Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Brian John Parker, MD

Individual provider Diagnostic Radiology Physician · NPI 1841405495

Brian John Parker, MD practises Diagnostic Radiology in Marshfield, Wisconsin. Qualified in 2001, 25 years ago. Practices with Marshfield Clinic Inc, a 212-clinician group and accepts Medicare assignment. Licensed in Michigan and Wisconsin.

Years since qualifying
25
Licensed in
MI, WI
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1000 N Oak Ave 2B Dept OF Radiology
Marshfield, WI 54449-5703
Phone: (715) 389-3555
Fax: (715) 389-7670
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 45621 (WI)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 45621020 (WI)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 4301082600 (MI)

Record details

NPI number1841405495
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 14, 2007
Last updated in NPPESJune 13, 2023
Certification dateJune 13, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Marshfield Clinic Inc — 212 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations12 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,572
Services billed 2,480 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Marshfield Medical Center - Minocqua Hospital · Minocqua, WI · listed as Mchs Hospitals Inc
  • Marshfield Medical Center - Rice Lake Hospital · Rice Lake, WI · listed as Lakeview Medical Center Inc of Rice Lake
  • Marshfield Medical Center Hospital · Marshfield, WI
  • Marshfield Medical Center - Eau Claire Hospital · Eau Claire, WI
  • Marshfield Medical Center - Weston Hospital · Weston, WI

Colleagues at Marshfield Clinic Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 212 clinicians in the practice; 12 are shown here.

Other providers in Marshfield