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BRIAN H EWERT MD
NPI 1306946256
Internal Medicine - Nephrology in Marshfield, WI

Active since September 22, 2006PECOS EnrolledAccepts Medicare Assignment
1000 N OAK AVE, MARSHFIELD, WI 54449(715) 387-5345 Get Directions Write a Review

NPPES record last updated: March 10, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 10, 2025, Oct 15, 2020 (2 updates tracked since 2020).

About Brian H Ewert Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BRIAN H EWERT MD (NPI 1306946256) is an individual nephrology provider in Marshfield, Wisconsin, licensed in Wisconsin (32983) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and is a graduate of Northwestern University Feinberg Medical School (1985).

NPPES Registry Identity

NPI1306946256
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameBRIAN H EWERTCredential: MD
Location Address1000 N OAK AVEMarshfield, WI 54449
Mailing Address1000 N Oak AveMarshfield, WI 54449-5777
Phone(715) 387-5345
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 1985
Enumeration DateSeptember 22, 2006
Last NPPES UpdateMarch 10, 20252 updates tracked since enumeration
NPPES CertifiedMarch 10, 2025
✔ NPI 1306946256 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in WI · 32983
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1000 N OAK AVE, Marshfield, WI 54449
Open in Google Maps ↗

Other Identifiers 1

Medicaid31805100WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Sanford Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Brian H Ewert Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9537117361
PECOS Enrollment IDI20050110000044
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Brian Ewert reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Marshfield Clinic Inc
1.2 mi
Clinic/Center
1000 N OAK AVE
Marshfield, WI 54449
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,540 clinicians in this Medicare group
NPI 1952347981 (715) 387-5511
Mchs Hospitals Inc
1.2 mi
Clinic/Center
1000 N OAK AVE
Marshfield, WI 54449
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,476 clinicians in this Medicare group
NPI 1093221434 (715) 387-5511
Lakeview Medical Center Inc Of Rice Lake
85 mi
Clinic/Center
806 2ND ST
Chetek, WI 54728
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,616 clinicians in this Medicare group
NPI 1659008605 (715) 924-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Marshfield Medical Center

Acute Care Hospitals · Marshfield, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520037
Location611 St Joseph AveMarshfield, WI 54449 · Wood County
Emergency services Birthing friendly

Marshfield Medical Center - Minocqua

Acute Care Hospitals · Minocqua, WI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520212
Location9576 Highway 70Minocqua, WI 54548 · Oneida County
Emergency services Birthing friendly

Flambeau Hospital

Critical Access Hospitals · Park Falls, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521325
Location98 Sherry AvePark Falls, WI 54552 · Price County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54449 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALISON RAE SAMPSON D.O.
Obstetrics & Gynecology
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5161
TAMARA L. LEAHY NP
Nurse Practitioner
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (800) 782-8581
SAMANTHA ELAINE MOORE RD, CD, CDCES
Dietitian, Registered
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 389-7464
ROBERT BUNDY
Student in an Organized Health Care Education/Training Program
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
EUGENE H. LARSON PA
Physician Assistant
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5245
JAMES SKIBBA CRNA
Nurse Anesthetist, Certified Registered
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-7179
KENNETH E ENGELHART MD
Internal Medicine
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5704
KRISTIN M GERNDT MD
Radiology (Vascular & Interventional Radiology)
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 389-3474

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Brian Ewert's NPI number?

The NPI number for Brian Ewert is 1306946256. It was assigned to this individual provider in the NPPES registry on September 22, 2006.

Where is Brian Ewert located?

Brian Ewert practices at 1000 N Oak Ave, Marshfield, WI 54449. The listed phone number is (715) 387-5345.

What is Brian Ewert's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Brian Ewert enrolled in Medicare?

Yes. Brian Ewert is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Brian Ewert's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Brian Ewert reassigns Medicare benefits to 3 organizations: Marshfield Clinic Inc (Marshfield, WI), Mchs Hospitals Inc (Marshfield, WI) and Lakeview Medical Center Inc Of Rice Lake (Chetek, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Brian Ewert's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Brian Ewert accept?

Health plans from Anthem Blue Cross and Blue Shield and Sanford Health Plan list Brian Ewert as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Brian Ewert affiliated with any hospitals?

According to CMS data, Brian Ewert is affiliated with Marshfield Medical Center, Marshfield Medical Center - Minocqua and Flambeau Hospital.

When was this NPI record last updated?

The NPPES record for Brian Ewert was last updated on March 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.