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

Brian L Nielsen, DO

Individual provider Internal Medicine Physician · NPI 1710143573

Brian L Nielsen, DO is an Internal Medicine Physician in Colton, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

400 N Pepper Ave
Colton, CA 92324-1801
Phone: (909) 580-1000
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 20A10451 (CA)

Record details

NPI number1710143573
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 31, 2008
Last updated in NPPESDecember 1, 2021

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