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

Dr. Michael Warren Nielsen, MD

Individual provider Emergency Medicine Physician · NPI 1255301370

Dr. Michael Warren Nielsen, MD is an Emergency Medicine Physician in San Diego, California. Practices as a sole proprietor. Licensed in California.

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

200 W Arbor Dr
San Diego, CA 92103-9001
Phone: (619) 543-6236
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A79412 (CA)

Record details

NPI number1255301370
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 23, 2006
Last updated in NPPESFebruary 4, 2010

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