NPPES file of Aug 9, 2026

David R. Mertens, MD

Hematology & Oncology Physician · Marinette, WI

David R. Mertens, MD is a hematology & oncology physician with a practice address in Marinette, Wisconsin, and NPI 1003917303, issued on Sep 26, 2006. Check the license (Wisconsin 21292, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1003917303
Name
David R. Mertens
Credential
MD
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
21292 WI
Self-reported in NPPES; status is on the state search
Practice location
3100 Shore Dr, Marinette, WI 54143
Phone
(715) 735-6523
Enumerated
Sep 26, 2006
Record last updated
Mar 7, 2023
Medicaid ID
30346700 WI
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 295 in Wisconsin → Look up another NPI →

Also registered at 3100 Shore Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Bianca Asan Borja, M.D.Emergency Medicine Physician1306258728
  2. Leigh Brooks, OTROccupational Therapist1881920999
  3. Trudi Chase, MDHematology & Oncology Physician1225009137
  4. Brian Cleven, ATC, LAT, RCEPAthletic Trainer1750789392
  5. Danielle Denruyter, RDRegistered Dietitian1073766861
  6. Jena DoemelRegistered Dietitian1104228220

Verify David R. Mertens in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 21292    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Wisconsin license search

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David R. Mertens among 295 hematology & oncology physician records in Wisconsin

David R. Mertens, MD is one of 295 hematology & oncology physician records with a practice address in Wisconsin. 82% 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 8% of them.

  • NPI issued2006 · 8% of these records are older, 59% newer
  • In a Medicare fileNo · 82% of these records are
  • In the CMS Doctors and Clinicians fileNo · 74% of these records are
  • Record last updated2023 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Wisconsin

There are 295 hematology & oncology physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 295 in Wisconsin → Every provider in Marinette → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Emmanouil Alimpertis, M.D.Marinette, WI 541431366827768
  2. Trudi Chase, MDMarinette, WI 541431225009137
  3. Stephanie Fries, MDMarinette, WI 541431154681377
  4. Osama Halaweh, MDMarinette, WI 541431578519625
  5. Shadi Hamdan, M.D.Marinette, WI 541431801088992
  6. Anthony Phillips, M.D.Shawano, WI 541661780729020
  7. Andrew Yetter, MDTwo Rivers, WI 542411578586368
  8. Craig MescherNew Richmond, WI 540171629377874

Common questions

What is David R. Mertens, MD's NPI number?

David R. Mertens, MD's National Provider Identifier (NPI) is 1003917303, issued on Sep 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is David R. Mertens, MD located?

The NPPES record lists a practice address at 3100 Shore Dr, Marinette, WI, 54143. Phone: (715) 735-6523. Providers update this record themselves, so call before visiting.

How can I verify David R. Mertens, MD's license?

NPPES lists Wisconsin license number 21292, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.