Southern California Sinus Institute

Sinus Center of Excellence

Awarded best sinus surgeon in LA

Dr. Alen N. Cohen


Recognized as one of the best sinus surgeons in Los Angeles, Dr. Alen Cohen, is founder and director of LA’s Premier Sinus Center

Dr. Cohen has been recognized as a Los Angeles Magazine Super Doctor since 2013 and a Castle-Connolly Nationally Recognized Nose and Sinus Surgeon since 2017. Founder and director of The Southern California Sinus Institute, a nationally recognized sinus center of excellence, serves the greater Los Angeles, San Fernando Valley and Ventura County areas. The Southern California Sinus Institute was founded in 2009 and specializes in the medical and surgical treatment of patients with all nasal and sinus disorders including nasal obstruction, deviated septum, hypertrophic turbinates, environmental allergies, acute and chronic sinusitis, nose and sinus polyps, recurrent severe and debilitating sinus infections and sinus headaches.

ENT Treatment Methods

Our Services

Why Choose So Cal Sinus

Our Advantages

  • Awarded Best Sinus Surgeon in LA
  • Board Certified Nose, Sinus, Head & Neck Surgeon
  • Over 15 years of experience
  • Sinus Center of Excellence
  • Over 10,000 nose & sinus procedures
  • Over 3,000 in-office balloon procedures



Dr Cohen couldn’t have been more professional and caring in diagnosing my sinus problem and performing sinus surgery. He is thorough and kind. His office staff is extremely polite and professional. My procedure went smoothly without any complications and Dr. Cohen’s follow care is exemplary. I wouldn’t go to any other ENT specialist in my area.



If I could give Dr Cohen, Dr H and the staff 10 stars I would. My Wife had been having nasal and allergy issues for over 25 years. She also had a couple things about her nose that she did not like aesthetically. After meeting with both doctors, we knew these were the right ones to do the surgeries. The office staff from the front desk, to nurses, to back office staff and the doctors were as helpful and friendly as any office I have ever been to. Same is true for the surgery center. Dr Cohen made it so she can breathe and Dr H did a masterful job giving my Wife the look she wanted. I cannot say enough great things about our experience at C/V ENT group and with these 2 doctors. Highly recommend them!



I went to see Dr. Cohen because I was having breathing issues. He suggested that I have a balloon procedure which he explained to me in depth. I decided right there to have that procedure and now I am almost 2 weeks from the procedure and I am having no issues with my breathing. I am only about 65% healed so far. I highly recommend Dr. Cohen. He delivered on his commitment, spends time with his patients, and, his office staff is wonderful!



I’ve been plagued by bronchitis and sinus issues for years. Dr. Cohen was so thorough and thought outside the box. His office staff is efficient, assistance well trained, and the doctor is a joy. He’s seriously an excellent physician.



Dr. Cohen sets the bar for how all doctors should strive to be. He is very friendly, knowledgeable and takes time to answer all questions. During the balloon Sinuplasty procedure, Dr. Cohen explained to me each step and made it comfortable. He provided very detailed post-op instructions and answered my questions via email within the hour! Very few doctors take the time to care for their patients like Dr. Cohen. I am very happy I chose him to care for my medical needs and highly recommend him to anyone suffering from sinus issues.



Had recurring head colds (for two years) and mild allergies. Result: endless congestion, sneezing and ear popping. Consulted with Dr. Cohen and decided to do the balloon sinuplasty procedure. It’s not a guaranteed cure-all, but I’m feeling much better already and it’s been 2.5 weeks since the procedure.

Dr. Cohen is very friendly and professional and the procedure was painless. It’s a relatively new procedure, which is why there aren’t that many first-hand accounts of it online. Needless to say, I was nervous. Dr. Cohen gave reassuring answers to all my last minute paranoid questions and I am very glad I went ahead with the whole thing.

Please avoid reading horror stories online. Dr. Cohen has perfected his technique and knows what he’s doing. The staff is friendly and meticulous both at the office and over the phone.

Highly recommended!



Dr Cohen did my parathyroid tumor surgery in 2012. He made the entire process seamless. Now I understand he is no longer doing this procedure and I am potentially facing another surgery. Looking for recommendations. Really bummed. I really felt that I was in the best place on the West Coast with Dr Cohen. Wishing he would consult with an established patient.



If I listed all the things that make Dr. Cohen a phenomenal doctor, I’d probably write a 500 page novel. For many years, I have been dealing with a number of health issues, and every doctor, especially ENTs, that I’ve been to, have made me feel like it’s all in my head. Within about ten minutes of meeting me, Dr. Cohen identified a condition that could be related, or the cause, of all my other health issues, which I have always suspected. He’s referred me to other specialists who he works with, so they can treat me together. Never in my life have I had a doctor who has not only validated my concerns and theories, but has gone the extra mile to treat me. When I called his office, he personally called me back, even after a long day of surgery. He has given me hope, which I haven’t had in a very long time, and for that I am eternally grateful.

Thank you Dr. Cohen.



What an amazing ENT! I’ve been struggling with my Ears, Nose, and Throat since I was a child. I finally found the doctor I can turn to for help and he knows how to help his patients. Now let’s talk about his patience and how incredible he is with people- he does not rush you, he doesn’t cut you off, or make you feel stupid for asking questions- he explains and visually shows you what’s wrong or may be the issues, in my case with my breathing, etc. I highly recommend him and so grateful he finally fixed me! Thank you Dr. Cohen- you’re incredible!!!!!

If you need a 10 out of 10 ENT, Dr. Cohen is the guy!!



Dr Cohen has changed my life. After an unsuccessful surgery for my sinuses by a highly recommended Dr. he was able to correct the previous unsuccessful surgery and now I have been free of my chronic sinusitis for ten years. I continue to maintain a clear head and have been congestion and pain free by following his prescribed maintenance plan. I see him for yearly check ups and continue to be in good health. Thank you Dr. Cohen.



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