Now, you can Self-schedule your appointments! 

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.

About DeMera Allergy Asthma & Immunology Center

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.

Referring Doctors
Allergy Report

Pollen Allergy Report

Friday 05/07/21: Medium-High

Saturday 05/08/21: Medium-High

Sunday 05/09/21: Medium-High

Monday 05/10/21: Medium-High

Tuesday 05/11/21: Medium-High

Based on Pollen.com for the greater Fresno Area

Check Before you Burn and Air Quality
I have been a patient of Dr. Demera’s for 10+ years. He and his staff are very professional and courteous. Dr. Demera is very knowledgeable and will work hard to find the best treatment for you.
Kim Valdez
Kim Valdez
18:16 24 Mar 21
What a great place! Friendly staff and beautiful facility. Dr was amazing. On time and very thorough. One of the best sr visits I’ve ever had! Excellent job. Thanks guys!
freddi67200
freddi67200
17:15 18 Mar 21
I love everyone who works here. You can tell it’s a great working environment. Dr DeMera is not only a great doctor, but is funny and not intimidating when asking questions. My allergies are night and day from getting shots the last 4years. (I’m highly allergic to almost everything but food). I wholeheartedly recommend them for you or your children’s allergy needs.
Erin Redmond
Erin Redmond
23:41 07 Jun 19
DeMera Allergy, Asthma, and Immunology Center is by far the most professional, courteous, and caring office I’ve been to in the area. Wonderful care.
Linda Staicer
Linda Staicer
16:34 31 Mar 21
Dr. DeMera is pleasant and a brain when you need help with anything in his field and can usually know what you need even if it’s not in his field and knows who to refer you to. His ENT specialist Dr. Sherman is also a brain and amazing.The staff is always polite, organized, professional, and wonderful to work with. He also works in two locations, Fresno and Visalia making it easier for traveling to him from out of town.
Jill Sippel
Jill Sippel
17:50 09 Nov 17
Dr. Sherman, top level anywhere as far as I can tell, genial, highly expert and one of those people who are lucky enough to be deep into what they are doing to the point of fine artistry. His Dx/Rx made my problem of chronic ear infections after living in tropics markedly better with first visit, as well as taking time to explain processes involved with healing and the probable course of the illness. My highest recommendation.
Dr Alan
Dr Alan
01:35 07 Jun 19
Dr DeMera and staff are great. Excellent care very accommodating. Dr DeMera goes the extra mile to get to a diagnosis
Ron Rustigian
Ron Rustigian
18:22 31 Mar 21
Very professional staff and providers.
Mayra Enriquez
Mayra Enriquez
17:21 06 Apr 21
The staff is so friendly while being efficient. Dr.DeMera is easy to talk to and he takes the time to tell you what he's thinking in a way us non doctors understand.
Trish Olmstead
Trish Olmstead
02:28 23 Jan 16
Dr. Demera and Dr. Sherman are caring ❤ Dr's and really seem to take an interest in their patients. When you are dealing with an issue they follow up with you in a timely manner to see how new treatment is going and if not going well, they try out something new and continue to check back until they get it right.
Sarah Diaz
Sarah Diaz
17:02 18 Mar 21
Provider seen patient quickly. Staff is friendly.
Jennelle Trujillo
Jennelle Trujillo
16:45 12 Apr 21
My family and I have been coming here for years. Dr. DeMera spends as much time with me as I need, and is very caring and compassionate. I feel very well taken care of by Dr. DeMera and his staff.
Mari Harris
Mari Harris
17:09 22 Apr 21
Dr. Sherman is always attentive and responsive to questions. He is always informative and educational. He takes his time and never rushes the visit.
Anthony Yamamoto
Anthony Yamamoto
16:48 24 Mar 21
Scheduling was easy and on point, the office is super clean, office staff are extremely professional and polite. One of the best in Fresno.
Jose Anaya
Jose Anaya
00:43 27 Mar 19
Dr. Demera and his staff are excellent! Both my daughter and I see him and we would definitely recommend.
Sarah A
Sarah A
23:48 14 Jun 19
They have helped me more than any other place has. I used to have severe asthma and allergy symptoms but now I’m able to walk more and actually able to breathe through my nose. The staff is very kind and they pull you in quick.
Dalilah Rivas
Dalilah Rivas
15:57 22 Sep 20
Great staff!
Benjamin Clement
Benjamin Clement
16:48 31 Mar 21
Upbeat and friendly staff.
Z
Z
16:10 24 Mar 21
Dr Sherman is an amazing thorough Dr!! It is clear that he takes great care in his patients. Office Staff is kind and helpful as well! I wish I had found Dr Sherman years ago.
Corincia Perez
Corincia Perez
18:15 08 Mar 21
Dr. DeMera is caring, friendly, and knowledgeable. I trust him explicitly to take of my entire family!
Sheri Xavier
Sheri Xavier
16:34 25 Mar 21
Thank you for your support!
Joeanna Mendez
Joeanna Mendez
18:15 17 Mar 21
Very professional staff, no unnecessary waiting. The nurse is thorough and takes a keen interest in the health of her patients.
Cl Montgomery, Jr
Cl Montgomery, Jr
22:31 07 Apr 21
Great group of people to work with. Kathy is a little funny...Kathy if your reading this, GO GIANTS!!!
nathan mechikoff
nathan mechikoff
23:00 01 Jun 16
Wonderful staff and so knowledgeable. I am so thankful to them 💓
Dawn Zinger-Corley
Dawn Zinger-Corley
19:02 20 Apr 21
Cared about my Heath and how they could get better results for me!
Lisa Leone
Lisa Leone
05:39 11 May 21
I personally had seen Dr. Demera for years and plan to go back in a few months. Out of two options from Valley Children’s hospital for my sons asthma I didn’t even let them finish their recommendation. I cut them off and let them know I’d be taking my son to Dr. DeMera. I had received excellent care in the previous years and yesterday’s visit made me feel confident that my sons health is in the best care.
Sarah Hernandez
Sarah Hernandez
17:08 16 Mar 21
Great place and an awesome allergy doctor. Thank you for helping our family!!!
Dayla Patterson
Dayla Patterson
18:45 09 Mar 21
The office staff was friendly and efficient. To my surprise I was called to the back within 5 minutes, the doctor was in right after that. We went over my history. Tests were done, results were good. The doctor actually listened to my concerns and has requested other tests to be done.Overall experience was a good one for being a new patient.
Guadalupe Aguilar-Oftedal
Guadalupe Aguilar-Oftedal
17:00 18 Mar 21
Great staff..knowable caring doctors.
Tammie Hill-Moss
Tammie Hill-Moss
01:17 12 Mar 21
I found DeMera Allergy after my allergist retired. I have been so impressed with this office. Everyone is polite and professional. I have received top notch care since I found Dr. DeMera. I highly recommend this office.
Julie O'Keefe
Julie O'Keefe
17:43 30 Mar 21
All the nurses and staff are very nice and professional. The nurses that give my daughter allergy shots always talk to her and make sure she has a water to drink after her shots 😁 They are very welcoming as well. Dr DeMera is by far the best allergies my daughter had so far. He takes time to explain everything. Highly recommend this to anyone that needs a good allergist. Thank you all
pearla gates
pearla gates
22:13 20 Nov 19
I worked for Dr. DeMera for two years and he was honestly the best doctor I have ever worked for. Not only is he a great boss but he genuinely cares about every patient he sees. He will go above and beyond to get to the bottom of the problem and if he can’t figure it out he’ll refer you out to someone better specialized for your specific diagnosis. The staff is all warm and welcoming, and will try their hardest to make sure you have the best care possible. In my time at DeMera Allergy I was also seen as a patient for allergies, eosinophilic esophagitis and ear issues. I highly recommend seeing Dr. DeMera and Dr. Sherman; they are both amazing doctors with great passion for their specialties.
Kate Kramer
Kate Kramer
18:56 08 May 18
The staff is very friendly. And Dr.Demera is great. They get you in and they get you out. I would recommend them to anyone that I know. The office is very clean
Mark White
Mark White
03:27 10 Mar 21
My appointment time was on time so I didn’t have to wait which I appreciated. Everyone wascourteous and well mannered. It was a overallpositive experience.
Larry Joneson
Larry Joneson
18:10 17 Mar 21
Dr Demera is a caring doctor who is very personable. Takes his time with the patient to figure out what is going on. The staff has to be the best in the valley. Would highly recommend Dr Demera!!!
Donna Wright
Donna Wright
16:55 01 Feb 21
It was quick and efficient . Office staff are very friendly and kind. Dr. DeMera is also kind and helpful. He makes one feel cared for.
Cynthia Miller
Cynthia Miller
18:12 08 Mar 21