Accepting new patients
Mahtab Moshtagh Sisan, MD
- Sleep Medicine
Average rating:
4.9
Star ratings are displayed only for those physicians who participate in UCLA Health’s patient experience survey program and have received a minimum of 30 survey responses.
Santa Clarita Primary & Specialty Care
|
25775 McBean Parkway, Suite 115A
Valencia,
CA
91355
US
Languages
Education
Medical Board Certifications
Sleep Medicine, American Board of Family Medicine, 2023
Family Medicine, American Board of Family Medicine, 2021
Fellowship
Sleep Medicine, University of California, Los Angeles, 2022
Residency
Family Medicine, University of California, Riverside, 2021
Degree
MD, St. George's University School of Medicine/Grenada, 2018
Locations
Hospital Affiliations
Ronald Reagan UCLA Medical Center
UCLA Santa Monica Medical Center
Insurance
- Aetna
- Anthem Blue Cross
- Blue Shield of California
- Centivo
- Cigna
- First Health
- Health Net of California
- Interplan (part of HealthSmart)
- Medicare Advantage
- MultiPlan
- UFCM Health System
- Prime Health Services
- Private Healthcare Systems (PHCS)
- TRICARE
- UnitedHealthcare
The list of health care plans above may not be comprehensive and could change.
Please contact your benefits coordinator or health insurance company directly to verify coverage.
Visit our health insurance information page for more details.
Reviews
Overall rating:
4.9
Star ratings are displayed only for those physicians who participate in UCLA Health’s patient experience survey program and have received a minimum of 30 survey responses.
309 total ratings |
218 reviews
5.0
February 27, 2026
Very good!
5.0
February 24, 2026
Dr Moshtagh was great... knew exactly how to best advise me with my condition.
5.0
February 24, 2026
Very good experience with the doctor
5.0
February 20, 2026
She was very thoughtful and thorough and I appreciate being able to get in early due to a cancellation.
5.0
February 17, 2026
My doctor explained everything to me that I needed to know about my health.
5.0
February 12, 2026
Very attentive and knowledgeable on my situation.
5.0
February 10, 2026
Ery good
5.0
February 10, 2026
Dr. Sisan is amazing. She's empathetic, smart, and truly cares about getting to the source of one's sleep condition.
5.0
February 10, 2026
Excellent in every way: supportive, helpful and attentive. As always. Thank you !
5.0
February 9, 2026
Awesome experience
5.0
February 1, 2026
The doctor was extremely good. High on the humanity scale. High on the expertise scale.
5.0
January 28, 2026
Dr Sisan is very thorough in analyzing my sleep data and then making suggestions for changes to improve my sleep and decrease the “events”! I appreciate her kindness and concern for my health! I feel blessed to have recently found such a great doctor!!
5.0
January 28, 2026
She was very professional, accomodatinh and generous with her time. She was also funny and put me at ease
5.0
January 26, 2026
Dr Sidan is knowledgeable, considerate and professional in her approach to my condition.
5.0
January 21, 2026
Dr. Sisan was very professional, caring, and respectful.
5.0
January 21, 2026
I really like this doctor!!
5.0
January 20, 2026
She was very familiar with my information even though it was the first time I saw her. She went over all my meds with me. She was easy to talk to and listened. She asked me a number of times if I had more questions and was ready to listen.
5.0
January 14, 2026
Dr very caring. Listens to your concerns and doesn’t rush you. Amazing doctor
5.0
January 14, 2026
Communicative. Friendly. Thourough. Empathetic. Excellent experience overall.
5.0
January 13, 2026
Dr. Susan was very thorough and helpful. Asked me all pertinent questions regarding my health issues with sleep deprivation. I was very happy with her interaction and friendliness.
5.0
January 12, 2026
Excellent
5.0
January 12, 2026
Dr Sisan and her staff are amazing
5.0
January 12, 2026
Wonderful, She is the best at what she does. Always ready to listen and help. I will recommend her to anyone and everyone.
5.0
January 6, 2026
She was very personal, understood the issue, went the extra mile in making sure I understood how to care for the issy and you could tell she cared and I really enjoyed speaking with her!
5.0
January 6, 2026
Dr. Sisan is very knowledgeable about taking good care of me. She listened to all my questions and answered them with lots of patience. I really appreciate the service she provided. Thanks to UCLA hospital and Dr. Sisan!
5.0
January 5, 2026
Great!!! Timely, professional and speedy
5.0
January 4, 2026
Very professional! Thanks for the great service!
5.0
January 2, 2026
The doctor was a good listener and provided useful insight as I move forward.
5.0
January 1, 2026
She explained everything in an easy to under Manner
5.0
December 31, 2025
Ver helpful
5.0
December 31, 2025
I thought i might have strep throat, so I went into their walk in clinic/urgent care. They warned that I may have to wait 1.5 hrs. I was called in within 30 mins. They did a throat swab which came back negative, yes! The doctor came in and gave me instructions to let my throat heal. Great visit.
5.0
December 31, 2025
Dr listened to our symptoms. Very very compassionate and analytical Explained what we need to do to recover and what to look for if we get worse. Very thorough practitioner. Love her!!
5.0
December 31, 2025
Doctor was pleasant and I felt better after seeing her
5.0
December 30, 2025
First and foremost, I was very excited that there was very little wait time to be seen. The nurse and doctor where incredible and so professional. Thank you.
5.0
December 30, 2025
Dr Sisan listened to me and really made me feel better about the action plan to remedy my symptoms! She was also very funny and made it clear to me what I needed to do going forward.
5.0
December 29, 2025
It was a good visit. I had a good understanding. What’s my problem thank you.
5.0
December 28, 2025
She was attentive, compassionate, patient and kind. She offered multiple solutions to deal with the discomfort I was having.
5.0
December 28, 2025
absolute excellent care .. listened well and didn’t rush .. she looked at my entire history and tool her time with me
5.0
December 27, 2025
Caring and professional
5.0
December 27, 2025
Excellent reception and best treatment.
5.0
December 26, 2025
Very helpful; made me feel very comfortable and grateful to have healthcare providers like her.
5.0
December 20, 2025
Listened to my concerns.
5.0
December 20, 2025
Doctor was exceptional. She was very attentive, knowledgeable, and caring.
5.0
December 18, 2025
Everything covered and got referrals for x-rays
5.0
December 18, 2025
Clear and concise with me but also very warm personality
5.0
December 17, 2025
Dr Susan is wonderful expert in her field and a great person who was able to improve my sleep apnea to a level that allows me to sleep again properly. Could not have been better.
5.0
December 17, 2025
She listens
5.0
December 17, 2025
Caring & knowledgeable doctor
5.0
December 16, 2025
She’s very thoughtful and understanding takes her time and listens to what I have to say
5.0
December 16, 2025
Extremely professional! Asked me lots of questions.
5.0
December 16, 2025
Great help and I appreciate it
5.0
December 11, 2025
Very satisfying talking with the doctor. She’s very understanding and professional. Fir which I’m very grateful.
5.0
December 3, 2025
Dr Susan is wonderful! Kind, smart, and took the time to listen to my concerns!
5.0
December 3, 2025
Dr Susan is always excellent: attentive, helpful, understanding and supportive. Thank you!
5.0
December 2, 2025
Wonderful!
5.0
November 26, 2025
Dr Sissan is extremely knowledgeable in the treatment of sleep disorders. It’s clear that she understands my specific issues and is continuously working to help me.
5.0
November 25, 2025
Nice DR. GOOD LISTENER. I felt I was heard.
5.0
November 24, 2025
My Sleep Medicine Doctor is always so beautiful and kind. She explains everything in such detail that it's clearly understandable.
5.0
November 21, 2025
She is very polite nd listens to you. I don’t feel rushed
5.0
November 21, 2025
Dr. SISAN was patient, thoughtful and thorough. It was a pleasure to meet her.
5.0
November 19, 2025
Dr. Sisan always outstanding nice, polite, friendly; her questions meaning she is really care of my condition and feelings. I'm grateful I can be one of her patient, because her knowledge and her attitude is the best.
5.0
November 17, 2025
She’s empathetic, supportive, and extremely knowledgeable.
5.0
November 17, 2025
Dr Mahtab is awesome She is always giving me advice on how to manage my sleep better. Taking sleeping pills, trazodone to help me go to sleep and get more rest.
5.0
November 16, 2025
I was extremely impressed with the whole process from start to finish. Everyone treated me so well and the process went smoothly. The doctor was great. She made me feel seen and heard and all my concerns were addressed and questions answered. I received the care that I needed. She was very warm and kind too.
5.0
November 11, 2025
She took time with me and was familiar with my chart. Great Doctor
5.0
November 10, 2025
Dr. Sisan answered my questions & actually listened to my concerns. I did not feel rushed through my appointment. Front desk staff is personable & efficient
5.0
November 10, 2025
Always a pleasant visit with Dr Sisson. She is very personable and professional. She is a great listener and provides feedback.
5.0
November 4, 2025
She explained the sleep study results clearly and made sure I had a clear understanding of the results.
5.0
November 3, 2025
Informative, friendly
5.0
November 3, 2025
It was great! The doctor answered all my questions!
5.0
November 1, 2025
She was very thorough and gave me a referral to a podiatrist.
5.0
October 29, 2025
Dr. Moshtagh was very thorough and clear.
5.0
October 29, 2025
Listened and provided feedback and followed through on next steps discussed
5.0
October 29, 2025
Thorough!
5.0
October 29, 2025
I appreciate Dr. Sisan's time and care. Thank you
5.0
October 29, 2025
She is great!
5.0
October 28, 2025
Office is friendly, Doctor is friendly, personable, and knowledgeable. It's a [pleasure at Dr. Sisan's office.
5.0
October 28, 2025
Dr was very thorough and accommodated new data that I provided her. Interpreted it and made sure that I understood what needs to be done. She was very helpful in seeing me as a whole person who needs treatment specific to my needs.
5.0
October 27, 2025
Great communicator and solution advisor
5.0
October 24, 2025
Very kind doctor. She told me she will help me to find out if I have sleep apnea.
5.0
October 24, 2025
Good
5.0
October 21, 2025
Dr. Sisan is awesome - very easy to talk to and encourages to ask questions.
4.0
October 21, 2025
Very good medicine given i had a reaction Urine dark stomach pain and tender called my GP told to go to lab and test Urine.
5.0
October 21, 2025
Dr. Sissan was very good at listening to my descriptions of my health concerns and she gave thoughtful responses which help me follow the best path to good health.
5.0
October 21, 2025
Great
5.0
October 21, 2025
Dr. Sisan is very professional and helpful on explaining and discussing all issues
5.0
October 21, 2025
Dr Sisan was extremely helpful, supportive and understanding - as usual. Thank you!
5.0
October 20, 2025
She’s knowledgeable, respectful and caring
5.0
October 20, 2025
She was completely understanding & thorough
5.0
October 18, 2025
Good bedside manner! Listened intently! Very thorough!
5.0
October 18, 2025
Dr. Moshtagh was great! She was professional, friendly, knowledgeable, caring, compassionate, yet personable! I don’t know that there’s anything more I could say about any doctor.
5.0
October 17, 2025
She was great.
5.0
October 17, 2025
Always great
5.0
October 14, 2025
Dr. Sisan is wonderful! She listens to my needs, she thoroughly answers my questions, and provides all the support I need!
5.0
October 14, 2025
Talked to me. Informed me of my resalts and her thoughts on our next steps.
5.0
October 14, 2025
Her demeanor is exceptionally reassuring, and she fosters a comfortable dialogue. She consistently exhibits both courtesy and professionalism during our interactions.
5.0
October 14, 2025
Professional and friendly. Shows great concern for her patients
5.0
October 13, 2025
Excellent physician!
5.0
October 12, 2025
I got there very close to closing and she was patient and got me through xrays. She was able to diagnose my situation completely in a way that I felt comfortable with the diagnosis. And she gave me additional suggestions about my upcoming total mastectomy which was very useful. She is a great representative for UCLA.
5.0
October 11, 2025
Very kind, informative, knowledgeable, and attentive.
5.0
October 7, 2025
I just want to thank Dr Sison for her care.
5.0
October 6, 2025
Dr. Sisan is a very kind and empathetic doctor who makes patients and their families feel at ease. She tries to think outside of the box and makes you feel like the most important person while you’re in the room with her. We feel so lucky to have found her!
5.0
September 24, 2025
Very informative, answered my questions, and took time with me.
5.0
September 24, 2025
Very efficient
5.0
September 24, 2025
My visit was very pleasant. Dr. Sisan is very knowledgeable. Listened to my issues and concerns. Addressed all my questions. Made a professional recommendations and made referrals. Filled my prescriptions she suggested and sent it to my Pharmacy. She spent considerable amount of time.
5.0
September 23, 2025
Dr. Sisan was incredibly personable and made me feel at ease right away. She took the time to listen carefully to my concerns and answered my questions thoroughly. I appreciated her approach and clear explanations along with helpful suggestions. I left the appointment feeling heard, understood and well cared for.
5.0
September 19, 2025
well.
5.0
September 17, 2025
Outstanding! Dr Sisan was patient, caring, friendly, extremely knowledgeable and helpful. Resolved all my issues and remained committed in every way to helping me with my CPAP machine. The usual excellent UCLA service. many thanks!
5.0
September 15, 2025
Professional, friendly and excellent doctor
5.0
September 15, 2025
She was kind and very attentive
5.0
September 15, 2025
Very patient and knowledgeable!
5.0
September 15, 2025
She’s very understanding and caring about my health. I feel very comfortable speaking to her about my sleep needs. Was a great phone call.
5.0
September 15, 2025
Dr. Sisan is my sleep dr and today she solved numerous issues that I’ve had due to sleep apnea. I’ve had terrible back, neck and shoulder pain issues.
5.0
September 13, 2025
She was positive and calmed me down
5.0
September 12, 2025
She was focused on me and how I was doing with my CPAP machine.
5.0
September 9, 2025
Dr Sisan is great, very thorough and always with helpful and uplifting comments, helping me in my journey to a better health. Very knowledgeable and also kind and considerate. Best doctor I had in a long time.
5.0
September 9, 2025
Listened to me. Addressed my issues. Great work!
5.0
September 5, 2025
Great doctor. Very professional.
5.0
September 3, 2025
Front desk very polite Dr dry informative just a pleasure
5.0
September 2, 2025
Excellent visit.
5.0
September 2, 2025
Went very well
5.0
August 28, 2025
Dr addressed and provided me practical recommendations to cope with my situation.
5.0
August 27, 2025
Doctor was caring and provided honest feedback
5.0
August 26, 2025
Dr. Moshtagh looks at me when . Communicating with me, which builds my confidence in her as a Doctor. You have some that dont...
5.0
August 26, 2025
Very thorough and clear
5.0
August 26, 2025
The doctor is very conscientious, very knowledgeable and very personable. Really takes her time to fully assess the patient’s needs and prescribe appropriate treatment.
5.0
August 25, 2025
On time. Answered questions. Explained options.
5.0
August 25, 2025
Excellent job
5.0
August 25, 2025
Excellent
5.0
August 25, 2025
Everything was good
5.0
August 25, 2025
Dr. Sissan is very sharp & kind.
5.0
August 25, 2025
My doctor is treating me for sleep apnea. She listens and thoroughly answers questions abd concern. As usual my appointment with Dr. Sisan was above reproach.
5.0
August 22, 2025
Dr Sisan is amazing. Her insightfulness and broad, holistic approach has not only helped my sleep but strengthened me in many aspects of my life and health. I am so blessed by her and grateful.
5.0
August 16, 2025
Very helpful understanding the new machine that I will be getting. She also shows interest in my general health and we with my wife's as well. She makes her service personal.
5.0
August 15, 2025
Dr. Sisan is very knowledgeable, caring and up to date on the issues affecting sleep apnea. I feel very grateful she is my doctor.
5.0
August 13, 2025
Prompt excellent care
5.0
August 6, 2025
Excellent in every way. Dr Sisan is always helpful, supportive and re-assuring. She seems to anticipate patient concerns and address them both professionally and in a friendly and confidence-inspiring way. Her efficiency, professionalism and understanding make the visits a pleasure. Thank you. Usual outstanding UCLA service.
5.0
August 5, 2025
What an awesome doctor. Gave me the results in a clear, concise and professional manner….what a super amazing doctor. It’s always a pleasure seeing her and she had a great personality and great manners and she takes the time to listen and offer suggestions.
5.0
August 5, 2025
Very good. The DR is very friendly and takes the time to explain in detail.
5.0
August 1, 2025
Helpful check up
5.0
August 1, 2025
Very good
5.0
July 28, 2025
Knowledgeable Understandable Explanations of test findings, implications, and path forward. Never felt rushed
5.0
July 28, 2025
She was very knowledgeable as well as encouraging and thorough. She was answered all my questions.
5.0
July 28, 2025
Dr. Sisan is always very personable, professional, skilled, and thorough. Her treatments have certifiably improved my condition and health.
5.0
July 22, 2025
Always amazing to talk with.
5.0
July 21, 2025
Great service is always
5.0
July 21, 2025
Dr M has become a tremendous ally in my path to a better quality of life.
5.0
July 18, 2025
She was very helpful and knowledgeable and encouraging about my using the c pap machine
5.0
July 12, 2025
Professional and thorough.
5.0
July 9, 2025
Very professional, Dr. Sisan explained thoroughly what my sleep disorder is, does, and what the available treatments are. She answered my questions to my satsfaction. I'm lookimg forward to my next appointment with her.
5.0
July 8, 2025
A very knowledgeable doctor with lot compassion and empathy.
5.0
July 8, 2025
Dr. Sisan is very knowledgeable and thorough and explained everything to me perfectly. She has a wonderful personality and made me fell at ease.
5.0
July 7, 2025
Excellent
5.0
July 7, 2025
Dr Sisan is very nice and very pleasant. She explained and discussed the outcome of my sleep study. I like her.
5.0
July 2, 2025
She gave me good news about my recent test, and was very encouraging. So happy that appointments are not way behind
5.0
July 2, 2025
Dr Sisan gave me the best gift ever….the gift of sleep!! I struggled with lack of sleep for 10 years before I met Dr Sisan.
5.0
July 1, 2025
She explained what snoring does to the body etc in a nice way so that I understand how serious it can be if it’s not identified earlier.
5.0
June 30, 2025
As always, my doctor was very professional, attentive, and knowledgeable of my medical concerns.
5.0
June 30, 2025
Dr. Sisan was very thorough in her explanation and treatment plan. Also very friendly and warm. Appreciated the conversation with her.
5.0
June 27, 2025
Thank you for your help today.
5.0
June 24, 2025
Dr. Sisan answered all of my questions and was extremely supportive!
5.0
June 23, 2025
Everyone is always very efficient and very kind and you don’t have to wait
5.0
June 22, 2025
Pleasant informative
5.0
June 22, 2025
She listens to my issues and take her time to explore all possible solutions and approach to my best health care
5.0
June 21, 2025
She explained her treatment recommendations very clearly and I was pleased how well it made sense.
5.0
June 18, 2025
Excellent
5.0
June 18, 2025
Friendly, efficient office staff. The doctor was on time, thorough, answered my questions and was easy to communicate with. I was happy to be given summary paperwork for my file. The doctor was very positive and welcomed me back should future services be needed.
5.0
June 17, 2025
Listened. Found and took time to understand. Helpful and approachable Thank you!
5.0
June 17, 2025
Pleasant, knowledgeable, caring. Very good first impression!
5.0
June 17, 2025
Very good bedside manner. Informative.
5.0
June 12, 2025
Dr Sisan is clearly a doctor that cares. Good listener.
5.0
June 6, 2025
Caring and attentive
5.0
June 4, 2025
Personable and willing to hear my concerns.
5.0
June 4, 2025
Informative, pleasant and professional.
5.0
June 4, 2025
The visit was good. She took her time, listened to me and talked about the process. She was very kind. Dr. Sissan
5.0
June 3, 2025
She was super nice, laid back, explained everything to me & I didn't feel rushed at all
5.0
June 2, 2025
She was great. Listened, asked questions, took her time with me. She felt genuine with her concerns. Great experience.
5.0
June 2, 2025
Great appointment!!
5.0
June 1, 2025
Short wait. She was very sympathetic and informative.
5.0
June 1, 2025
My doctor today was efficient and professional. She answered my questions and suggested follow-up treatment.
5.0
May 31, 2025
Wonderful!!
5.0
May 31, 2025
She was an excellent doctor
5.0
May 30, 2025
Excellent Doctor explain issues clearly and thourly. In
5.0
May 28, 2025
The doctor was very knowledgeable regarding my condition, very engaged and very helpful and provided a good game plan for my future care
5.0
May 28, 2025
She was very professional, thorough and has great bedside manner. One of the best medical experiences I have had with UCLA
5.0
May 27, 2025
Dr. Sisan always reviews my progress, and provides useful information.
5.0
May 23, 2025
Dr Sison is a kind and caring dr she listened to me very carefully gave me advise how to handle my illness I am very very thankful to Dr Sison
5.0
May 23, 2025
Dr. Sisan is a wonderful, compassionate, and knowledgeable doctor! I appreciate her input and willingness to help me with sleep apnea.
5.0
May 21, 2025
great
5.0
May 20, 2025
She’s amazing
5.0
May 14, 2025
It was a zoom appointment and it went well.
5.0
May 13, 2025
Called in the morning and actually was able to get in on the same day. Was greeted upon arriving and taken into the room with in 5 minutes. Dr Sisan is always very nice and easy to talk to. She explains what she thinks the problem is and how she is going to treat it. We are so much happier with the UCLA doctors and prompt appointments.
5.0
May 13, 2025
Very positive discussion regarding my issues. Very helpful
5.0
May 13, 2025
I love this doctor. She is caring, and listens to all my concerns.
5.0
May 13, 2025
No issues , quick and pleasant
5.0
May 13, 2025
Kind, caring and focused on me being healthy.
5.0
May 8, 2025
Dr. Sisan is very pleasant and exceptionally good about explaining things. Her staff was also pleasant and friendly.
5.0
May 7, 2025
She was very interactive rather than directive. Relaxed style. Near the end of the session made sure we understood the salient points. All in all a positive experience
5.0
May 7, 2025
Thorough Answered all my wuestions
5.0
May 6, 2025
Dr Susan is wonderful. Very caring and listens!!
5.0
May 6, 2025
The doctor was punctual, informative, and impressive with her knowledge
5.0
May 5, 2025
Very concerned about the progress, vested interest in improving my condition and accompanying her referrals and discussing the outcome of the exams and the other specialists commentary
5.0
May 2, 2025
Doctor was patient with me, went through thorough questioning and is understanding. Made me feel welcomed!
5.0
May 2, 2025
Very professional, experienced, and appreciated! Thank you!
5.0
May 1, 2025
The doctor was very attentive, professional, and took the time to discuss my concerns.
5.0
April 30, 2025
She is great!
5.0
April 29, 2025
The office staff was very friendly and caring. Dr Sisan was very attentive and caring. She was engaging and answered my questions directly and concisely.
5.0
April 28, 2025
The doctor is extremely professional, knowledgeable, and personable
5.0
April 28, 2025
Dr. Sisan was very professional and friendly.
5.0
April 26, 2025
It was great. Very positive
5.0
April 25, 2025
Everything was excellent.
5.0
April 25, 2025
She was professional, thorough, knowledgeable, helpful, and a good listener.
5.0
April 25, 2025
Excelente Dra. Muy atenta a a mis necesidades. 💯 satisfecho con su atención
5.0
April 22, 2025
She was talking, asking and listening to me. It felt personal. Even through the computer.
5.0
April 22, 2025
Always so pleasant and professional
5.0
April 11, 2025
She showed me where a filter went in my machine. Thanks
5.0
April 8, 2025
I was on time and the doctor was on time.
5.0
April 7, 2025
She is very attentive and understanding. She makes patient feels comfortable.