Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Margaret Johnston

Emergency Medicine Physician in Fort Collins, CO · enumerated 2013.

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

National Provider Identifier

1073957288

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Registry record

Entity type Individual (Type 1)

Name Mary Margaret Johnston

Sex Female

Practice address 1024 S Lemay Ave, Fort Collins, CO, 80524

Phone (970) 495-7000

Fax (303) 306-7753

Enumeration date Apr 18, 2013

Last updated in NPPES Sep 21, 2018

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License DR0058358 (CO) Primary

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 the NPI number for Mary Johnston?

The National Provider Identifier (NPI) for Mary Johnston is 1073957288, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Johnston practice?

The practice location on file with NPPES is in Fort Collins, CO. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-21.