Sandra K. Schaffer, APNP, FNP
Family Nurse Practitioner · Oshkosh, WI
Sandra K. Schaffer, APNP, FNP is a family nurse practitioner with a practice address in Oshkosh, Wisconsin, and NPI 1588828503, issued on Jul 18, 2008. Check the license (Wisconsin 3459-33, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sandra K. Schaffer
- Credential
- APNP, FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 3459-33 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1855 S Koeller St, Oshkosh, WI 54902
- Phone
- (920) 223-7136
- Enumerated
- Jul 18, 2008
- Record last updated
- Nov 12, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (920) 223-7462
- Medicaid ID
- 36090000 WI
- Medicare enrollment
- Enrolled (PECOS I20251124004148); 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 1855 S Koeller St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samantha AdamsFamily Nurse Practitioner1467853622
- Kristian Bastress, DNP, APNP, FNP-BCFamily Nurse Practitioner1154947851
- Angela Beach, NP-CFamily Nurse Practitioner1881197028
- Brenda Brusky, NPAdult Health Nurse Practitioner1760749097
- Steven Cavness, PHDPsychologist1669466421
- David Coleman, MDFamily Medicine Physician1639170301
Verify Sandra K. Schaffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3459-33Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average family nurse practitioner in 2024
2,217 Medicare Part D claims for 319 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Atorvastatin Calcium203 claims
- Lisinopril111 claims
- Amlodipine Besylate96 claims
- Levothyroxine Sodium96 claims
- Losartan Potassium86 claims
- Metformin Hcl67 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): 77.8 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).
Sandra K. Schaffer among 2,814 family nurse practitioner records in Wisconsin
Sandra K. Schaffer, APNP, FNP 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 updated2008 · 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
- Samantha AdamsOshkosh, WI 549021467853622
- Kristian Bastress, DNP, APNP, FNP-BCOshkosh, WI 549021154947851
- Angela Beach, NP-COshkosh, WI 549021881197028
- Jessica Bielmeier, FNP-COshkosh, WI 549021235253030
- Christine Hyde, NPOshkosh, WI 549021780215251
- Kassondra Korth, APNPOshkosh, WI 549021336639202
- McKenna McGill Barden, FNPOshkosh, WI 549021811786932
- Tiffany MennenOshkosh, WI 549021710751813
Common questions
What is Sandra K. Schaffer, APNP, FNP's NPI number?
Sandra K. Schaffer, APNP, FNP's National Provider Identifier (NPI) is 1588828503, issued on Jul 18, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Sandra K. Schaffer, APNP, FNP located?
The NPPES record lists a practice address at 1855 S Koeller St, Oshkosh, WI, 54902. Phone: (920) 223-7136. Providers update this record themselves, so call before visiting.
How can I verify Sandra K. Schaffer, APNP, FNP's license?
NPPES lists Wisconsin license number 3459-33, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Sandra K. Schaffer, APNP, FNP prescribe under Medicare Part D?
In 2024, Sandra K. Schaffer, APNP, FNP had 2,217 Medicare Part D claims for 319 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
What is Sandra K. Schaffer, APNP, FNP's MIPS final score?
The 2023 MIPS final score is 77.8 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.