Dr. John J. Warner, MD
- Medicare services, 2024
- 83
- Medicare patients, 2024
- 167
- MIPS score, 2024
- 84
- Hospital affiliations
- 5
- Industry payments
- $12
- Practice address
- 1000 N Oak Ave, Marshfield, WI 54449
- Practice phone
- Call (715) 387-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Marshfield Clinic East Wing Outpatient Building
Marshfield, Wisconsin
Find Dr. Warner's professional email, personal email and mobile number
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Dr. John J. Warner is a diagnostic radiologist in Marshfield, Wisconsin
Dr. Warner practices at Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin.
Dr. Warner's NPI, 1831291871, was assigned on September 1, 2006. Dr. Warner graduated from University of Wisconsin School of Medicine in 1983. Dr. Warner holds Wisconsin license 28299.
- NPI
- 1831291871NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4789619636
- NPI enumeration date
- September 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (715) 387-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John J. Warner practices at Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin
Dr. Warner's primary practice is Marshfield Clinic East Wing Outpatient Building, at 1000 N Oak Ave, Marshfield, WI 54449 in Wood County. The practice phone is (715) 387-5511.
- Marshfield Clinic East Wing Outpatient Building1000 N Oak Ave, Marshfield, WI 54449 · Wood CountyPhone(715) 387-5511
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John J. Warner is affiliated with 10 sites of care and 4 medical groups
Dr. Warner's primary practice is Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin. Dr. Warner is also affiliated with Marshfield Medical Center - Marshfield. The medical group on file is Marshfield Clinic Health System. Dmand AI also links Dr. Warner to 4 more hospitals, 4 group practices and clinics and 3 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John J. Warner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warner practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshfield Clinic East Wing Outpatient Building | Available with a free account |
| +9 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John J. Warner is one of 782 diagnostic radiologists in Wisconsin
Diagnostic radiology is Dr. Warner's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Warner is licensed in Wisconsin.
Specialties and state licenses
- Diagnostic radiology, WisconsinPrimary
Diagnostic radiologists near Dr. Warner
Counts of diagnostic radiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John J. Warner billed Medicare for 83 services in 2024
CMS data shows 83 Medicare services from Dr. Warner across 4 procedure codes in 2024, for 167 Medicare patients. Medicare paid $2,288 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Warner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 722024: 8315%
Dr. Warner compared with the Wisconsin median for diagnostic radiologists, 2024
- Dr. Warner
- Wisconsin median
- Medicare services
- 83vs 1,83695% below
- Medicare patients
- 167vs 1,41488% below
Medians across 758 diagnostic radiologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Warner's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Warner and other diagnostic radiologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John J. Warner treated 167 Medicare patients in 2024, average age 73
CMS counts 167 Medicare patients who saw Dr. Warner in 2024. The largest group is 65 to 74, with 59 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 26% are also on Medicaid. Their average risk score is 1.54, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Warner's median patient age at 65, with 57% women.
Dr. Warner's Medicare patients by age, 2024
Dr. Warner's Medicare patients by sex, 2024
- Women9456%
- Men7344%
Chronic conditions among Dr. Warner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Ischemic heart disease38%
- Anxiety35%
- Diabetes31%
- Chronic kidney disease29%
- Mood disorders29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John J. Warner scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Warner for performance year 2024, reported as part of a group. Dr. Warner accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Warner's MIPS scores, performance year 2024
- 84of 100Final score
- 62.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John J. Warner received $12 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Warner from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Siemens Medical Solutions USA, Inc. paid the most, $12.
Companies that paid Dr. Warner the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John J. Warner graduated from University of Wisconsin School of Medicine
Dr. Warner graduated from University of Wisconsin School of Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John J. Warner's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John J. Warner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John J. Warner's NPI number?
Dr. John J. Warner's NPI number is 1831291871. It was assigned on September 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John J. Warner?
Dr. John J. Warner is a diagnostic radiologist in Marshfield, Wisconsin. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. John J. Warner practice?
Dr. Warner practices at 1000 N Oak Ave, Marshfield, WI 54449. Dr. Warner's primary practice is Marshfield Clinic East Wing Outpatient Building in Marshfield, Wisconsin. Dmand AI also links Dr. Warner to 4 hospitals, 4 group practices and clinics and 3 medical groups.
What is Dr. John J. Warner's office phone number?
The practice phone on file for Dr. Warner is (715) 387-5511.
What is Dr. John J. Warner's medical license number?
Dr. Warner holds Wisconsin license 28299.
Which hospitals is Dr. John J. Warner affiliated with?
Dr. Warner is affiliated with Marshfield Medical Center - Marshfield. Dmand AI links Dr. Warner to 4 more hospitals.
What medical group is Dr. John J. Warner part of?
Dr. Warner is linked to Marshfield Clinic Health System. Dmand AI links Dr. Warner to 3 more medical groups.
Does Dr. John J. Warner accept Medicare?
Yes. CMS data shows Dr. Warner billed Medicare for 83 services in 2024, and Dr. Warner accepts Medicare assignment.
What is Dr. John J. Warner's MIPS score?
Dr. Warner's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. John J. Warner see?
CMS counts 167 Medicare patients who saw Dr. Warner in 2024, with an average age of 73.
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What services does Dr. John J. Warner bill to Medicare?
In 2024, Dr. Warner's most billed Medicare services were diagnostic imaging (70450), diagnostic imaging (72100) and diagnostic imaging (70553).
Where did Dr. John J. Warner go to medical school?
Dr. Warner graduated from University of Wisconsin School of Medicine in 1983.
Has Dr. John J. Warner received payments from drug or device companies?
CMS Open Payments shows $12 in general payments to Dr. Warner from 1 company from 2016 to 2016. The largest total came from Siemens Medical Solutions USA, Inc.
How long has Dr. John J. Warner been practicing?
Dr. Warner graduated from medical school in 1983, 43 years ago.
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