Spencer Wolf Greaves, MD
Emergency Medicine Physician · Waupaca, WI
Spencer Wolf Greaves, MD is an emergency medicine physician with a practice address in Waupaca, Wisconsin, and NPI 1457844102, issued on Jun 7, 2018. Check the license (Wisconsin 76902-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Spencer Wolf Greaves
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 76902-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 800 Riverside Dr, Waupaca, WI 54981
- Phone
- (715) 258-1000
- Enumerated
- Jun 7, 2018
- Record last updated
- Apr 30, 2024
- Medicare enrollment
- Enrolled (PECOS I20220601001408); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2018
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 800 Riverside Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anita AhlbornRegistered Respiratory Therapist1639068711
- Syed Ala, MDHospitalist Physician1235233792
- Rachel Badtke, OTD, OTR/LOccupational Therapist1184513236
- Jennifer Bahr, M.D.Emergency Medicine Physician1336315324
- Mandip Bartels, M.D.Internal Medicine Physician1477569275
- Zachary Bartz, DPTPhysical Therapist1639797541
Verify Spencer Wolf Greaves in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 76902-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average emergency medicine physician in 2024
127 Medicare Part D claims for 94 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Cephalexin16 claims
- Amoxicillin-Clavulanate Potass11 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.
Bills Medicare through one group practice
- Ihc Beaver Dam Emergency Physicians, LLCBeaver Dam, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Spencer Wolf Greaves among 1,464 emergency medicine physician records in Wisconsin
Spencer Wolf Greaves, MD is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 81% of them.
- NPI issued2018 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2018 · median 2011 among the 844 with a school on file
- Record last updated2024 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 emergency medicine physician records list a practice address in Waupaca
They are 23 of the 283 NPPES records with a practice address in Waupaca, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Waupaca → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jennifer Bahr, M.D.Waupaca, WI 549811336315324
- Dale Bertram, MDWaupaca, WI 549811871550970
- Charles Conger, MDWaupaca, WI 549811811904287
- Ismail Dania, MDWaupaca, WI 549811255326070
- Francesca Detrana, DOWaupaca, WI 549811376553420
- Dennis Ford, MDWaupaca, WI 549811811078777
- Gert Hasselhof, MDWaupaca, WI 549811043289473
- Amy Kenworthy, MDWaupaca, WI 549811346335254
Common questions
What is Spencer Wolf Greaves, MD's NPI number?
Spencer Wolf Greaves, MD's National Provider Identifier (NPI) is 1457844102, issued on Jun 7, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Wolf Greaves, MD located?
The NPPES record lists a practice address at 800 Riverside Dr, Waupaca, WI, 54981. Phone: (715) 258-1000. Providers update this record themselves, so call before visiting.
How can I verify Spencer Wolf Greaves, MD's license?
NPPES lists Wisconsin license number 76902-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Spencer Wolf Greaves, MD prescribe under Medicare Part D?
In 2024, Spencer Wolf Greaves, MD had 127 Medicare Part D claims for 94 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.