Joseph P. Marik, MD
Internal Medicine Physician · Fond Du Lac, WI
Joseph P. Marik, MD is an internal medicine physician with a practice address in Fond Du Lac, Wisconsin, and NPI 1710969860, issued on Nov 15, 2005. Check the license (Wisconsin 33089, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Joseph P. Marik
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 33089 WI
Self-reported in NPPES; status is on the state search - Practice location
- 420 E Division St, Fond Du Lac, WI 54935
- Phone
- (920) 926-8420
- Enumerated
- Nov 15, 2005
- Record last updated
- Mar 2, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 31794700 WI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 420 E Division St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Berenz, FNP-BCFamily Nurse Practitioner1619386885
- Melissa Berggren, PA-CPhysician Assistant1639377617
- Louann Biddick, NPNurse Practitioner1770566721
- Jennifer Bissell, MDFamily Medicine Physician1316146962
- Tiffany Boelk, APNPNurse Practitioner1700459690
- David Bowman, M.D.Cardiovascular Disease Physician1962492397
Verify Joseph P. Marik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 33089Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Joseph P. Marik among 2,078 internal medicine physician records in Wisconsin
Joseph P. Marik, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileNo · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2016 · 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).
19 internal medicine physician records list a practice address in Fond Du Lac
They are 19 of the 1,312 NPPES records with a practice address in Fond Du Lac, 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 Fond Du Lac → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- E Ayala, MDFond Du Lac, WI 549351821089541
- Oliver Clements, MDFond Du Lac, WI 549351184615429
- Robert Grass, MDFond Du Lac, WI 549351689665093
- Punit Kumar, MDFond Du Lac, WI 549351144271990
- Madhulika Lall, MDFond Du Lac, WI 549351821009838
- Gabriel Litman, MDFond Du Lac, WI 549351184731630
- Jay Muller, MDFond Du Lac, WI 549351053305961
- Radhika Raj, MDFond Du Lac, WI 549351669467072
Common questions
What is Joseph P. Marik, MD's NPI number?
Joseph P. Marik, MD's National Provider Identifier (NPI) is 1710969860, issued on Nov 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph P. Marik, MD located?
The NPPES record lists a practice address at 420 E Division St, Fond Du Lac, WI, 54935. Phone: (920) 926-8420. Providers update this record themselves, so call before visiting.
How can I verify Joseph P. Marik, MD's license?
NPPES lists Wisconsin license number 33089, 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.