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Collin Martin Greer, MD

Emergency Medicine Physician in Olympia Fields, IL · enumerated 2021.

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

National Provider Identifier

1730763657

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Registry record

Entity type Individual (Type 1)
Name Collin Martin Greer
Credential MD
Sex Male
Practice address 20201 Crawford Ave, Olympia Fields, IL, 60461
Phone (708) 747-4000
Enumeration date May 6, 2021
Last updated in NPPES Jul 26, 2024

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 036171199 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Where does Collin Greer practice?
The practice location on file with NPPES is in Olympia Fields, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Collin Greer?
The National Provider Identifier (NPI) for Collin Greer is 1730763657, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-26.