Denise Grebe Maris, FNP-BC APNP
Family Nurse Practitioner · Milwaukee, WI
Denise Grebe Maris, FNP-BC APNP is a family nurse practitioner with a practice address in Milwaukee, Wisconsin, and NPI 1649423799, issued on Nov 1, 2008. Check the license (Wisconsin 3530-33, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Denise Grebe Maris
- Credential
- FNP-BC APNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 3530-33 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2311 N Prospect Ave, Milwaukee, WI 53211
- Phone
- (414) 319-3000
- Enumerated
- Nov 1, 2008
- Record last updated
- Sep 16, 2022
- Medicare enrollment
- Enrolled (PECOS I20090120000415); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Also registered at 2311 N Prospect Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Denise Grebe Maris in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3530-33Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average family nurse practitioner in 2024
145 Medicare Part D claims for 60 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 61% of claims.
Most prescribed
- Albuterol Sulfate Hfa22 claims
- Anoro Ellipta11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 75.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Ascension Medical Group-Southeast Wisconsin IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Denise Grebe Maris among 2,814 family nurse practitioner records in Wisconsin
Denise Grebe Maris, FNP-BC APNP is one of 2,814 family nurse practitioner records with a practice address in Wisconsin. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 14% of them.
- NPI issued2008 · 14% of these records are older, 84% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2008 · median 2019 among the 1,740 with a school on file
- Record last updated2022 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
458 family nurse practitioner records list a practice address in Milwaukee
They are 458 of the 18,389 NPPES records with a practice address in Milwaukee, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Milwaukee → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Heather Bastjan, FNPMilwaukee, WI 532111578921375
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- Ellen Buggy, N.P.Milwaukee, WI 532111750509659
- Karen Chamberlain, APNPMilwaukee, WI 532111043367444
- Audra Felker, NP-CMilwaukee, WI 532111083947451
- Melissa Gellings, APNPMilwaukee, WI 532111184964355
- Raymond Grundman, RN, MSN, FNP-CMilwaukee, WI 532111952511420
- Jennifer Kapetsonis, APNPMilwaukee, WI 532111760829154
Common questions
What is Denise Grebe Maris, FNP-BC APNP's NPI number?
Denise Grebe Maris, FNP-BC APNP's National Provider Identifier (NPI) is 1649423799, issued on Nov 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Denise Grebe Maris, FNP-BC APNP located?
The NPPES record lists a practice address at 2311 N Prospect Ave, Milwaukee, WI, 53211. Phone: (414) 319-3000. Providers update this record themselves, so call before visiting.
How can I verify Denise Grebe Maris, FNP-BC APNP's license?
NPPES lists Wisconsin license number 3530-33, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Denise Grebe Maris, FNP-BC APNP prescribe under Medicare Part D?
In 2024, Denise Grebe Maris, FNP-BC APNP had 145 Medicare Part D claims for 60 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
What is Denise Grebe Maris, FNP-BC APNP's MIPS final score?
The 2023 MIPS final score is 75.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.