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

Dr. Reginald Brian Friesen, MD

Individual provider Internal Medicine Physician · NPI 1043642333

Dr. Reginald Brian Friesen, MD is an Internal Medicine Physician in Alta Loma, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2013
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

6280 Malvern Ave
Alta Loma, CA 91737-3738
Phone: (440) 522-0039
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A24994 (CA)

Record details

NPI number1043642333
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 8, 2013
Last updated in NPPESAugust 8, 2013