Gregory Buck, MD
Internal Medicine Physician · Wauwatosa, WI
Gregory Buck, MD is an internal medicine physician with a practice address in Wauwatosa, Wisconsin, and NPI 1417989641, issued on Jul 7, 2006. Check the license (Wisconsin 25211, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory Buck
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 25211 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3289 N Mayfair RD, Wauwatosa, WI 53222
- Phone
- (414) 771-7900
- Enumerated
- Jul 7, 2006
- Entity
- Type 1 · individual
Also registered at 3289 N Mayfair RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raymond Ballecer, MDInternal Medicine Physician1881741148
- Paul BoechlerPhysician Assistant1932732484
- Erin Burdt-Davis, D.O.Family Medicine Physician1780388827
- Curtis Cornella-Carlson, DOObstetrics & Gynecology Physician1205867611
- Mackenzee Derrick, AGACNP-BCAcute Care Nurse Practitioner1821576406
- Connie Desarden, M.D.Internal Medicine Physician1306100227
Verify Gregory Buck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 25211Check 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 internal medicine physician records list a Wauwatosa practice address
They are 44 of the 1,787 NPPES records with a Wauwatosa practice address, and 2,832 internal medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 44 in Wauwatosa → All 2,832 in Wisconsin → Every provider in Wauwatosa →
Other internal medicine physician records in Wisconsin
- Sheetal Aatrai, MDMarshfield, WI1417568965
- Noormuhammad Abbasakoor, M.D.Sheboygan, WI1558645895
- Khalid Abdelgadir, MDManitowoc, WI1407433295
- Kareem Abdelhadi, MDRice Lake, WI1841494432
- Mesfin Abdissa, MDMilwaukee, WI1376579417
- Mohamed Fouzi Abdul Hameed, M.D.Weston, WI1255590899
- Hamza Abdul Majeed, DOMilwaukee, WI1881013282
- Anas Abed, MDMadison, WI1659002566
- Sameem Abedin, MDMilwaukee, WI1063641157
- Vincent Abejuela, DOMilwaukee, WI1356928543
Common questions
What is Gregory Buck, MD's NPI number?
Gregory Buck, MD's National Provider Identifier (NPI) is 1417989641, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Buck, MD located?
The NPPES record lists a practice address at 3289 N Mayfair RD, Wauwatosa, WI, 53222. Phone: (414) 771-7900. Providers update this record themselves, so call before visiting.
How can I verify Gregory Buck, MD's license?
NPPES lists Wisconsin license number 25211, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.