Welcome to the California Sinus Centers
California Sinus Centers are the premier centers of excellence in Northern California for the care of patients with disorders of the nose and sinuses. At Cal Sinus we aim to provide the best possible care to our patients in a comfortable and compassionate environment. Our providers are highly experienced surgeons (over 3000 cases) and are fellowship trained surgeons who are national and international leaders in the field of rhinology. Through efforts in clinical care, education and research we strive to improve your sinuses and overall health.
California Sinus Centers Walnut Creek – New Location
California Sinus Centers Walnut Creek will be moving to a new location! Dr. Karen J. Fong and her team will be joining the growing group of physicians practicing at the BASS Medical Group main office at 2637 Shadelands Drive, Walnut Creek, CA 94598. Dr. Winston Vaughan will continue seeing East Bay patients at this location as well. Though the new Walnut Creek location will not have a CT scanner on-site, patients will still have access to imaging services through other providers in the BASS Network.
Dr. Fong’s first clinic day at this location will be Monday, March 25, 2019. If you have any questions or concerns regarding this move, please call our office at (925) 300- 4680.
Dr. Vaughan’s first clinic day at this location will be Friday, April 5, 2019. If you have any questions or concerns regarding this move, please call our office at (650) 399-4630.
*Dates are subject to change*
Click here to download (pdf) map to new location
Your Visit to Cal Sinus
During your visit to Cal Sinus, you will undergo a sinus examination with a nasal endoscope. The endoscope will allow your provider to look deeper into your sinuses than with traditional instruments. Your safety and comfort are our top priorities; prior to your nasal endoscopy, you will be sprayed with medication that will decongest and numb your nasal passages. Additionally, you'll be able to view your exam in real-time with personal video glasses.
In Office Nasal Endoscopy
Low Dose CT Scan
A CT scan is a common diagnostic tool used to get an inside view of your sinuses. For your safety and convenience, we offer low-dose CT imaging at many of our locations. The Xoran MiniCAT CT pictured above provides a 10-50 fold reduction in effective radiation compared to conventional CT imaging and ensures the safety and comfort of our patients.
Sinus CT Scan
Patient Reviews
After moving to California from the midwest several years ago, allergies became a real thing for me to manage. For a while, I was getting chronic sinus infections and my allergist connected me with Dr. Vaughan who performed a sinus surgery. I've been seeing Dr. Vaughan ever since for all of my various ENT issues, of which I have many. Dr Vaughan has always been amazingly responsive to my medical needs, questions and sometimes just complaints. In fact, I see him more than my own primary care doctor, because he always listens and get's me back on track.
- 2/21/2019 Martin E., Yelp.com
Dr V. is a master of his craft. I have chronic sinus issues and have seen a number of ENT. Dr. Winston Vaughan is simply the best. He command of his field a medicine is unparalleled. He bedside manner is superb. He practice management is terrific. He and his staff put patient care of the top of the list. Never a problem getting an appointment. Finally he is just a great guy!!!
- 1/24/2019 Michael B., Yelp.com
I have been a patient of Dr. Vaughan for over 4 years now. I have a complicated case of lifetime sinus infections, headaches, polyps and congestion. Dr. Vaughan is the first doctor to really explain my issues as they arise and the best course of treatment, which is usually very effective. One time when I was really suffering Dr. Vaughan called me at home on Christmas Day to see how I was doing. I would say he is one of the best sinus docs in the country...and I have seen many of them. Dr. Vaughan never seems rushed, has a great bedside manner, and is extremely skilled at his craft. I see some of these reviews about problems with paperwork, printers and such and it seems so petty. What matters is the effectiveness, confidence, and bedside manner of the doctor. I have never had any issues with the staff who have mostly been with Dr. Vaughan for years and adore him. They are also kind and considerate. I travel from Reno to Atherton, CA for my visits and feel blessed that I have such a great sinus clinic to help manage my condition.
- 12/18/2018 Eben D., Yelp.com
Even with all your positive Yelp reviews, I was initially a little bit skeptical because I had been experiencing such severe symptoms for so long and had been told by numerous physicians that I would be unable to be helped. I was afraid to be disappointed once again, however no disappointment here. I'm very fortunate to have found you as a provider. Thank you again for helping to improve the quality of my life and for all your help and patience regarding the entire perioperative process.
- 9/17/18, Tim
Dr. Karen Fong is one of the best doctors I have ever had. I have been her patient for nine years now. I had an awful sinus problem that Dr. Fong was able to completely fix! She is extremely knowledgeable and always up on the latest advances in medicines and practices. She is always patient, caring and will always make sure you are comfortable. She also makes herself available to her patients most anytime. I feel very lucky to have her as my doctor.
- 8/28/2018, Paula B., Yelp.com
Dr. Vaughan is AMAZING! He did my husband's surgery and everything went extremely smoothly. His bedside manner is wonderful and his staff is great! Very happy we found an excellent Dr that cares!
- 5/11/2018, Jessica L., Yelp.com
I met Dr. V with a painful CPAP related sinusitis. He is a well-trained, personable and experienced sinus surgeon with a friendly and thorough bedside manner that immediately created a mood of competence and reassurance for me, as a surgeon myself, that I was seeing the right guy. He has a happy, gentle and understated demeanor. His professionalism is outstanding, and his surgical skills exceeded his reputation, as well as my expectations. In my opinion, if he can't do it, then it can't be done.
- 9/4/2017, Vitals.com
Not much to say that others haven't said. I've seen half a dozen ENTs over the past five years and Dr. Vaughan and his staff, as well as Kathleen Low (NP who also sees patients), are by far the best. Going to the ENT for sinus issues used to be extremely stressful, but the experience here (Atherton office) is the opposite.
- 3/6/2017, Erin H., Yelp.com
If you want the best there is, Dr. Vaughan is it! I have been his patient since his Stanford years and have followed him everywhere. I will travel to any of his offices to see him. He is gentle, caring, and a most talented doctor. He is the only doctor I trust to care for my sinus disease, and perform the necessary endoscopic cleanings for fungal and bacterial infections. I will be his patient for life! Thank you Dr. Vaughan for all you do.
- 9/23/2016, Sherry L., Yelp.com
Dr. Fong is incredible. She listens intently, is thoughtful, sharp, thorough, and friendly.
- 11/5/2013, Vitals.com
I highly recommend the California Sinus Centers for anyone struggling with sinus disease and chronic sinusitis. This facility provides the highest medical care and treatment. There is no other comparison. Dr. Vaughan and his associates diagnose and treat at your first visit and subsequent. They have CT scans and video cameras to view your sinuses. I am so grateful to find Dr. Vaughan. He is fantastic and so [are] his centers.
- 6/25/2014, Isabella Z., Yelp.com
Had S cyst removed from a deep sinus by Dr. Karen Fong. Talk about personal care and making you feel like you matter as a patient! First, Dr. Fong was very clear and patient to go over my test results, options and explained the pros and cons. During the surgery, she was very reassuring, and came to check on me after I regained consciousness. During the recovery, she answered my phone calls AT NIGHT to answer my questions and my texts! Her staff is also very professional. It’s been 8 months now since my surgery; haven’t had a stuffed nose, or a cold. Highly recommended.
- 7/21/2014, Danny W., CSC Walnut Creek first review on Yelp.com
I fly from San Diego to see Dr Vaughn. I was sick for 3 years with an infection nobody could cure. I was sent up to see him since he is one of the top sinus doctors in the country. He 's a rock star!!!! I can honestly say he has saved my life. I had run out of drugs that worked. I had pick line in my heart to push the antibiotics directly in. I was so weak it was hard to get out of bed just to use the bathroom. Not anymore....he has me 85% well. Seriously, he is one of the best in the country with advanced equipment and advanced training from Stanford. If you suffer from chronic sinus infections or have advanced sinus disease...this is the man.
- 11/5/2012, Louis V., Yelp.com
Dr. Vaughn is the best of the best. He goes absolutely above and beyond to provide patients with competent and personal care. He is accessible to patients by email and phone and is always prompt to respond. Dr. Vaughn's office is a precision run operation and they always get me in early. I have been profoundly impressed by Dr. Vaughn and his office and recommend him without any reservations.
- 7/20/2012, Hannah P., Yelp.com
Dr. Vaughn is top notch. Professional, gentle, excellent bedside manners and really good at what he does. His staff, Kathleen, is outstanding, too. They were able to diagnose a long standing sinus infection and get it treated with the right antibiotics. They have state-of-the-art equipment which makes it possible to get a CT scan in their office with immediate results. Beautiful offices and ez parking.
- 2/8/2011, Yelp.com
I have to agree with all the great reviews on Winston Vaughan and his office. I searched long and hard after having a not-so-great experience a few years ago and I was relieved to have found this office. The staff is friendly, competent, knowledgeable and best of all, every person I interacted with, from John, the new patient intake person; to the receptionists; Kathleen, the nurse practitioner; and finally Dr. Vaughn himself, were all very empathetic about my fear of the procedure. They invited me to ask as many questions as I wanted and their standard procedure is to show patients the procedure as it's occurring should they wish to watch. They even redid a part of the exam so I could have a cd of it to show to my kids. Dr. Vaughn was pre-warned by his staff that I was nervous and he came in and put me completely at ease. Highly recommended!
- 12/8/2011, Lisa B. Yelp.com
hoped for a more caring, friendly and FUNNY doc to put my faith in. The surgery center he uses is really great too. I recommend Dr. Vaughan whole-heartedly. He's a great doctor! Good luck!
- 9/16/2008, CSC Atherton first review on Yelp.com
Karen J. Fong, M.D.
Winston C. Vaughan, M.D.
Kathleen Low, NP
Dorothy Yip, PA-C
Ashley - Atherton
Jackelyn – Atherton 
Jonalynn - Atherton
Kimberly - Atherton
Monique - Atherton
Phil - Atherton
Alejandra - Walnut Creek
Beatrice - Walnut Creek
Elena - Walnut Creek
Desiree - Fresno/Clovis
Jose - Fresno/Clovis
Vanessa - Fresno/Clovis
Kelsey - Fresno/Clovis