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

Mark Greenstadt, MD, Inc

Organization Internal Medicine Physician · NPI 1770635120

Mark Greenstadt, MD, Inc is an Internal Medicine Physician in Northridge, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

18350 Roscoe Blvd Ste 300
Northridge, CA 91325-4109
Phone: (818) 717-3021
Fax: (818) 717-3028
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G35141 (CA)

Record details

NPI number1770635120
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Greenstadt — President · (818) 717-3021
NPI enumeratedJanuary 17, 2007
Last updated in NPPESAugust 22, 2020
Mailing address18350 Roscoe Blvd, Suite 300, Northridge, CA 91325-4109

Other providers in Northridge