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IVAN B. SCHALLER MD
NPI 1306967849
Internal Medicine in Wausau, WI

Active since April 03, 2007PECOS Enrolled
2727 PLAZA DR, WAUSAU, WI 54401(715) 847-3000 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ivan B. Schaller Md NPPES

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

IVAN B. SCHALLER MD (NPI 1306967849) is an individual internal medicine provider in Wausau, Wisconsin, licensed in Wisconsin (28071) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1306967849
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameIVAN B. SCHALLERCredential: MD
Location Address2727 PLAZA DRWausau, WI 54401-4129
Mailing Address1000 N Oak AveMarshfield, WI 54449-5703 · (715) 387-5511
Phone(715) 847-3000
Sole ProprietorNo
Enumeration DateApril 3, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1306967849 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 28071
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2727 PLAZA DR, Wausau, WI 54401
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Other Identifiers 2

Medicare UPINB56326
Medicaid30772100WI

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ivan B. Schaller Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

2

Medicare enrollment records show Ivan Schaller reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mchs Hospitals Inc
Same address
Internal Medicine
2727 PLAZA DR
Wausau, WI 54401
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,476 clinicians in this Medicare group
NPI 1164159109 (715) 847-3000
Marshfield Clinic Inc
33 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

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54401 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.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers19 claims38 services$4.30 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
7 suppliers16 claims19 services$1.01 avg. paid by Medicare
Wheelchair accessory, headrest, cushioned, any type, including fixed mounting hardware, each E0955
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$13.70 avg. paid by Medicare
Wheelchair accessory, manual swingaway, retractable or removable mounting hardware for joystick, other control interface or positioning accessory E1028
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$13.99 avg. paid by Medicare
Manual adult size wheelchair, includes tilt in space E1161
DME-Wheelchairs · category DD000N
1 supplier12 claims12 services$173.29 avg. paid by Medicare
Wheelchair accessory, manual semi-reclining back, (recline greater than 15 degrees, but less than 80 degrees), each E1225
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$30.54 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MS. JACQUELYN FORBES KEARNS MS,ARNP-C
Nurse Practitioner (Adult Health)
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3000
ELAINE J. OLSEN CRNA
Nurse Anesthetist, Certified Registered
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3000
SWATI S BISWAS MD
Physical Medicine & Rehabilitation
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3042
HEATHER L. LANDWEHR PA
Physician Assistant
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3000
JOHN F WEBB MD
Emergency Medicine
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3434
DR. ARTI KHURANA MD
Internal Medicine (Rheumatology)
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3000
SARAH S NIELSEN DO
Radiology (Diagnostic Radiology)
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3000
THOMAS CRAIG HUPY M.D.
Emergency Medicine
2727 PLAZA DR
WAUSAU, WI 54401
Marathon County (715) 847-3000

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 Ivan Schaller's NPI number?

The NPI number for Ivan Schaller is 1306967849. It was assigned to this individual provider in the NPPES registry on April 3, 2007.

Where is Ivan Schaller located?

Ivan Schaller practices at 2727 Plaza Dr, Wausau, WI 54401. The listed phone number is (715) 847-3000.

What is Ivan Schaller's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Ivan Schaller enrolled in Medicare?

Yes. Ivan Schaller is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Ivan Schaller's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ivan Schaller reassigns Medicare benefits to 2 organizations: Mchs Hospitals Inc (Wausau, WI) and Marshfield Clinic Inc (Marshfield, 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 Ivan Schaller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ivan Schaller was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.