Peter T. Geiss, M.D.
Internal Medicine Physician · Waukesha, WI
Peter T. Geiss, M.D. is an internal medicine physician with a practice address in Waukesha, Wisconsin, and NPI 1881666782, issued on Feb 3, 2006. Check the license (Wisconsin 24374, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Peter T. Geiss
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 24374 WI
Self-reported in NPPES; status is on the state search - Practice location
- N17 W24100 Riverwood Dr, Waukesha, WI 53188
- Phone
- (262) 928-4100
- Enumerated
- Feb 3, 2006
- Record last updated
- Mar 16, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (262) 928-5835
- Medicaid ID
- 30457600 WI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Verify Peter T. Geiss in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 24374Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Peter T. Geiss among 2,078 internal medicine physician records in Wisconsin
Peter T. Geiss, M.D. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileNo · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2009 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 internal medicine physician records list a practice address in Waukesha
They are 42 of the 2,814 NPPES records with a practice address in Waukesha, and 2,078 internal medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,078 in Wisconsin → Every provider in Waukesha → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gerald Berman, M.D.Waukesha, WI 531881215909734
- William Boehm, M.D.Waukesha, WI 531881346213519
- Wendy Cooper, M.D.Waukesha, WI 531881720051824
- Thomas Dougherty, MDWaukesha, WI 531881487639902
- John Fish, M.D.Waukesha, WI 531881033188446
- Thomas Gallagher, M.D.Waukesha, WI 531881942273677
- Martin Kern, MDWaukesha, WI 531881215938758
- Sarita Makhija, M.D.Waukesha, WI 531881184697187
Common questions
What is Peter T. Geiss, M.D.'s NPI number?
Peter T. Geiss, M.D.'s National Provider Identifier (NPI) is 1881666782, issued on Feb 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter T. Geiss, M.D. located?
The NPPES record lists a practice address at N17 W24100 Riverwood Dr, Waukesha, WI, 53188. Phone: (262) 928-4100. Providers update this record themselves, so call before visiting.
How can I verify Peter T. Geiss, M.D.'s license?
NPPES lists Wisconsin license number 24374, 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), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.