Mark A. Gennis, MD
Internal Medicine Physician · Milwaukee, WI
Mark A. Gennis, MD is an internal medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1164570644, issued on Jan 8, 2007. Check the license (Wisconsin 26971-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark A. Gennis
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 26971-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1020 N 12TH St, Milwaukee, WI 53233
- Phone
- (414) 219-7724
- Enumerated
- Jan 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 30676400 WI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 1020 N 12TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ruric (andy) Anderson, MDInternal Medicine Physician1205995255
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- Cynthia Beale, CNMAdvanced Practice Midwife1821273350
- Krista BergerAdvanced Practice Midwife1245100841
Verify Mark A. Gennis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 26971-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark A. Gennis among 2,078 internal medicine physician records in Wisconsin
Mark A. Gennis, MD 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 2007, is newer than 54% of them.
- NPI issued2007 · 54% of these records are older, 40% newer
- In a Medicare fileNo · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 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).
382 internal medicine physician records list a practice address in Milwaukee
They are 382 of the 18,389 NPPES records with a practice address in Milwaukee, 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 Milwaukee → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ruric (andy) Anderson, MDMilwaukee, WI 532331205995255
- Robin Brown, M.D.Milwaukee, WI 532331881776458
- Carolina Conti, M.D.Milwaukee, WI 532331750340766
- Ellen Danto-Nocton, M.D.Milwaukee, WI 532331265440002
- Thomas Jackson, MDMilwaukee, WI 532331629186242
- Manuel Joseph, MDMilwaukee, WI 532331447391123
- Ariba Khan, MDMilwaukee, WI 532331891802328
- Biana Leybishkis, MDMilwaukee, WI 532331558478008
Common questions
What is Mark A. Gennis, MD's NPI number?
Mark A. Gennis, MD's National Provider Identifier (NPI) is 1164570644, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Gennis, MD located?
The NPPES record lists a practice address at 1020 N 12TH St, Milwaukee, WI, 53233. Phone: (414) 219-7724. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Gennis, MD's license?
NPPES lists Wisconsin license number 26971-020, 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.
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.