What is John Warner's specialty?

John Warner (NPI 1831291871) is a Medicare-billing provider whose primary specialty is Diagnostic Radiology in Marshfield, WI.

Where does John Warner practice?

John Warner practices in Marshfield, WI, based on the location reported in the CMS Medicare provider datasets for NPI 1831291871.

How much does Medicare pay John Warner?

John Warner (NPI 1831291871) received approximately $8K in total Medicare Part B payments, serving 167 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1831291871

John WarnerMD

PRACTICEMARSHFIELD CLINICSee all providers at this practice →

Diagnostic RadiologyMarshfield, WII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$2K

Peer benchmark

Total Medicare services vs. 749 Diagnostic Radiology providers in WI — bottom quintile (cohort median 2,525).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

Final MIPS score

80.6

Quality

55.5

Cost

71.5

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.23%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where John Warner's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 60 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ST JOSEPH'S HOSPITAL OF MARSHFIELD, INC	154	280
LAKEVIEW MEDICAL CENTER, INC. OF RICE LAKE	111	237
ASCENSION ST CLARE'S HOSPITAL, INC	53	72
Bao Bui Diagnostic Radiology · Nashville, TN	52	72
HOWARD YOUNG MEDICAL CENTER INC OF WOODRUFF WISCONSIN	46	59
DE CLUTE, MARK	45	55
DIAGNOSTIC & TREATMENT CENTER, LLC	43	88
Joshua Larson Diagnostic Radiology · Eau Claire, WI	41	56
Mathew So Diagnostic Radiology · Roseville, MN	35	51
Mark Hinson Diagnostic Radiology · Marshfield, WI	34	49
Aaron Dagit Diagnostic Radiology · Marshfield, WI	33	51
BHATTACHARJEE, NANDITA	32	40

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events