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

William Gustin, MD

Individual provider Hospitalist Physician · NPI 1457431504

William Gustin, MD is a Hospitalist Physician in San Juan Capistrano, 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

30230 Rancho Viejo Rd Ste 200
San Juan Capistrano, CA 92675-1557
Phone: (949) 443-4303
Fax: (949) 443-4033
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 000000A77418 (CA)

Record details

NPI number1457431504
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 16, 2006
Last updated in NPPESOctober 6, 2014

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