Margaret Mary Grossmayer, APRN, FNP-C
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2025
- Practice address
- 865 E Geneva Rd, Carol Stream, IL 60188
- Practice phone
- Call (630) 320-6117
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Midwest Express Clinic - Carol Stream
Urgent Care Center · Carol Stream, Illinois
Find Margaret Grossmayer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Margaret Mary Grossmayer is a nurse practitioner in Carol Stream, Illinois
Margaret Grossmayer practices at Midwest Express Clinic - Carol Stream in Carol Stream, Illinois.
Margaret Grossmayer's NPI, 1548140973, was assigned on September 5, 2025. Margaret Grossmayer holds Illinois license 209033129.
- NPI
- 1548140973NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567956428
- NPI enumeration date
- September 5, 2025
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (630) 320-6117
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 27
- Medical school graduation
- 2025
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Margaret Mary Grossmayer practices at Midwest Express Clinic - Carol Stream in Carol Stream, Illinois
Margaret Grossmayer's primary practice is Midwest Express Clinic - Carol Stream, at 865 E Geneva Rd, Carol Stream, IL 60188. The practice phone is (630) 320-6117.
- Midwest Express Clinic - Carol Stream865 E Geneva Rd, Carol Stream, IL 60188Phone(630) 320-6117
Source: Dmand AI Affiliation Data
Margaret Mary Grossmayer is affiliated with 2 sites of care and 1 medical group
Margaret Grossmayer's primary practice is Midwest Express Clinic - Carol Stream in Carol Stream, Illinois. The medical group on file is Midwest Express Clinic. Dmand AI also links Margaret Grossmayer to 1 more group practice or clinic, named with a free account. Margaret Grossmayer's employer is on file too: an urgent care center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Margaret Mary Grossmayer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Margaret Grossmayer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Midwest Express Clinic - Carol Stream | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Margaret Mary Grossmayer is one of 4,254 nurse practitioners in Illinois
Nurse practitioner is Margaret Grossmayer's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Margaret Grossmayer is licensed in Illinois.
Specialties and state licenses
- Nurse practitioner, IllinoisPrimary
Nurse practitioners near Margaret Grossmayer
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Margaret Mary Grossmayer's patients have a median age of 30
Across all payers, Dmand AI patient panel data puts Margaret Grossmayer's median patient age at 30, with 61% women.
Margaret Grossmayer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 30
Patient panel by sex, all payers
- Women61%
- Men39%
Source: Dmand AI Patient Panel Data
How Margaret Mary Grossmayer takes part in Medicare
Margaret Grossmayer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Margaret Mary Grossmayer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Margaret Mary Grossmayer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Margaret Mary Grossmayer's NPI number?
Margaret Mary Grossmayer's NPI number is 1548140973. It was assigned on September 5, 2025, and it is active in the NPI Registry.
What does Margaret Mary Grossmayer specialize in?
Margaret Mary Grossmayer is a nurse practitioner in Carol Stream, Illinois. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Margaret Mary Grossmayer practice?
Margaret Grossmayer practices at 865 E Geneva Rd, Carol Stream, IL 60188. Margaret Grossmayer's primary practice is Midwest Express Clinic - Carol Stream in Carol Stream, Illinois. Dmand AI also links Margaret Grossmayer to 1 group practice or clinic.
What is Margaret Mary Grossmayer's office phone number?
The practice phone on file for Margaret Grossmayer is (630) 320-6117.
What is Margaret Mary Grossmayer's medical license number?
Margaret Grossmayer holds Illinois license 209033129.
What medical group is Margaret Mary Grossmayer part of?
Margaret Grossmayer is linked to Midwest Express Clinic.
Does Margaret Mary Grossmayer accept Medicare?
Yes. CMS lists Margaret Grossmayer as accepting Medicare assignment.
How long has Margaret Mary Grossmayer been practicing?
Margaret Grossmayer graduated from medical school in 2025, 1 years ago.
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