Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

MS. Denise Grebe Maris, FNP-BCAPNP

Individual provider Family Nurse Practitioner · NPI 1649423799

MS. Denise Grebe Maris, FNP-BCAPNP is a Nurse Practitioner in Milwaukee, Wisconsin. Qualified in 2008, 18 years ago. Practices with Ascension Medical Group-Southeast Wisconsin Inc, a 555-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
18
Licensed in
WI
In the registry since
2008
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Practice location Address checks out

2311 N Prospect Ave
Milwaukee, WI 53211-4445
Phone: (414) 319-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 3530-33 (WI)

Record details

NPI number1649423799
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BCAPNP
Sole proprietorNo
NPI enumeratedNovember 1, 2008
Last updated in NPPESSeptember 16, 2022
Certification dateSeptember 16, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Ascension Medical Group-Southeast Wisconsin Inc — 555 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients46
Services billed 65 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Ascension Medical Group-Southeast Wisconsin Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 555 clinicians in the practice; 12 are shown here.

Other providers in Milwaukee