Tumor Institute Radiation Oncology Group LLP
NPI 1184632572 · Radiation Oncology Physician · Seattle, WA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tumor Institute Radiation Oncology Group LLP is a Radiation Oncology Physician organization in Seattle, WA (NPI 1184632572).
Provider details
- NPI number
- 1184632572
- Entity type
- Organization
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mary Monahan, Administrator(206) 320-7129
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 550 17th Ave Ste A10Seattle, WA 98122-5789Phone: (206) 320-7130Fax: (206) 320-7137
Registry dates
- Enumerated
- 2006-08-03
- Last updated
- 2022-07-05
- Certified
- 2022-05-23
Frequently asked questions
- What is Tumor Institute Radiation Oncology Group LLP's NPI number?
- Tumor Institute Radiation Oncology Group LLP's National Provider Identifier (NPI) is 1184632572, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Tumor Institute Radiation Oncology Group LLP?
- Tumor Institute Radiation Oncology Group LLP is classified in the NPPES registry as Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Tumor Institute Radiation Oncology Group LLP located?
- Tumor Institute Radiation Oncology Group LLP's practice location on file with NPPES is 1221 Madison St, Seattle, WA 98104-3589.
- What is Tumor Institute Radiation Oncology Group LLP's phone number?
- The practice phone number listed in the NPPES registry for Tumor Institute Radiation Oncology Group LLP is (206) 386-2323.
- Does Tumor Institute Radiation Oncology Group LLP accept Medicare?
- Tumor Institute Radiation Oncology Group LLP is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Tumor Institute Radiation Oncology Group LLP?
- The authorized official listed on Tumor Institute Radiation Oncology Group LLP's NPPES record is Mary Monahan, Administrator. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Tumor Institute Radiation Oncology Group LLP's NPI active?
- Yes — Tumor Institute Radiation Oncology Group LLP's NPI (1184632572) is active in the NPPES registry as of the last update on 2022-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.