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John Blasko, M.D.
NPI 1194748715 · Radiation Oncology Physician · Seattle, WA
John Blasko, M.D. is a Radiation Oncology Physician provider in Seattle, WA (NPI 1194748715).
Provider details
- NPI number
- 1194748715
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00016098 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
1 documented practice location
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
1101 Madison, Suite 1101
C/O Seattle Prostate Institute
Seattle, WA 98104
Phone: (206) 215-2480
Fax: (206) 215-2481
Street-level locationGet directions
Mailing address
Po Box 3972
Seattle, WA 98124-3972
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2008-01-16
Frequently asked questions
- What is John Blasko's NPI number?
- John Blasko's National Provider Identifier (NPI) is 1194748715, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Blasko's specialty?
- John Blasko is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Blasko located?
- John Blasko's practice location on file with NPPES is 1101 Madison, Suite 1101, Seattle, WA 98104.
- What is John Blasko's phone number?
- The practice phone number listed in the NPPES registry for John Blasko is (206) 215-2480.
- Is John Blasko's NPI active?
- Yes — John Blasko's NPI (1194748715) is active in the NPPES registry as of the last update on 2008-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.