Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
MS. MARGARET MARY GROSSMAYER, APRN, FNP-C
Active Sole ProprietorMS. MARGARET MARY GROSSMAYER, APRN, FNP-C is a Nurse Practitioner healthcare provider located in WILLOWBROOK, Illinois. NPI 1548140973 is currently active in the NPPES registry. Verify at CMS.
Nurse Practitioner · WILLOWBROOK, IL
Registration Details
- NPI Number
- 1548140973
- Provider Type
- Individual
- Gender
- Female
- NPI Issued
- Sep 5, 2025 (0.90213924604382 yrs)
- Last Updated
- Nov 26, 2025
- License
-
209033129 (IL)
- Sole Proprietor
- Yes
Practice Information
- Address
-
40 75TH STWILLOWBROOK, IL, 605272325Browse IL providers · Browse ZIP 60527
- Phone
- 6305815372
- Primary Specialty
-
Nurse Practitioner
363L00000X
Other Nurse Practitioner Providers in WILLOWBROOK, IL
| Name | Credential | NPI |
|---|---|---|
| PATRICIA KUENZI | ANP-BC | 1003155375 |
| CARMEN MURILLO | APRN, CNP | 1982149159 |
| MRS. JENNELYN M BELCINA | NP | 1427608090 |
| VANESSA DIAZ CLOUD | — | 1053961250 |
| MRS. PAMELA D PISZCZEK | APRN, FNP-C | 1710528740 |
| HUYEN RAGO | — | 1831735299 |
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.