Gretta Grube, APNP
NPI 1578963096 · Family Nurse Practitioner · Oshkosh, WI
Gretta Grube, APNP is a Family Nurse Practitioner provider in Oshkosh, WI (NPI 1578963096).
Provider details
- NPI number
- 1578963096
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP
- Sex
- Female
- Sole proprietor
- No
- License
- 5971-33 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
11 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Lisinopril | 26 |
| Hydrochlorothiazide | 22 |
| Simvastatin | 21 |
| Amlodipine Besylate | 18 |
| Levothyroxine Sodium | 16 |
| Spironolactone | 16 |
| Losartan Potassium | 12 |
| Atorvastatin Calcium | 11 |
| Zolpidem Tartrate | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2350 N Lake DrSte 206Milwaukee, WI 53211-4528Phone: (414) 298-7280
Registry dates
- Enumerated
- 2014-09-03
- Last updated
- 2019-09-13
Frequently asked questions
- What is Gretta Grube's NPI number?
- Gretta Grube's National Provider Identifier (NPI) is 1578963096, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretta Grube's specialty?
- Gretta Grube is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gretta Grube located?
- Gretta Grube's practice location on file with NPPES is 2700 W 9th Ave, Oshkosh, WI 54904-7247.
- What is Gretta Grube's phone number?
- The practice phone number listed in the NPPES registry for Gretta Grube is (920) 236-1750.
- Is Gretta Grube's NPI active?
- Yes — Gretta Grube's NPI (1578963096) is active in the NPPES registry as of the last update on 2019-09-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.