TUMOR INSTITUTE RADIATION ONCOLOGY GROUP LLP
NPI 1184632572
Radiology - Radiation Oncology in Seattle, WA
About Tumor Institute Radiation Oncology Group Llp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TUMOR INSTITUTE RADIATION ONCOLOGY GROUP LLP (NPI 1184632572) is a healthcare organization registered as a radiation oncology in Seattle, Washington and active in the NPI registry since August 2006. The organization maintains a secondary practice location in Seattle and lists Mary Monahan, Administrator, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Tumor Institute Radiation Oncology Group Llp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
22Medicare enrollment records show 22 clinicians reassign Medicare billing to Tumor Institute Radiation Oncology Group LLP, which bills Medicare for the services they deliver. Of these, 7 practice at this address and 15 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 2
Nearest to this location (20)
See all 22Seattle, WA 98104
Seattle, WA 98104
Seattle, WA 98104
Seattle, WA 98104
Seattle, WA 98122
Seattle, WA 98133
Seattle, WA 98133
Renton, WA 98055
Edmonds, WA 98026
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Tumor Institute Radiation Oncology Group LLP's NPI number?
The NPI number for Tumor Institute Radiation Oncology Group LLP is 1184632572. It was assigned to this organization in the NPPES registry on August 3, 2006.
Where is Tumor Institute Radiation Oncology Group LLP located?
Tumor Institute Radiation Oncology Group LLP is located at 1221 Madison St First Floor, Seattle, WA 98104. The listed phone number is (206) 386-2323.
What is Tumor Institute Radiation Oncology Group LLP's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Tumor Institute Radiation Oncology Group LLP enrolled in Medicare?
Yes. Tumor Institute Radiation Oncology Group LLP is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Tumor Institute Radiation Oncology Group LLP?
According to the CMS Revalidation Reassignment List (October 2026 release), 22 clinicians in 2 Medicare specialties reassign their Medicare billing to Tumor Institute Radiation Oncology Group LLP. A 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 the clinician's services. The largest specialties are Radiation Oncology (20) and Nurse Practitioner (2). Of these, 7 practice at this address and 15 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Tumor Institute Radiation Oncology Group LLP accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Tumor Institute Radiation Oncology Group LLP 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.
When was this NPI record last updated?
The NPPES record for Tumor Institute Radiation Oncology Group LLP was last updated on July 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Tumor Institute Radiation Oncology Group Llp · NPI 1184632572
Radiation Oncology organization in Seattle, Washington. Organization record, active in the CMS NPPES registry since August 3, 2006.
## Identity
- **NPI:** 1184632572 (Entity type: Organization)
- **Enumerated:** August 3, 2006
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **Organization subpart:** No
- **Authorized official:** Mary Monahan, ADMINISTRATOR
## Practice location
- **Address:** 1221 MADISON ST, FIRST FLOOR, Seattle, WA 98104-3589
- **Phone:** (206) 386-2323 · **Fax:** (206) 385-6150
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 22 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Radiation Oncology (20), Nurse Practitioner (2); 7 practice at this address and 15 within 10 miles; [full list](https://npiprofile.com/npi/1184632572/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 5, 2022
- **Other identifiers:** Other CS0846 (WA); Medicaid 7805203 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1184632572) · Data from the CMS NPPES public registry.