Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Michael Chai MD Inc

Organization Internal Medicine Physician · NPI 1568572949

Michael Chai MD Inc provides Internal Medicine Physician services in Upland, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

490 N Mountain Ave Ste B
Upland, CA 91786-5188
Phone: (909) 920-6698
Fax: (909) 931-7192
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G079965 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A78092 (CA)

Record details

NPI number1568572949
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Michael Chai — Ceo · (909) 920-6672
NPI enumeratedAugust 30, 2006
Last updated in NPPESSeptember 19, 2026
Certification dateSeptember 19, 2026
Mailing address490 N Mountain Ave, Upland, CA 91786-5187

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