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Oldendorf Medical Services, Pllc

Internal Medicine Physician in Loudonville, NY · enumerated 2009 · authorized official Mark Oldendorf, MD/Owner.

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

National Provider Identifier

1518107069

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Registry record

Entity type Organization (Type 2)
Legal business name Oldendorf Medical Services, Pllc
Practice address 407 Albany Shaker Rd, Loudonville, NY, 12211
Phone (518) 435-1300
Fax (518) 435-1397
Enumeration date Feb 24, 2009
Last updated in NPPES Aug 8, 2019

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary
261QM1300X Multi-Specialty Clinic/Center Ambulatory Health Care Facilities Secondary

Authorized official

Name Mark Oldendorf
Title MD/Owner
Phone (518) 435-1300

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

Who is the authorized official for Oldendorf Medical Services, Pllc?
NPPES lists Mark Oldendorf (MD/Owner) as the authorized official for this organization.
What is the NPI number for Oldendorf Medical Services, Pllc?
The NPI for Oldendorf Medical Services, Pllc is 1518107069, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-08.