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

Dr. Dennis W Nielson, MD

Individual provider Pediatrics Physician · NPI 1801850706

Dr. Dennis W Nielson, MD is a Pediatrics Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
Specialties on file
2
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

400 Parnassus Ave 2nd Fl
San Francisco, CA 94143-2202
Phone: (415) 353-2113
Fax: (415) 476-9278
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Specialties & licences

Pediatric Pulmonology Physician (primary) Taxonomy 2080P0214X · Licence G35081 (CA)
Pediatrics Physician Taxonomy 208000000X · Licence G35081 (CA)

Record details

NPI number1801850706
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 17, 2006
Last updated in NPPESJuly 13, 2026

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