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

Dr. Stephen Yan Chun To, MD

Individual provider Diagnostic Radiology Physician · NPI 1932165263

Dr. Stephen Yan Chun To, MD is a Diagnostic Radiology in Pomona, California. Graduated from University of California, Geffen School of Medicine in 1991, 35 years ago. Practices with Pomona Valley Imaging Medical Group Inc, a 21-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
35
Trained at
University of California, Geffen School of Medicine
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

1798 N Garey Ave
Pomona, CA 91767-2918
Phone: (909) 865-9532
Fax: (909) 397-0194
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence G75106 (CA)

Record details

NPI number1932165263
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 25, 2006
Last updated in NPPESJune 12, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Also practisesINTERVENTIONAL RADIOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1991 (35 years in practice)
Group practice Pomona Valley Imaging Medical Group Inc — 21 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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