DR. THOMAS OLIVER D.O
NPI 1083069470
Internal Medicine - Hematology & Oncology in Wausau, WI
About Dr. Thomas Oliver D.o NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THOMAS OLIVER D.O (NPI 1083069470) is an individual hematology & oncology provider in Wausau, Wisconsin, licensed in Arizona (008380) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Aspirus Stevens Point Hospital & Clinics, Inc., and is a graduate of Lake Erie College Of Osteopathic Medicine, Erie (2016).
NPPES Registry Identity
Specialties & Licenses 2
Accepted 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
Dr. Thomas Oliver D.o 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.
Medicare Billing Reassignments
7Medicare enrollment records show Thomas Oliver reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Wausau, WI 54401
- Reassigned Medicare billing, Wisconsin enrollment
- 633 clinicians in this Medicare group
Wausau, WI 54401
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Langlade Hospital - Hotel Dieu Of St Joseph Of Antigo Wisconsin
- Also billed through NPI 1821151366 (Wisconsin)
- 321 clinicians in this Medicare group
Wausau, WI 54401
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Aspirus Riverview Hospital & Clinics Inc
- 397 clinicians in this Medicare group
Athens, WI 54411
- Reassigned Medicare billing, Wisconsin enrollment
- 376 clinicians in this Medicare group
Wittenberg, WI 54499
- Reassigned Medicare billing, Wisconsin enrollment
- 935 clinicians in this Medicare group
Stevens Point, WI 54481
- Reassigned Medicare billing, Wisconsin enrollment
- 619 clinicians in this Medicare group
Newtown Square, PA 19073
- Reassigned Medicare billing, Pennsylvania enrollment
- 1,638 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Aspirus Stevens Point Hospital & Clinics, Inc.
Acute Care Hospitals · Stevens Point, WIAspirus Rhinelander Hospital
Acute Care Hospitals · Rhinelander, WIAspirus Wausau Hospital
Acute Care Hospitals · Wausau, WIAspirus Stanley Hospital
Critical Access Hospitals · Stanley, WIAspirus Medford Hospital & Clinics, Inc
Critical Access Hospitals · Medford, WIPhysician 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.
Other Providers at the Same Location NPPES 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WAUSAU, WI 54401
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 Thomas Oliver's NPI number?
The NPI number for Thomas Oliver is 1083069470. It was assigned to this individual provider in the NPPES registry on May 4, 2016.
Where is Thomas Oliver located?
Thomas Oliver practices at 215 N 28th Ave, Wausau, WI 54401. The listed phone number is (715) 847-2866.
What is Thomas Oliver's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Thomas Oliver enrolled in Medicare?
Yes. Thomas Oliver 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 Thomas Oliver's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Oliver reassigns Medicare benefits to 7 organizations: Aspirus Wausau Hospital, Inc. (Wausau, WI), Langlade Memorial Hospital Hotel Dieu Of St Joseph (Wausau, WI), Aspirus Medical Group, Inc. (Wausau, WI), Aspirus Medford Hospital & Clinics, Inc. (Athens, WI), Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. (Wittenberg, WI) and 2 more organizations, listed in the Medicare section above. 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 Thomas Oliver's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Oliver accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, HealthPartners and Security Health Plan list Thomas Oliver 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 Thomas Oliver affiliated with any hospitals?
According to CMS data, Thomas Oliver is affiliated with Aspirus Stevens Point Hospital & Clinics, Inc., Aspirus Rhinelander Hospital, Aspirus Wausau Hospital, Aspirus Stanley Hospital and Aspirus Medford Hospital & Clinics, Inc.
When was this NPI record last updated?
The NPPES record for Thomas Oliver was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 60 days 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.
# Dr. Thomas Oliver, D.O · NPI 1083069470
Hematology & Oncology physician in Wausau, Wisconsin. Individual provider, active in the CMS NPPES registry since May 4, 2016.
## Identity
- **NPI:** 1083069470 (Entity type: Individual)
- **Enumerated:** May 4, 2016
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 008380 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 215 N 28TH AVE, Wausau, WI 54401-4100
- **Phone:** (715) 847-2866
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Aspirus Wausau Hospital, Inc. (NPI 1356576490, Wausau, WI); Langlade Memorial Hospital Hotel Dieu Of St Joseph (NPI 1871630863, Wausau, WI); Aspirus Medical Group, Inc. (NPI 1689976474, Wausau, WI); Aspirus Medford Hospital & Clinics, Inc. (NPI 1760912919, Athens, WI); Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. (NPI 1114696507, Wittenberg, WI); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Lake Erie College Of Osteopathic Medicine, Erie, class of 2016
## Record status
- **NPPES last updated:** August 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1083069470) · Data from the CMS NPPES public registry.