Gretta C. Grube, APNP
Family Nurse Practitioner · Oshkosh, WI
Gretta C. Grube, APNP is a family nurse practitioner with a practice address in Oshkosh, Wisconsin, and NPI 1578963096, issued on Sep 3, 2014. Check the license (Wisconsin 5971-33, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gretta C. Grube
- Credential
- APNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 5971-33 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2700 W 9TH Ave, Oshkosh, WI 54904
- Phone
- (920) 236-1750
- Enumerated
- Sep 3, 2014
- Record last updated
- Sep 13, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Also registered at 2700 W 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gretta C. Grube in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 5971-33Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average family nurse practitioner in 2024
259 Medicare Part D claims for 24 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril26 claims
- Hydrochlorothiazide22 claims
- Simvastatin21 claims
- Amlodipine Besylate18 claims
- Levothyroxine Sodium16 claims
- Spironolactone16 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.
Industry payments in 2024: $48.17
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gretta C. Grube among 2,814 family nurse practitioner records in Wisconsin
Gretta C. Grube, 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 2014, is newer than 29% of them.
- NPI issued2014 · 29% of these records are older, 66% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2019 · 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).
35 family nurse practitioner records list a practice address in Oshkosh
They are 35 of the 1,527 NPPES records with a practice address in Oshkosh, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Oshkosh → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Meghan Boll, APNPOshkosh, WI 549041992471973
- Audrey Essien, DNP, FNP-BCOshkosh, WI 549041316827611
- Jennifer KruegerOshkosh, WI 549041033670088
- Jennifer Mladucky, NPOshkosh, WI 549041003941956
- Morgan MoslingOshkosh, WI 549041023797487
- Cheryl Pucci, APNPOshkosh, WI 549041518952829
- Jessica Rice, FNPOshkosh, WI 549041255058897
- Laura Rogers, APNPOshkosh, WI 549041902158140
Common questions
What is Gretta C. Grube, APNP's NPI number?
Gretta C. Grube, APNP's National Provider Identifier (NPI) is 1578963096, issued on Sep 3, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gretta C. Grube, APNP located?
The NPPES record lists a practice address at 2700 W 9TH Ave, Oshkosh, WI, 54904. Phone: (920) 236-1750. Providers update this record themselves, so call before visiting.
How can I verify Gretta C. Grube, APNP's license?
NPPES lists Wisconsin license number 5971-33, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Gretta C. Grube, APNP prescribe under Medicare Part D?
In 2024, Gretta C. Grube, APNP had 259 Medicare Part D claims for 24 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
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.