Douglas E. Puffer, M.D.
Hematology & Oncology Physician · Mequon, WI
Douglas E. Puffer, M.D. is a hematology & oncology physician with a practice address in Mequon, Wisconsin, and NPI 1366463267, issued on Jul 23, 2006. Check the license (Wisconsin 40365-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Douglas E. Puffer
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 40365-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 13111 N Port Washington RD, Mequon, WI 53097
- Phone
- (262) 243-7454
- Enumerated
- Jul 23, 2006
- Record last updated
- Oct 22, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (262) 243-7482
- Medicaid ID
- 34425400 WI
- Medicare enrollment
- Enrolled (PECOS I20070319000336); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 295 in Wisconsin → Look up another NPI →
Also registered at 13111 N Port Washington RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beth Adams, PA-CPhysician Assistant1801237540
- Laura Alar, R.PH.Pharmacist1023358728
- Elizabeth Alfonsi, DPT, ATCPhysical Therapist1861705998
- Kathleen Andersen, MS, OTR/LOccupational Therapist1316958200
- Kassandra Bartelme, PHARM.D.Pharmacist1881823367
- Abbey BeckRegistered Dietitian1083251631
Verify Douglas E. Puffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 40365-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average hematology & oncology physician in 2024
1,808 Medicare Part D claims for 284 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 155 claims were for opioids.
Most prescribed
- Anastrozole269 claims
- Eliquis99 claims
- Prochlorperazine Maleate84 claims
- Prednisone71 claims
- Potassium Chloride67 claims
- Letrozole62 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
- Columbia St Marys Hospital Milwaukee IncMequon, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas E. Puffer among 295 hematology & oncology physician records in Wisconsin
Douglas E. Puffer, M.D. is one of 295 hematology & oncology physician records with a practice address in Wisconsin. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1997 · median 2004 among the 217 with a school on file
- Record last updated2012 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Wisconsin
There are 295 hematology & oncology physician records in Wisconsin.
All 295 in Wisconsin → Every provider in Mequon → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Abdel Hai Alqwasmi, M.DWest Bend, WI 530951003055302
- John Burfeind, MDWest Bend, WI 530951316026214
- Ajit Divgi, MDWest Bend, WI 530951568453223
- Sailaja Kamaraju, MDWest Bend, WI 530951093763260
- Colin Mooney, MDWest Bend, WI 530951831302082
- Lisa Sullivan, BSN, RN, OCNWest Bend, WI 530951912876574
- Shamsuddin Virani, M.D.Burlington, WI 531051821209768
- Qiaofang Chen, M.D.Sheboygan, WI 530811619161890
Common questions
What is Douglas E. Puffer, M.D.'s NPI number?
Douglas E. Puffer, M.D.'s National Provider Identifier (NPI) is 1366463267, issued on Jul 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Douglas E. Puffer, M.D. located?
The NPPES record lists a practice address at 13111 N Port Washington RD, Mequon, WI, 53097. Phone: (262) 243-7454. Providers update this record themselves, so call before visiting.
How can I verify Douglas E. Puffer, M.D.'s license?
NPPES lists Wisconsin license number 40365-020, 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 Douglas E. Puffer, M.D. prescribe under Medicare Part D?
In 2024, Douglas E. Puffer, M.D. had 1,808 Medicare Part D claims for 284 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.