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Welcome to California Sinus Centers

We're dedicated to providing the highest level of sinus care throughout Northern California

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"I feel so blessed you came our way.

I’m so grateful we are on the road to recovery! Thank you for investing your knowledge, skills, and compassion towards my son."

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"Your kindness, competency and efficiency make us feel very safe in your care.

Your top-notch office associates are truly the benchmark that we now measure all office encounters by!"

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Find an Office: Atherton · Pleasanton · Sonoma · Walnut Creek

Sinus Specialists in the Bay Area

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.

Advanced Sinus Care

California Sinus Centers specialize in the diagnosis and treatment of complex disorders of the nose and paranasal sinuses.


Our sinus experts are available at locations throughout Northern California’s San Francisco Bay Area and Peninsula.

Your Upcoming Visit

Be prepared for your upcoming appointment by accessing our patient information area

In Office Technology

At the California Sinus Centers we are committed to incorporating technology into our practice to provide the safest, most effective and accessible sinus care to you and your family members.

Meet Our Providers

Karen J. Fong, M.D.
Karen J. Fong, MD
Winston C. Vaughan, M.D.
Winston C. Vaughan, MD
Kathleen Low, NP
Kathleen Low, NP
Dorothy Yip, PA-C
Dorothy Yip, PA-C

What Our Patients Are Saying

5 Stars

Jan 5, 2023

I’ve been seeing Dr. Vaughn for several years. He is very thorough and cares about the progress of my sinus issues.
5 Stars

Dec 6, 2022

Dr. Fong and her team are some of the kindest providers I have ever worked with. They listen, provide proactive suggestions and clear communication. I feel like I’m in great hands and getting excellent care for my sinus issues with a team that truly cares about me!
5 Stars

Dec 6, 2022

I highly recommend Dr Vaughn and the California Sinus Centers. Both the doctor and his staff are thorough and competent . They have state of the art equipment and are able to precisely diagnose and treat sinus infections.
5 Stars

Dec 6, 2022

Dr. Vaughn is the smartest and nicest doctor I’ve ever been to. I drive 4 hours each way just to see him. He and his staff are very professional and always run on time. I’m usually in and out in under 30 minutes. He is on the cutting edge of research, procedures, and use of unique pharmaceuticals. I highly recommend him!
5 Stars

Oct 29, 2022

Dr. Vaughan is an excellent sinus doctor. He has been managing my serious, chronic sinus condition for many years. He is very knowledgeable, highly skilled, and careful and thorough in his treatment. He also takes the time to listen to your questions and discuss things with you. Nurse Practitioner, Kathleen Low, is also highly skilled and a great resource, and all the staff at California Sinus Centers are pleasant and professional.
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What’s New at California Sinus Centers

Signs You Have A Deviated Septum

Some people are born with it, others develop it from a trauma. By definition, a deviated septum is when the bone and cartilage that divides our nose and nasal cavity is off center, misaligned, or crooked which makes one nasal passage smaller. Now that you know what it is, let’s learn more including some signs…

Why Am I Getting Sinus Headaches Everyday?

Those who have had infrequent sinus headaches cannot even imagine having one everyday. The painful symptoms and pressure in your eyes and face are excruciating. Maybe you have chronic sinusitis, or is it something else? Causes And Symptoms Of Sinus Headaches Causes of a real sinus headache are an infection in your sinuses known as…

Nasal Polyp Surgery: What To Expect

Nasal polyps are a fairly common condition, and many people don’t know they exist if they are small. They are benign growths, usually tear-dropped shaped, that line your nasal cavity or sinuses. If they begin to affect breathing or cause other issues, your doctor may recommend nasal polyp surgery. Symptoms Of Nasal Polyps Although these…

Ready to get started?

Contact us today to request an appointment with Northern California’s premier sinus center