John J. Warner, MD
Diagnostic Radiology Physician · Marshfield, WI
John J. Warner, MD is a diagnostic radiology physician with a practice address in Marshfield, Wisconsin, and NPI 1831291871, issued on Sep 1, 2006. Check the license (Wisconsin 28299, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John J. Warner
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 28299 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1000 N Oak Ave, Marshfield, WI 54449
- Phone
- (715) 389-3555
- Enumerated
- Sep 1, 2006
- Record last updated
- Sep 10, 2024
- Medicaid ID
- 30815000 WI
- Medicare enrollment
- Enrolled (PECOS I20050929000700); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,005 in Wisconsin → Look up another NPI →
Also registered at 1000 N Oak Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John J. Warner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 28299Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 78.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Marshfield Clinic IncEau Claire, WI
- Mchs Hospitals IncMarshfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John J. Warner among 1,005 diagnostic radiology physician records in Wisconsin
John J. Warner, MD is one of 1,005 diagnostic radiology physician records with a practice address in Wisconsin. 68% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1983 · median 2006 among the 664 with a school on file
- Record last updated2024 · 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 2085R0202X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 diagnostic radiology physician records list a practice address in Marshfield
They are 22 of the 1,360 NPPES records with a practice address in Marshfield, and 1,005 diagnostic radiology physician records in Wisconsin.
All 1,005 in Wisconsin → Every provider in Marshfield → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Eric Callaghan, MDMarshfield, WI 544491528056488
- Brett Carmichael, MDMarshfield, WI 544491871587584
- Margo Cousins, MDMarshfield, WI 544491477655157
- Thomas Hinke, MD FACRMarshfield, WI 544491497857320
- Lawrence Hutchins, MDMarshfield, WI 544491215039276
- Charles Kenney, MDMarshfield, WI 544491528172491
- Kayiguvwe Kragha, M.D.Marshfield, WI 544491972551315
- William Manor, DOMarshfield, WI 544491225130982
Common questions
What is John J. Warner, MD's NPI number?
John J. Warner, MD's National Provider Identifier (NPI) is 1831291871, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John J. Warner, MD located?
The NPPES record lists a practice address at 1000 N Oak Ave, Marshfield, WI, 54449. Phone: (715) 389-3555. Providers update this record themselves, so call before visiting.
How can I verify John J. Warner, MD's license?
NPPES lists Wisconsin license number 28299, 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.
What is John J. Warner, MD's MIPS final score?
The 2023 MIPS final score is 78.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.