Margaret Mary Grossmayer , APRN, FNP-C
Nurse Practitioner • Willowbrook, IL
Professional Overview & Biography Verified Profile Summary
Margaret Grossmayer, APRN, FNP-C is a certified Nurse Practitioner practicing in Willowbrook, IL. With approximately 1 years of clinical experience since completing medical education in 2025, Margaret Grossmayer delivers high-quality medical care to the local community at 40 75TH ST.
Margaret Grossmayer is affiliated with Midwest Express Care 2, Inc and accepts Medicare assignment.
Practice Location & Contact Primary Location
40 75th St
Willowbrook, IL 605272325
Medicare Profile & Education
Other
2025
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Nurse Practitioner in Willowbrook, IL
Practicing in Willowbrook, IL (4929 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Medical Specialties & State Licenses
CMS Verified: 2025-11-26NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Hospital & Practice Group Affiliations
Midwest Express Care 2, Inc
40 75th St, Willowbrook, IL 605272325
Phone: 6305815372
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Nurse Practitioner - Family
Nurse Practitioner
Nurse Practitioner - Family
Family Nurse Practitioner (Board Certified), Nurse Practitioner (Certified)
Nurse Practitioner - Family
Family Nurse Practitioner
Nurse Practitioner - Family
Doctor of Nursing Practice
Nurse Practitioner - Family
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 40 75TH ST, WILLOWBROOK, IL 605272325 (Tel: 6305815372)
Recorded as MARGARET GROSSMAYER, APRN, FNP-C
NPI status registered as active in NPPES database
Registered at 1421 WALNUT CIR, CAROL STREAM, IL 601889074 (Tel: 6307887508)
Registered at 1421 WALNUT CIR, CAROL STREAM, IL 601889074
Recorded as MARGARET GROSSMAYER
Nurse Practitioner (License #209033129 in IL)
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
1421 Walnut Cir
Carol Stream, IL 601889074
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.