my previous Gastroenterologist. Anyone who wants an exceptionally skilled Doc, who works in an extremely well run and professional organization, should feel that this is THE place to go to for the best medical support
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Oct 14, 2020
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Reply Flag
Excellent communication. Dr. Sowerby and all the staff were friendly, professional and knowledgeable. All of the COVID 19 protocols that are in place made me feel very safe.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Joyce Carrera – Aug 26, 2020
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Reply Flag
I received excellent care from Dr. Sowerby and was attended by very knowledgeable and courteous staff. Also, the facility is clean and pleasant.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Aug 20, 2020
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Reply Flag
I find Dr. Sowerby to be very professional and thorough. I am grateful for his knowledge and prompt response to my procedure.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Margaret (Peggy) Devincenzi – Aug 19, 2020
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Reply Flag
Top notch service.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Kamyar – Aug 06, 2020
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Reply Flag
My July 22, 2020 visit was the latest of my scheduled 5 year colonoscopy appointment cycles as well as a first time endoscopy to look for any problems associated with my recent experiences with GERD. Again, I have found Dr. Sowerby and his staff to be absolutely first rate professionals. Additional kudos for the care and covid infection prevention measures taken beginning with the wonderful folks at reception right up to my discharge from the facility. As mentioned by earlier reviewers I also appreciate the efficiency and timeliness with which my appointment was set up, the friendliness and helpfulness of staff, the informational thoroughness regarding preparation for the procedure(s) itself, and the overall skills of all involved.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
john kaiser – Aug 04, 2020
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Reply Flag
Dr Sowerby - Lucky to have such a caring and understanding doctor, he's the best. Pain in my lower right abdomen. His office is wonderful, able to work me in for a video meeting with Dr Sowerby. Scheduling dept was able to set an early appointment at the hospital for the procedure; happily everything turned out well. Thanks again to Dr Sowerby and his office staff.
What went well
  • Appointment scheduling
  • Staff friendliness
  • Listened & answered questions
What could be improved
No results
Helpful
Jun 30, 2020
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Reply Flag
Due to a family history of colon cancer, I undergo regular monitoring via colonoscopies. I visited Dr. Sowerby in Feb 2020 for my third one since turning age 40. The entire process could not have been easier or more pleasant. From the initial contacts with his staff, arranging the appointment, confirming medical history, receipt of instructions for prep, and the procedure itself, everyone did a fantastic job. Excellent bedside manner for Dr. Sowerby, nurse, and anesthesiologist. Sedation was perfect. I had several polyps removed and received prompt report that all were benign within one week. I will definitely continue to see Dr. Sowerby! Many thanks to him and his staff!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Angie – Feb 22, 2020
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Reply Flag
I first had a procedure done by another doctor in his clinic. Then I had a procedure done by Dr Sowerby. When I called for an appointment to see any doctor regarding a medical issue I was told I could NOT see another doctor since I had chosen Dr Sowerby who was going on vacation until the end of March. What kind of medical service is that! Poor in my opinion
What went well
No results
What could be improved
No results
Helpful
Hank Miller – Feb 21, 2020
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Reply Flag
Dr. Sowersby is extremely professional and very patient. He took his time and listened to all of my issues, and then followed up with pertinent questions and explanations as to why he needed additional information. He even takes the time out to write down (on a real piece of paper) instructions for medications and other information to remind his patients what to do. Additionally, his staff is extremely efficient. All calls are returned in a timely manner with clear instructions.
What went well
No results
What could be improved
No results
Helpful
John Murphy – Jan 31, 2020
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Reply Flag
excellent care - everyone involved -skilled, professional and courteous
What went well
No results
What could be improved
No results
Helpful
harry rosenbluth – Dec 24, 2019
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Reply Flag
From start to finish, the visit was quick and the nurses were very kind and helpful. Dr. Sowerby stopped in prior to the procedure as well as the anesthesiologist which helped to alleviate any anxiety about the procedure. The nurses were there for the post op and all went well.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Jul 30, 2019
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Reply Flag
The office moves quickly and efficiently, yet you feel that all of the right questions are being asked, safeguards taken, and feeling comforted by Dr. Sowerby and his staff..
What went well
No results
What could be improved
No results
1 person found this helpful
Helpful
May 21, 2019
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Reply Flag
I appreciated Dr. Sowerby's consultation and treatment. He was caring and efficient.
What went well
No results
What could be improved
No results
Helpful
Apr 06, 2019
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Reply Flag
Everyone was very nice and handled my procedure quickly and efficiently. They were very concerned with my comfort.
What went well
No results
What could be improved
No results
1 person found this helpful
Helpful
Apr 05, 2019
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Reply Flag
The procedure experience was impressive. Well organized-great bedside manner by everyone on the team. Thank you.
What went well
No results
What could be improved
No results
1 person found this helpful
Helpful
Mar 13, 2019
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About Me

Care Philosophy

At Marin Gastroenterology, we specialize in the diagnosis, treatment and prevention of diseases of the digestive system. We provide consultations both...Read more

Specialties

  • Gastroenterology

Board Certifications

Education

1995
Kaiser Los Angeles
Fellowship Hospital
1993
Kaiser San Francisco
Residency Hospital
1991
Kaiser Permanente San Francisco Medical Center Geary Campus
Internship Hospital
1987
Charing Cross Westminster Medical Schools, University Of London
Medical School

Awards

Frequently Asked Questions

Is Dr. Timothy Sowerby, MD accepting new patients?

Dr. Timothy Sowerby, MD generally accepts new patients on Healthgrades. You can see Dr. Sowerby's profile to make an appointment.

Does Dr. Timothy Sowerby, MD accept my insurance?

Use the Healthgrades insurance check to verify if Dr. Sowerby accepts your insurance.

What are Dr. Timothy Sowerby, MD's top areas of care?

Dr. Sowerby frequently treats Pancreatic Disease, Liver Disease, and Gastrointestinal Disorders. See all practice areas where Dr. Sowerby specializes.

Where is Dr. Timothy Sowerby, MD's office located?

Dr. Sowerby's office is located at 200 Tamal Vista Blvd # 200, Corte Madera, CA 94925. Find other locations and directions on Healthgrades.

Does Dr. Timothy Sowerby, MD offer telehealth services?

Dr. Sowerby has not yet indicated whether they offer telehealth services. Please contact the office to check for availability/eligibility.

How can I make an appointment with Dr. Timothy Sowerby, MD?

Find contact information here to make an appointment.

Locations

Marin Gastroenterology

Marin Gastroenterology200 Tamal Vista Blvd # 200 Corte Madera, CA 94925
1
  • Call
  • Fax
  • Hours
    • Mon: 8:00am - 5:00pm
    • Tue: 8:00am - 5:00pm
    • Wed: 8:00am - 5:00pm
    • Thu: 8:00am - 5:00pm
    • Fri: 8:00am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

Affiliated Hospitals

Dr. Sowerby is affiliated with the following hospitals. Select a hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

MarinHealth Medical Center

Greenbrae, CA

66% Patient experience rating, 3% lower than the national average

4 Awards Received

Novato Community Hospital

Novato, CA

78% Patient experience rating, 9% higher than the national average