John P. Oppenheimer, M.D.
Anesthesiology Physician · Milwaukee, WI
John P. Oppenheimer, M.D. is an anesthesiology physician with a practice address in Milwaukee, Wisconsin, and NPI 1174507545, issued on Nov 30, 2005. Check the license (Wisconsin 29658-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John P. Oppenheimer
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 29658-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2323 N Lake Dr, Milwaukee, WI 53211
- Phone
- (414) 291-1000
- Enumerated
- Nov 30, 2005
- Record last updated
- Feb 15, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 31730900 WI
- Medicare enrollment
- Enrolled (PECOS I20160128001566); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1987
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,313 in Wisconsin → Look up another NPI →
Also registered at 2323 N Lake Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John P. Oppenheimer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 29658-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average anesthesiology physician in 2024
14 Medicare Part D claims, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D.
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.
John P. Oppenheimer among 1,313 anesthesiology physician records in Wisconsin
John P. Oppenheimer, M.D. is one of 1,313 anesthesiology physician records with a practice address in Wisconsin. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 80% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1987 · median 2006 among the 872 with a school on file
- Record last updated2009 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
387 anesthesiology physician records list a practice address in Milwaukee
They are 387 of the 18,389 NPPES records with a practice address in Milwaukee, and 1,313 anesthesiology physician records in Wisconsin.
All 1,313 in Wisconsin → Every provider in Milwaukee → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Gregory Boulanger, M.D.Milwaukee, WI 532111184607160
- Edward Bryke, M.D.Milwaukee, WI 532111861476160
- Mark Case, M.D.Milwaukee, WI 532111801879515
- Anil Dogra, M.D.Milwaukee, WI 532111992788814
- Gregory Downs, M.D.Milwaukee, WI 532111982687810
- Ray Dzelzkalns, M.D.Milwaukee, WI 532111578546107
- Gerard W. Graham, M.D.Milwaukee, WI 532111790768596
- Laurie Kabins, M.D.Milwaukee, WI 532111114900677
Common questions
What is John P. Oppenheimer, M.D.'s NPI number?
John P. Oppenheimer, M.D.'s National Provider Identifier (NPI) is 1174507545, issued on Nov 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John P. Oppenheimer, M.D. located?
The NPPES record lists a practice address at 2323 N Lake Dr, Milwaukee, WI, 53211. Phone: (414) 291-1000. Providers update this record themselves, so call before visiting.
How can I verify John P. Oppenheimer, M.D.'s license?
NPPES lists Wisconsin license number 29658-020, 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 John P. Oppenheimer, M.D. prescribe under Medicare Part D?
In 2024, John P. Oppenheimer, M.D. had 14 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.