Top Allergists & Immunologists in Arizona, 2026
Published by Palm Beach County Medical Media Group · Last updated May 1, 2026
How this ranking was built: We applied PBCMMG's seven weighted criteria (board certification, years in active practice, disciplinary record, aggregate patient reviews, hospital affiliations, specialty training, peer recognition) to every allergy & immunology physician with active credentialing in Arizona. Sources: NPPES Registry, ABMS, state medical boards, aggregated public review data. Last reviewed May 2026.
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- #3Allergy & ImmunologyArizona, AZ21+ years in practice
Heather Cassell, MD, practices allergy & immunology in Arizona, AZ. NPI-verified active practice since 2005.
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- #8Allergy & ImmunologyArizona, AZ21+ years in practice
Richard Keightley, MD, practices allergy & immunology in Arizona, AZ. NPI-verified active practice since 2005.
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Spot a methodology error or want to challenge a ranking? info@pbcmmg.com. Substantiated corrections are dated and noted on this page.