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Dwight Guan, MD
NPI 1184644676 · on the registry since 2006
Practice
- Address
- 999 San Bernardino Rd
Upland, CA 91786 - Phone
- (909) 985-2811
- Fax
- (818) 587-2493
- Organisation at this address
- Excel Pathology
Ythanh Nguyen M.D. Inc
Henry J Gonzalez M D Inc
Howard P. Charman, Md, Inc.
Sach Physician Billing TrustInferred from a shared address, not stated in the registry. - Clinicians at this address
- 109
Registry record
- Primary taxonomy
- Family Medicine Physician
207Q00000X
- Also registered as
- Emergency Medicine Physician
- Licence states on file
- CA
From the registry's licence fields, which are often incomplete.
- Sex
- Male
- Record last updated
- 2025-09-11
Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in California