Casey Erelli, PA‑C
Physician Assistant
Casey Erelli, PA‑C, is a Physician Assistant with a strong background in emergency medicine and a deep passion for allergy and immunology. She is committed to patient‑centered care and enjoys helping patients understand and manage their allergic conditions with confidence and clarity.
Her calm, approachable style and clinical expertise reflect the Pioneer Valley Allergy mission — providing compassionate, evidence‑based care for every patient.
Education & Training
Casey earned her Bachelor’s Degree in Biology from UMass Amherst and her Master’s Degree in Physician Assistant Studies from Bay Path University.
She is BLS CPR certified and has extensive training in allergy testing, immunotherapy, and chronic disease management.
Casey began her medical career as an EMT in 2015, later serving as a field supervisor and CPR instructor. Before joining the field of allergy and immunology four years ago, she spent over three years at Cooley Dickinson Urgent Care, gaining valuable experience in acute and emergency care.
Her hands‑on experience includes skin testing, immunotherapy injections, desensitization therapies, biologic and IVIg administration, and allergen extract preparation — giving her a comprehensive understanding of both diagnostic and therapeutic processes in allergy care.
My Approach to Patient Care
Casey believes that the best care begins with listening. She takes time to understand her patients’ symptoms, concerns, and goals before developing a plan tailored to their unique needs.
Her approach combines medical precision with genuine empathy, ensuring patients feel informed, supported, and empowered throughout their care journey.
She values the opportunity to partner with individuals and families, helping them navigate their allergy treatment and achieve long‑term relief.
Clinical Focus & Expertise
Allergy testing for environmental, food, and drug allergens
Immunotherapy (allergy shots) for long‑term tolerance and symptom relief
Asthma management and education on inhaler technique and triggers
Skin testing and contact dermatitis evaluation
Biologic and desensitization therapies for chronic or complex allergic conditions
Care for patients of all ages across Western Massachusetts
Outside the Office
Outside of work, Casey enjoys golfing, skiing, DIY crafts, and relaxing at her family’s Lake Winnipesaukee home. She loves spending time with her husband Brett, their daughter Alessandra, and their pets — Benny, Leo, and Bella.
Her love for family and the outdoors mirrors the same warmth and energy she brings to her patients every day.
Schedule an Appointment with Casey Erelli, PA‑C
Whether you’re managing seasonal allergies, asthma, or chronic allergic conditions, Casey Erelli, PA‑C, and the Pioneer Valley Allergy team are here to help you find clarity, comfort, and lasting relief.
📞 Call (413) 628‑5187
📍 Current Location: 212 Southampton Road Unit B, Westfield, MA 01085