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Mary Gessner-Peterson Medical Group, Inc

Internal Medicine Physician in Alpine, CA · enumerated 2012 · authorized official Mary Gessner-Peterson, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1467709220

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Registry record

Entity type Organization (Type 2)
Legal business name Mary Gessner-Peterson Medical Group, Inc
Other name <Unavail>
Practice address 1730 Alpine Blvd Ste 205, Alpine, CA, 91901
Phone (619) 326-4445
Fax (619) 722-1721
Enumeration date Aug 11, 2012
Last updated in NPPES Sep 27, 2018

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A11744 (CA) Primary
261QP2300X Primary Care Clinic/Center Ambulatory Health Care Facilities Secondary

Authorized official

Name Mary Gessner-Peterson
Title Owner
Phone (215) 778-5011

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Mary Gessner-Peterson Medical Group, Inc?
Mary Gessner-Peterson Medical Group, Inc is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-27.