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

Mark D Allison MD a Professional Corp

Organization Internal Medicine Physician · NPI 1962524538

Mark D Allison MD a Professional Corp is an Internal Medicine Physician in Riverside, California. Licensed in California. Registered with an NPI since 2007.

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

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Practice location Address checks out

4100 Central Ave #106
Riverside, CA 92506-2933
Phone: (951) 788-8332
Fax: (951) 788-6380
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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 C50568 (CA)

Record details

NPI number1962524538
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Allison — President · (951) 788-8332
NPI enumeratedApril 4, 2007
Last updated in NPPESJune 18, 2012
Mailing addressPo Box 1413, Riverside, CA 92502-1413

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