Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mary Macgregor, D.O.

Infectious Disease Physician in Morton Grove, IL · enumerated 2007.

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

National Provider Identifier

1851571426

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Registry record

Entity type Individual (Type 1)

Name Mary Macgregor

Credential D.O.

Sex Female

Practice address Morton Grove, IL, 60053

Phone (847) 663-1566

Enumeration date Nov 12, 2007

Last updated in NPPES Feb 12, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 036-063587 (IL) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mary Macgregor?

The National Provider Identifier (NPI) for Mary Macgregor is 1851571426, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Macgregor practice?

The practice location on file with NPPES is in Morton Grove, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

George Brodsky Hospitalist Physician · Morton Grove, IL NPI 1417928714 North Suburban Pulmonary & Critical Care Consultants, S.C. Critical Care Medicine (Internal Medicine) Physician · Morton Grove, IL NPI 1083681431 Travel Medicine Source Ltd Infectious Disease Physician · Morton Grove, IL NPI 1962571737 Advanced Primary Care, Sc Family Medicine Physician · Morton Grove, IL NPI 1699958207 Christy Gernhofer Nurse Practitioner · Morton Grove, IL NPI 1679904403 Donna Rathunde Respiratory/Developmental/Rehabilitative Specialist/Technologist · Morton Grove, IL NPI 1467811927

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-12.