Sandra Schaffer, APNP, FNP
NPI 1588828503 · Family Nurse Practitioner · Oshkosh, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sandra Schaffer, APNP, FNP is a Family Nurse Practitioner provider in Oshkosh, WI (NPI 1588828503).
Provider details
- NPI number
- 1588828503
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP, FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 3459-33 (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 tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 203 | 92 |
| Lisinopril | 111 | 46 |
| Amlodipine Besylate | 96 | 46 |
| Levothyroxine Sodium | 96 | 42 |
| Losartan Potassium | 86 | 41 |
| Metformin Hcl | 67 | 25 |
| Citalopram Hydrobromide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-18
- Last updated
- 2008-11-12
Frequently asked questions
- What is Sandra Schaffer's NPI number?
- Sandra Schaffer's National Provider Identifier (NPI) is 1588828503, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sandra Schaffer's specialty?
- Sandra Schaffer is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sandra Schaffer located?
- Sandra Schaffer's practice location on file with NPPES is 1855 S Koeller St, Oshkosh, WI 54902-6214.
- What is Sandra Schaffer's phone number?
- The practice phone number listed in the NPPES registry for Sandra Schaffer is (920) 223-7136.
- Does Sandra Schaffer accept Medicare?
- Sandra Schaffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sandra Schaffer's NPI active?
- Yes — Sandra Schaffer's NPI (1588828503) is active in the NPPES registry as of the last update on 2008-11-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.