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

Dr. Gregory Michael Nicholson, MD

Individual provider Psychiatry Physician · NPI 1851489868

Dr. Gregory Michael Nicholson, MD is a Psychiatry Physician in Norwalk, California. Licensed in California. Registered with an NPI since 2006.

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

11401 Bloomfield Ave
Norwalk, CA 90650-2015
Phone: (562) 863-7011
Fax: (562) 864-4560
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A86080 (CA)

Record details

NPI number1851489868
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2006
Last updated in NPPESJuly 8, 2007
Mailing address1600 9th St, Sacramento, CA 95814-6404

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