William T. Witmer, MD
Interventional Cardiology Physician · Green Bay, WI
William T. Witmer, MD is an interventional cardiology physician with a practice address in Green Bay, Wisconsin, and NPI 1033130653, issued on Jul 21, 2006. Check the license (Wisconsin 30867, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William T. Witmer
- Credential
- MD
- Primary taxonomy
- Interventional Cardiology Physician 207RI0011X
- License number
- 30867 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2845 Greenbrier RD Ste 310, Green Bay, WI 54311
- Phone
- (920) 288-8300
- Enumerated
- Jul 21, 2006
- Record last updated
- Sep 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (920) 288-8305
- Medicaid ID
- 34603000 WI
- Medicare enrollment
- Enrolled (PECOS I20050112000154); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest interventional cardiology physician records → All 129 in Wisconsin → Look up another NPI →
Also registered at 2845 Greenbrier RD Ste 310
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Freeman, MDCardiovascular Disease Physician1417997958
- Adam Harrig, PAPhysician Assistant1134387871
- David Mathias, MDInterventional Cardiology Physician1932137114
- Samantha McMahon, FNP-BCNurse Practitioner1003636879
- Ramon Ray Rayel, MDCardiovascular Disease Physician1407828676
Verify William T. Witmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 30867Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average interventional cardiology physician in 2024
2,878 Medicare Part D claims for 489 beneficiaries, against an average of 3,179 among the 6,605 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Metoprolol Succinate353 claims
- Rosuvastatin Calcium329 claims
- Atorvastatin Calcium317 claims
- Losartan Potassium155 claims
- Carvedilol144 claims
- Eliquis128 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
- Baycare Aurora LLCNeenah, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William T. Witmer among 129 interventional cardiology physician records in Wisconsin
William T. Witmer, MD is one of 129 interventional cardiology physician records with a practice address in Wisconsin. 92% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 44% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 86% of these records are
- Graduated1988 · median 1998 among the 111 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 207RI0011X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Interventional Cardiology Physician providers in Wisconsin
There are 129 interventional cardiology physician records in Wisconsin.
All 129 in Wisconsin → Every provider in Green Bay → Interventional Cardiology Physician nationwide →
The 8 interventional cardiology physician records with the nearest ZIP codes
- David Mathias, MDGreen Bay, WI 543111932137114
- Matthew Schmidt, M.D.Green Bay, WI 543111275628935
- Kristopher Selke, DOGreen Bay, WI 543111376747733
- Armaan Shaikh, D.O.Green Bay, WI 543111174841985
- Scott Weslow, MDGreen Bay, WI 543111104836113
- Simil Gala, M.D.Green Bay, WI 543031073716445
- Zhaowei Ai, MDGreen Bay, WI 543011487645271
- Jennifer Davis, M.D.Green Bay, WI 543011801159264
Common questions
What is William T. Witmer, MD's NPI number?
William T. Witmer, MD's National Provider Identifier (NPI) is 1033130653, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William T. Witmer, MD located?
The NPPES record lists a practice address at 2845 Greenbrier RD Ste 310, Green Bay, WI, 54311. Phone: (920) 288-8300. Providers update this record themselves, so call before visiting.
How can I verify William T. Witmer, MD's license?
NPPES lists Wisconsin license number 30867, 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 William T. Witmer, MD prescribe under Medicare Part D?
In 2024, William T. Witmer, MD had 2,878 Medicare Part D claims for 489 beneficiaries; the average among interventional cardiology physician prescribers was 3,179. 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.