Flower Mound & Denton



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About Family Allergy & Asthma Care

Caring for you just like we care for our own family.

We’ve brought peace of mind to families for over 25 years. Our friendly, caring team helps both adults and kids find relief from stressful food allergies, bothersome environmental allergies, and debilitating asthma. Being moms and caring for our own families has given us a deeper understanding of how to care for you and your family. We understand the need for early morning and evening clinic hours, educational resources, a listening ear, and a caring heart. As board-certified allergists we have completed the highest level of training in allergies, asthma, and immunology which allows us to offer you expert care. We’re your devoted partners in solving your healthcare needs.


Fellowship-trained, board-certified allergists. And, we’re also moms.

Mary Hudelson, MD – DABAI, Director

“I founded and remain enthusiastic about the work we do at the Food Allergy Institute of North Texas because of the life-changing impact it has on our patients. I want to be as helpful as I can for each patient’s special circumstance. Sometimes that leads to less medicine and making smarter choices about treatment; but, it’s always about peace of mind no matter the patient’s place in life.”

Diplomate:  American Board of Allergy & Immunology Fellowship:  Allergy and Immunology, University of Texas, 1993 Residency:  Internal Medicine, Presbyterian Hospital of Dallas    Dallas, TX   1987-1990 Medical School: Texas Tech University; 1987 Undergraduate: Biology, Texas Christian University, 1982   Dr. Hudelson also served in the United States Army Reserves as a medical officer and was active during Operation Desert Storm.
Fellow: American College of Allergy Asthma and Immunology American Academy of Allergy, Asthma and Immunology On Staff: Presbyterian Hospital of Flower Mound, 2012–present; Presbyterian Hospital of Denton, 2014–present; Medical City Lewisville, TX, 1993–present; Medical City Denton, 2014-present; Baylor Medical Center of Grapevine, 2014–present; Baylor Medical Center of Carrollton, 2014–present Chief of Staff: Medical Center of Lewisville, 2003 Assistant Professor: Internal Medicine, Division of Allergy, Asthma and Immunology, University of Texas Southwestern Medical School,  Dallas, TX, 1995-present Member: American Medical Association; Texas Medical Association Texas Allergy Asthma and Immunology Society Denton County Medical Society Joint Council of Allergy, Asthma and Immunology

Marie Fitzgerald, MD – DABAI, North Texas Pollen Station Director

“One of my children has a food allergy and so I understand these challenges firsthand. I live with it day-to-day and I didn’t just learn about it in a textbook. It fundamentally changes so much for families including sleepovers, parties, and school. We want to partner with our patients so they not only receive treatment like desensitization and immunotherapy, but also education and guidance on lifestyle changes.”
Diplomate:  American Board of Allergy & Immunology 1995- Present Fellowship:  University Of Texas Southwestern Department of Allergy, Asthma and Immunology, Dallas, TX  1993-1995 Residency:  Barnes-Jewish Hospital Department of Internal Medicine St. Louis, MO 1989-1992 Medical School:  McGovern Medical School formally known as UT Medical School at Houston Dean’s Competitive Academic Scholarship 4 years Houston, TX 1985-1984 Undergraduate: Baylor University BS in Biology  1980-1984
Fellow: American College of Allergy, Asthma and Immunology American Academy of Allergy, Asthma and Immunology Member: American Medical Association Denton County Medical Association Texas Medical Association Texas Allergy and Immunology Society On Staff: Medical City Lewisiville, 1997-present Presbyterian Hospital of Denton, 2014-present; Baylor Medical Center of Grapevine, TX, 2014-present; Baylor Medical Center of Carrollton, 2014-present Associate Professor:   Internal Medicine, Division of Allergy, Asthma and Immunology, University of Texas Southwestern Medical School, Dallas, 1995- present Publications:  M.H. Holman, et al., “Immunologic Characterization of Allergic Bipolairs (Fungal) Sinusitis,” Journal of American College of Immunology (1995)


“I am passionate about helping people be set free from the limitations caused by allergies and asthma. Having suffered with allergies since childhood I have experienced firsthand the positive difference allergy treatment can bring. My favorite thing is to take care of a child who has been socially impacted by their food allergies. I love it when they can experience the freedom to attend birthday parties, eat lunch with others at school or go to outings with friends. Empathizing with a parent whose child has food allergies is especially meaningful to me as I am also the parent of 2 children with food allergies. It can feel scary and overwhelming for parents to navigate the complexities of having a child with a life-threatening food allergy. My goal is to walk this journey alongside parents and their food allergic child to help them alleviate their fears and meet their goals. Educating and partnering in this way is truly my passion.”
Fellowship:  Wayne State Medical School: Detroit Medical Center Followship in Allergy Immunology, 2006-2008 Residency:  Wayne State Medical School: Detroit Medical Center Residency in Pediatrics, 2003-2006 Medical School:  Michigan State University: College of Human Medicine, 2003 BS: University of Michigan: Ann Arbor B.S. in Biology, 1999
Certification: ABAI Certified, ABP Certified On Staff: Las Colinas Medical Center, 2010 – Present Publications: Mireku, NM, Yun W, Ager J, Baptist A. Changes in Weather and the effects of pediatric Asthma Exacerbations. Annals Allergy Asthma Immunology 2009


Compassionately caring for your family.

Angelica Ybanez, Board Certified, PA-C

“For our oral immunotherapy patients, their “graduation” dose comes with exciting changes in their lives because they are desensitized to their allergy. For kids, we put on a big celebration complete with balloons and a certificate. All of their family is invited and they get to eat special food they’ve really wanted to have for so long.”
BS: Physician Assistant Studies, University of Texas Southwestern Medical Center, Dallas, TX 2000 AS: Biology, College of the Mainland, Texas City, TX 1996 License & Certifications: National Commission of Certification of Physician Assistants, 2001 National Commission of Certification of Physician Assistants, Recertification, 2007 Texas State Board of PA Examiners, 2001-present
Professional Organizations: American Academy of Physicians Assistants, Texas Academy of Physicians Assistants

Emily Williams, Board Certified, PA-C

“The fear and danger associated with a food allergy is real. It is not only a life-threatening physical issue, but an overwhelmingly emotional one, too. Finding relief is freeing for the entire family because they can have confidence and peace of mind, worrying less in uncontrolled situations.”
BS: Physician Assistant Studies, University of Texas Southwestern Medical Center, Dallas 1999 BS: Health, Texas A&M University, College Station, TX, 1996 AA: Blinn College, Brenham, TX 1993
License & Certifications: National Commission of Certification of Physician Assistants, Texas State Board of PA Examiners 2018; DEA/DPS License; Basic Cardiac Life Support (BLS) Certified; Certified Diabetic Educator by the National Board for Diabetic Educators

Courtney Mccune, Board Certified, PA-C

I have had lifelong problems with allergies and know first-hand the affect allergies can have on people’s lives, from young children to adults. Treating allergic diseases such as asthma, allergies, urticaria, and eczema the past several years has been incredibly rewarding. I am passionate about patient education, health and wellness and enjoy giving practical tips that can help enhance patient’s health.
BS: Physician Assistant Studies, Lincoln Memorial University, Harrogate, TN, 2017 BS: Bachelor of Science, Biology, Friends University, Wichita, KS, 2013 License &Certifications: American Heart Association BLS for Healthcare Provider, 2016; American Heart Association ACLS, 2016; American Heart Association PALS, 2016; NCCPA, 2017; Texas Medical License, 2017; Rhinoscopy certification, 2018
Professional Organizations: American Academy of Physician Assistants (AAPA), 2015; American College of Allergy, Asthma, and Immunology, 2018; Association of Physician Assistants in Allergy, Asthma and Immunology, 2018