Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Ezial Berger, MD

Individual provider Allergy Physician · NPI 1538260583

Dr. William Ezial Berger, MD is an Allergy Physician in Mission Viejo, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

27800 Medical Center Rd Ste 244
Mission Viejo, CA 92691-6410
Phone: (949) 364-2900
Fax: (949) 365-0117
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy Physician (primary) Taxonomy 207KA0200X · Licence C35918 (CA)

Record details

NPI number1538260583
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 25, 2006
Last updated in NPPESJuly 8, 2007

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