Mark Schaten
Internal Medicine Physician · Delafield, WI
Mark Schaten is an internal medicine physician with a practice address in Delafield, Wisconsin, and NPI 1356458632, issued on Aug 24, 2006. Check the license (Wisconsin 43023, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark Schaten
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 43023 WI
Self-reported in NPPES; status is on the state search - Practice location
- S4W31227 Hidden Holw, Delafield, WI 53018
- Phone
- (920) 948-9301
- Enumerated
- Aug 24, 2006
- Record last updated
- May 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Verify Mark Schaten in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 43023Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
55 Medicare Part D claims for 18 beneficiaries, against an average of 3,176 among the 108,855 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.
Mark Schaten among 2,078 internal medicine physician records in Wisconsin
Mark Schaten 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. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2021 · 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).
4 internal medicine physician records list a practice address in Delafield
They are 4 of the 174 NPPES records with a practice address in Delafield, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Delafield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Hayes Hatfield, MDDelafield, WI 530181669710869
- Susan Russler, M.D.Delafield, WI 530181538328463
- Roger Watson, M.D.Delafield, WI 530181932172327
- Gurmeet Bhatia, M.D.Cleveland, WI 530151164441440
- Avi Bernstein, MDGermantown, WI 530221972643252
- Stephanie Momper, MDGermantown, WI 530221194899005
- Megan Rotzenberg, M.D.Germantown, WI 530221285084335
- Christopher WeberGermantown, WI 530221619140001
Common questions
What is Mark Schaten's NPI number?
Mark Schaten's National Provider Identifier (NPI) is 1356458632, issued on Aug 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Schaten located?
The NPPES record lists a practice address at S4W31227 Hidden Holw, Delafield, WI, 53018. Phone: (920) 948-9301. Providers update this record themselves, so call before visiting.
How can I verify Mark Schaten's license?
NPPES lists Wisconsin license number 43023, 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 Mark Schaten prescribe under Medicare Part D?
In 2024, Mark Schaten had 55 Medicare Part D claims for 18 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.