Heather Cassell, MD

She truly cares about her patients, explains what's going on, and answers any questions. She takes her time and makes sure everyone is comfortable and understands. She is an AMAZING Dr.

We have been seeing Dr. Cassell for almost 15 years. She is amazing and attentive to our kids. She is very understanding of their anxiousness and never pressures them to do food challenges is they aren't ready. She speaks to the kids directly and not only to us, as parents. She's THE best.

She always takes her time with our daughter. Answers our questions, we never feel rushed.

During our time with Dr. Cassell you can tell it's not just a job. She has lots of pride and care working with children who have allergies and lung conditions. She also is very knowledgeable and takes her time on explaining information to the patient and patient family.

Dr Cassell is an amazing allergist. She is so kind and so understanding of my kiddo who has multiple allergies. She speaks to my daughter directly with eye contact and includes her in the whole visit. My daughter really likes that Dr Cassell speaks to her in words that she can understand. Dr Cassell has always found ways to make my daughter's visit personal (ie asking about my daughter's hobbies and school). Thank you Dr Cassell for making something so scary for my little kiddo, something so manageable for her.

Dr. C. is regarded as the leading pediatric allergist in Southern Arizona, which she thoroughly deserves. She is compassionate and provided comfort to my anxious daughter-in-law, a British citizen unfamiliar with the US healthcare system.

Dr. Cassell is very knowledgeable. We have seen her for years. She really pays attention to our needs and is thorough.

She is the most astute, compassionate and genuinely caring clinician I've ever had. I really trust her with my health.

We have been seeing Dr Cassell for years and she is always fantastic!

She and her assistant doctor were extremely kind, and took the time to carefully answer any questions I had. They explained details and next steps thoroughly and gave me multiple ways that I could reach out for assistance or answers if I were to have any questions.

Very attentive and caring. We live in Phoenix and will continue to keep appointments and commute to Dr. Cassell

She was very knowledge and up to date both her treatment and recommendations. She explained things to us and was patient.

Dr Heather Cassell is wonderful. Caring. Sensitive. Listens thoroughly. Asks us questions. And gives us information

Dr Heather Cassell is amazing! We love her! She always makes us feel at ease and takes the time to explain everything to us. She is very professional and she always makes us feel like she truly cares! Thank you!

Heather Cassell has been my children's allergist since my son was a toddler. She has been so caring and helpful to us, and she has gone above and beyond to help our family.

She was pleasant and personable but also made us feel right at home.

Dr. Cassell and her team are so knowledgeable and really take time with their patients to address all issues.

Caring. Compassionate. Knowledgeable. Listens to pt concerns.

Excellent Dr.

She is very thoughtful, thorough and well addressed my issues and concerns

I regularly recommend Dr. Cassell to friends. She is a knowledgeable and researched doctor who is invested in her patient's well-being. Hands down she is the best doctor our family has ever had and we greatly appreciate her help and support.

She is the best. An amazing doctor.

Dr. Heather Cassell is amazing with children. She is super patient and kind!

Dr. Cassell and her nurses are easily the best clinicians I've ever had! Dr. Cassell genuinely cares about me as a person and always makes me feel like my life and my health matter.

She's amazing!

Dr. Cassell is extremely patient and listens to her patients and their concerns or issues.

Dr. Cassell was very nice and thorough.

Professional, personable, knowledgeable, cared about my concerns and ensured my needs were met.

Dr. Cassell is amazing, she is knowledgeable, kind and caring

Dr. Cassle is extremely knowledgeable and helpful. Our son loves her as she's very personable and good with kids. We love that she is up to date on recent studies and research and is a leader in her field.

Friendly, listened, educated us. They spent 90 minutes with us.

She's a great doctor who listens and treats her patients with respect and care.

Dr. Cassell is a great Doctor.

She is a compassionate, clinically astute practitioner who genuinely cares about her patients.

She is nice, straight to the point, she doesn't waste any time, tells you what you need to know, and she inquired about our personal life a bit so I felt like she genuinely cared.

Heather listened to our concerns and offered advice on things we hadn't even thought to ask about.

Dr. Cassell is great and interacts great with my daughter. She uses terms that my daughter understands.

She was great.

Knowledgeable and made sure we left the appointment we all questions addressed.

She is very attentive and we love her.

She was friendly, knowledgeable, and never rushed us, but took her time helping explain everything to us and answering our questions.

She was friendly, kind and was very interactive with our child.

Amazing bedside manner. She provided us easy to understand education and made us feel very comfortable.

We love her! She is always thorough and friendly.

Dr. Cassell is amazing, thorough and compassionate.

Amazing bedside manner. Personable and patient.

She's an amazing doctor who knows me well and comes up with a plan that is interdisciplinary.

Very attentive and willing to take extra measures to ensure a comprehensive assessment was complete for my child.

Dr Cassell and her team were amazing! She listened to all my concerns about my son, performed all the necessary tests and sent in a referral to another specialist so he can get in quickly! I appreciate how thorough she was and her sincere desire to figure out whats going on with him.

Dr Cassel and staff are amazing. They take so much time to explain things and really understand our concerns. They have a knack to comfort my very anxious son who usually gets very scared at the doctors office. They just have the best bed side manner coupled with genuine expertise in their field. I wish every doctors office was like this.

The care we receive from Dr. Cassell is top notch. Her care for and understanding of our son as an individual is amazing.

Dr. Cassell rocks

Dr Cassell and Cate always take the time with my daughter. Also the lady at the front desk always greets us.

We love Dr. Heather Cassell!

Dr. Cassell and all the nurses and staff are exceptional!,!

We appreciate Dr. Cassell.

Dr Cassell was thoughtful and knowledgeable of my daughter's condition.

Dr. Cassell is wonderful

Dr. Cassell answered all of my questions thoroughly. She is incredibly kind and knowledgeable.

I have always been treated well and expeditiously by staff. Dr. Cassell is probably the best doctor I have ever seen in 60+ years. She is confident, friendly, extremely intelligent and not only does she know her stuff but her ability to diagnose is excellent. She is a brilliant Dr and obviously enjoys her job.

Great doctor, Dr Cassell and staff.

Dr Cassell is the best of the best. She has always engaged directly with my son (the patient) even when he was young. Her interactions and direct questions to him have played a major part in his confidence to speak up and self advocate. We adore her.

Dr.Cassell is amazing. She treats the whole patient and genuinely cares for their well-being.

Dr Cassell is amazing.

Dr. Cassell is fantastic! She has great information to share and always answers any and all questions.

Dr. Cassel and other doctors/nurses are fabulous!

She was helpful.