In our continuing effort to better service you, DeMera Allergy is pleased to share a new service for our new and established patients. We know your lives are busy, and your time is valuable. Now, you can self-schedule your appointments with us at your convenience from your preferred device.
The DeMera Allergy Asthma & Immunology Center is committed to providing thorough, individualized care to every patient. Unlike other centers, we won’t simply continue prescribing you medications until we find one that works. We’ll take the time to diagnose you correctly, finding the root of your problem and treating it in the most effective way possible.
The specialists and staff at DeMera Allergy Asthma & Immunology Center pride themselves on providing the best care possible. When you call our offices, we’ll schedule your appointments without delay and answer your questions promptly.
Asthma and allergies affect thousands of people in the Fresno and Visalia areas. If you’re one of them, it’s time to stop suffering and start breathing clearly once again. Contact us today to schedule an appointment.
Please click here for a downloadable referral form.
Fax form to: (559) 431-0301.
Fax form to: (559) 431-0301.
Pollen Allergy Report
Monday 2/14/22:Medium
Tuesday 2/15/22: Low-Medium
Wednesday 2/16/22: Low-Medium
Thursday 2/17/22: Low-Medium
Friday 2/18/22: Low-Medium
Saturday 2/19/22:Low-Medium
Sunday 2/20/22: Low-Medium
Based on Pollen.com for the greater Fresno Area
Daily Air Quality Forecast
Check Before You Burn contact number:
Monday 2/14/22: Moderate
Tuesday 2/15/22: Moderate
Wednesday 2/16/22: Moderate
Based on Valleyair.org for the greater Fresno Area
Dr. Demera is nothing short of an Angel on Earth!I can’t say enough about him, and how grateful I am for his help recently. I was literally at the end of my rope, after 6 weeks of excruciating ear pain, with many medical people prescribing the wrong medications and shrugging me off. Dr. Demara went above and beyond to get me the help I needed. We need more physicians that truly care about helping people. This one does! That’s for sure.
Kristi Ferrucci
17:43 07 Apr 22
Quick and pleasant appointment. Dr. DeMera always expresses interest and concern for your allergy situation. Important in this valley!
Kathy Atkins
16:42 13 May 22
I'm always impressed and thankful I found them.
Jason Thomas
16:55 12 Nov 21
Professional staff that treats patients with dignity and worth!
Vanessa Lee
17:15 24 Nov 21
Love the kindness at the front desk. And Jennifer is very Calm when talking and explaining my results. Thanks again Manuel
Manuel Alves
17:13 04 Feb 22
There number 1 in my book just Awesome. Allergies are under control I don't spend the day at the doctors office. Prompt Through and Quick and back to my day.
Floyd Walls
16:16 09 Jun 22
Was seen right away. Dr Demera And staff are very nice and professional.
Gayle Angle
17:27 11 Feb 22
Everyone at DeMera Allergy is professional and friendly. I never have to wait any more than a few minutes.
Regina Parker
23:12 28 Jan 22
Love Dr. Demera! He always reassures me that everything is going to be ok and I can call and get ahold of him with any kind of emergency!
Kristin Le Fore
19:26 20 Jan 22
Dana & Dr. Sherman are wonderful! I called in with concerns about a nasalplasty that I had with another Dr. and no one else would help me. She told me the Dr. was not taking new patients but really wanted to help me. She said she would call me back the next week. I thought. Ya right. Just like the others said but she did call back and got me in to see the Dr. two days later. He confirmed what I had suspected with my nose and is getting me set up to see a Dr. at UC Davis to fix the problems. I am so grateful!!!
Christy Sasser
17:18 13 Aug 21
Dr DEMERA and his staff are amazing! I have had a chronic condition of what I thought was allergies, after being tested it was exactly what Dr DEMERA thought it was. There was no long waiting..... within two days they had my results from the time of walking his office! That is almost unheard of these days! Thankful to him and his staff!
connie ST ANGELO
17:15 11 Mar 22
The staff there is very friendly and they take very good care of me there and I’m happy they are there for me.
Denise Carrillo
16:20 17 May 22
Wonderful as always! Always on time, very thorough and pleasant.
Lindsey Bills
05:01 10 Jan 22
Phone appointment with Dr. DeMera. Great idea! I miss the in-person connection but it was great to save time and energy arranging transportation, getting to appt, sitting & waiting! It was great sitting at home, getting things done, and doing my waiting there and Dr. D could call when he was ready for me instead of rushing around!Updated 12/1/21 - still the best! Office staff is very efficient and helpful! Dr. D friendly, professional and very thorough! I never feel rushed and get all my questions and concerns addressed!
Judi Sommarstrom
04:55 02 Dec 21
I had a very pleasant experience. Great staff and atmosphere. Dr. DeMera is extremely knowledgeable. He knew exactly what was going on with me. He was very thorough in explaining my diagnosis. I left his office feeling assured and relieved. Dr. DeMera is a physician you must see.
Jeannie Nolte
16:21 20 Apr 22
I couldn’t make my appointment because I had back surgery, so I canceled it the day before. The doctor called me the next morning and asked if I wanted to do a Telephone visit. I thought that was awesome of the doctor to go out of her way to keep my appointment because I really need to see her but I couldn’t
Ken Hance
17:20 27 Jan 22
Very friendly staff front and back. Excellent experience with doctor.
Barbara Sanchez
16:10 18 Mar 22
really friendly staff and kinda awesome that they are having a pumpkin contest for their staff for halloween, you can tell they really put the effort in on that and its nice to see places that care about their employees too, because happy employees take better care of patients.
Heather Gill
18:13 21 Oct 21
The team at DeMera Allergy Asthma are so nice and extremely organized. Dr. DeMera has a really neat personality and puts his patients at ease.
Patricia Wilkinson
01:31 02 Mar 22
My husband and I both receive evaluation and treatment by doctors here. We receive diagnostic and treatment care for allergy, esophagus health, inner ear, and sleep apnea. Doctors are skillful and personable, straight forward with explanations. Drs DeMera and Sherman are very knowledgable and real problem solvers. They have really helped us to regain control of health matters and helped us enjoy our lives more.
KA Millison
06:45 20 Nov 21
We’re very lucky that Dr DeMera and his staff drive to Visalia from Fresno once a week to treat patients. I would drive to Fresno to see him any day. I’ve been to several doctors over the years with sinus problems. Dr DeMera was the first doctor that talked to me about my past and ran tests instead of just giving me an antibiotic and rush me out the door. His office staff was great also. Very professional and friendly.
Rhonda Junio
17:32 29 Dec 21
Great experience for my first time visit to Dr. Demera's office. I felt very welcomed and very well cared for by the doctor and his staff.
Kelly Swertfager
16:24 12 May 22
Staff was amazing! Very friendly, knowledgeable, and professional. Very happy i was referred here.
Damien Stewart
04:43 23 Jan 22
Quick yet thorough. I highly recommend this Dr. DeMera and those that work with him. Nice atmosphere and try to get you in quickly when the need arises.
Julie Duwe
16:15 21 Oct 21
The office is impeccable. The staff is friendly, welcoming, and efficient. Dr Demera knew what my diagnosis was, before the test results even came back. He was also personable. I highly recommend, for all of these reasons!
Sarah Chun
16:33 05 May 22
Amazing! Super knowledgeable, explains everything (which I fully appreciate as a nurse, bc not only do I want to know my diagnosis, I also want to learn about it) and He listens to the patients concerns. The office is super friendly, too! I’m so happy I found Dr.Demera! Highly recommend!!
Tara Cucullu
02:07 21 Nov 21
they were on time for patients.
Peter Berndt
01:20 19 Sep 21
They are the very best at their specialties!
Michael Keitz
19:11 07 Sep 21
I have been a patient of Dr. Demera for a few years and recently had the good fortune to become one of Dr. Sherman’s patients as well. Both doctors are competent, professional and personable. I have never been made to feel as if my questions are an imposition (I ask a LOT of questions), and I always get honest answers that make sense. Dr. Sherman is enthusiastic, obviously loves the work he does and cares about his patients as people, not dollars orminutes in an hour.
Mallory Moad
16:47 06 May 22
Dr DeMera and staff are great. Excellent care very accommodating. Dr DeMera goes the extra mile to get to a diagnosis
Ron Rustigian
17:55 11 May 22
Very friendly staff and professional
Patricia Lopez
21:07 29 Dec 21
Staff is very efficient, helpful and have smiles when greeting you! My appointment was scheduled for 900am and I was in a room about 910am!Thank you, Dr Demeara and staff!
Mike Kubeck
16:38 30 Jun 22
Always have a pleasant visit. Quick and friendly.
Jose Prieto
21:13 10 Mar 22
Absolutely loving working with this office and Dr Demera. He is intelligent, thoughtful and willing to go the extra mile for his patients. He takes the time to clearly explain all aspects and actively listens to feedback from his patients to make an action plan together. Exceptional service rarely found locally and is on par with high level University patient care.
Kendra Thacker
18:47 18 Oct 21
Dr. Demera and his staff are excellent! Both my daughter and I see him and we would definitely recommend. Dr. Demera takes the time to listen to your concerns, he is available when there is an urgent issue, and he genuinely cares about finding a resolution for your allergy needs.
Sarah A
16:19 20 Sep 21
Dr Demerara was very understanding of my concern and gave a very good explanation of cause and treatment plan.
James Hiney
17:39 03 Feb 22
Very professional and excellent service.
Torigian Law
18:43 02 Nov 21
First time at this facility and was impressed. All the staff were very professional and welcoming. The checkin and checkout process was quick and easy. The FNP that I saw was very thorough and had a great bedside manner. Glad my MD referred me here!
Denise Glessner
18:01 30 Sep 21
I was in and out less than 40 minutes. I had a scope for my LPR. Jessica was very professional and knowledgeable. She listened to my concerns and I did not feel rushed. I highly recommend.
Kimberly Merchen
16:47 27 Jun 22
Dr. Sherman is the best! Well versed on a great variety of issues, fun to talk to, and very professional.
Paul Nibur
20:54 20 Sep 21
Had a 2:00pm followup with Jennifer. Received a reminder the day before and was asked to be there 15 minutes early. Jennifer did a great job answering my questions and going over my status. I was out the door by 2:10pm. Great job DeMera!
Douglas Hunter
15:19 23 Dec 21
Dr. Sherman is AMAZING!!
Anahi Delacruz
17:48 27 Aug 21
Very friendly staff that truly made our visit a positive experience.
Amie Wilson
17:20 03 Dec 21
Outstanding Facility. Dr. Demera and his staff are wonderful. Very professional… I highly recommend to all A++
Debbie Zaura
15:44 15 Sep 21
Jessica was great and very informative regarding my case!!!!!
john GORSKY
17:33 18 Aug 21
I love my doctor she has so far found different things that are wrong with me I I’m glad that I found her so far things have gone good I would recommend them
mary tello
17:14 02 Mar 22
I usually see Jessica when I have an appointment. She always enters the room with a big bright smile and is so enthusiastic. I didn’t have to wait in the lobby very long which is always appreciated. She answers my questions and is always eager to hear my opinion of her advice on what to try next for what I’m there to see her for. I go to Dr. DeMera for allergies and Dr. Sherman for Sleep apnea and see Jessica for all my appointments.
Lynette Kennedy
00:19 09 Jun 22
Dr. DeMera was very kind. He quickly realized that my particular problem could be better handled by another doctor. Dr. DeMera made sure my referral was handled very quickly. Have never had such a quick response ever.👍
Margaret Price
19:20 02 Jun 22
Dr.Rush is amazing! Very thorough, professional, kind, considerate and caring. Throughout my journey of health I have seen several doctors in different departments and Dr. Rush has been one of the best. She takes time with you and talks to you not at you . It’s greatly appreciated and she is a breathe of fresh air. Can’t say enough and would highly recommend! Thank you for the opportunity to be able to share my experience.
Cynthia Erickson
18:58 23 Sep 21
Dr. DeMera is so good with my 7-year old son. He has been our allergist since my son was about 15 months old. The staff is great, and I'm happy to say, we rarely have a very long wait to see the doctor at our appointments.
Kelley Kim
17:59 30 Oct 21
Great experience! Ms Jessica was so nice and eager to help me reach a resolution to my allergies. She explained the test I took well! She also ordered tests that had never been ordered before in attempt to get to the bottom of my allergies. I feel I'm in great care!
Elaine Alvarez
16:13 07 Apr 22
The staff and Dr. De Mera were professional and attentive.
Merv Barcellos
17:28 03 Mar 22
Loves to teach you about your condition and is an expert among experts
Sam T
17:09 10 Nov 21
Always have a positive and great visit with Demera Allergy. The staff is always courteous and helpful. Always happy to recommend Demera Allergy to friends and family!
Rachel Devoll
16:12 12 Apr 22
From the front desk through the exam and on to the follow up with referrals , tests, and prescriptions the staff at DeMera is ultra professional, personable, and caring. I am reluctant to post this just because I want to keep these people to myself and not have them overwhelmed. But my experience with Jessica and Jennifer as nurse practitioners is that they are very knowledgeable and thorough. They don’t just look at everything as an allergy, and seem to take a broader approach considering what other body functions might be coming into play. I trust them to find out what’s going on with me and my family more than I trust my general practitioner! Imagine that. As far as I am concerned, they are among the best doctors in Fresno.
Mike Griffin
18:19 07 Sep 21
When my wife and I tested positive for COVID-19, we called Dr DeMera office right away and had a video appointment the same day. Dr DeMera checked on us and prescribed us medication to get us back to recovery. I am glad to have Dr DeMera as our family doctor!
Paul Grady
17:16 03 Jan 22
Friendly office staff!! Office cleanliness is super clean!
Bill Whelan
17:33 06 Jan 22
Friendly staff and knowledgeable Doctors. Dr Ruch is fantastic!
kris kachadoorian
17:53 21 Dec 21
The Nurse Practitioner was very thorough and was an excellent listener. She explained everything very clearly in terms of what’s going on and what I could expect for next steps. She and all the staff were very friendly and provided excellent care.
Trish Small
17:16 23 Feb 22
Jennifer is the best, polite, calm & funny.
Cindy Farris
17:46 04 Jan 22
This is a great office. The staff are very helpful and the treatment is first rate. My friend needed to go to another appointment and come back to pick me up, and the staff made me welcome in the waiting room until she returned for me. Dr. Sherman is a wonderful Doctor. He cheerfully answers questions and I always learn something when I see him.
Sandra Willey
17:43 30 Jun 22
Everyone is so pleasant and patient. The Dr was very patient and asked questions that no other had before.😊
Rosa Lopez
16:38 31 Mar 22
Dr. Demera is connected, brilliant, and caring. He listens, which is first and foremost in any patient care. Jessica, his NP/PA is the same. What a team. The staff is also receptive, kind, and willing to share a laugh or two. Very grateful for this place. ~ R. Reilly
Crazy Lady
17:55 04 Nov 21
Professional and a very personable experience. I HIGHLY recommend DeMera Allergy!
Michael Crowley
17:10 18 Feb 22
It was wonderful. Staff is always kind and efficient.
Carolina Gustafson
21:27 08 Apr 22
I have dealt with chronic coughing for 16 months. Dr Demera is searching for the cause, not just throwing antibiotics and prednisone at it. I appreciate him taking it seriously.I enjoy walking in to office and hearing the staff enjoying each other.My appointments are always on also.I highly recommend Dr. Demera and his staff.
Mary Enos
17:57 03 Dec 21
Staff is professional and knowledgeable. We’ve been under the care of Dr. DeMera for 15 years and consistently received high quality care in the office, via telephone and referring offices. Dr. DeMera is an expert in his field and has a vast network of collaborating physician experts who have helped meet our health needs.
Mao HerFlores
19:44 28 Dec 21
Dr. Halstead and the rest of the team at DeMera Allergy have always offered top-notch service and care for me. Injections are speedy and the doctor takes time to get to know me as a patient. I highly recommend their knowledgeable staff for your allergy needs!
Captain Maberu
17:32 05 Jan 22
Dr. DeMera showed concern, was focused on issue and I was happy with the outcome. Very professional.
Paul Ringel
16:18 19 May 22
Great staff and very professional!
Dennis House
02:20 20 May 22
I love how the nurse practitioner listens to my concerns and always explains everything in detail. I highly recommend Demera for all your allergy needs.
Lupe Heng
20:15 15 Sep 21
