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Dr. John C. Blasko, MD

  • Seattle, WA
  • Radiation oncologist
NPI1194748715
Publications
1
Industry payments
$287,210
State license
1
Year NPI issued
2006
Practice address
1101 Madison, Suite 1101, Seattle, WA 98104
Practice phone
Call (206) 215-2480
Professional email
Get professional email
Personal email
Get personal email
Mobile number
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Social profiles

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Dr. John C. Blasko is a radiation oncologist in Seattle, Washington

Dr. Blasko practices in Seattle, Washington.

Dr. Blasko's NPI, 1194748715, was assigned on July 25, 2006. Dr. Blasko holds Washington license MD00016098.

NPI and contact details
NPI
1194748715NPI Registry (opens in a new tab)
NPI enumeration date
July 25, 2006
NPI status
Active
Practice phone
(206) 215-2480
Professional email
Get email
Personal email
Get email
Mobile number
Get number

Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data

Dr. John C. Blasko's practice address is in Seattle, Washington

Dr. Blasko's practice address in the NPI Registry is 1101 Madison, Suite 1101, Seattle, WA 98104. The practice phone is (206) 215-2480.

  • NPI Registry address
    1101 Madison, Suite 1101, Seattle, WA 98104Phone(206) 215-2480

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dmand AI tracks the EHR system at Dr. John C. Blasko's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Blasko practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Dr. Blasko's practiceAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. John C. Blasko is one of 162 radiation oncologists in Washington

Radiation oncology is Dr. Blasko's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Blasko is licensed in Washington.

Specialties and state licenses

  • Radiation oncology, WashingtonPrimaryLicense MD00016098 · taxonomy 2085R0001X

Radiation oncologists near Dr. Blasko

Counts of radiation oncologists with a Dmand AI profile, by place and practice. Each opens the list.

162radiation oncologists in Washington66radiation oncologists in Seattle

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. John C. Blasko has 1 publication on record

Dmand AI links 1 paper to Dr. Blasko in 2016. Dr. Blasko's most frequent co-authors are Richard G. Stock, MD and Michael J. Zelefsky, MD.

Papers1

Dr. Blasko's most frequent co-authors

Recent publications by Dr. Blasko

See all 1 publications and co-authors

See who Dr. Blasko researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Blasko works with, so you can find a warm path to the right radiation oncologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. John C. Blasko received $287,210 in industry payments from 2016 to 2022

CMS Open Payments shows 36 general payments to Dr. Blasko from 1 drug or device company from 2016 to 2022. Consulting fees make up the largest share, 96% of the total. Theragenics Corporation paid the most, $287,210.

General payments to Dr. Blasko by program year, 2016 to 2022

General payments to Dr. Blasko by kind, 2016 to 2022

$287.2Kin total
  • Consulting fees$275,00096%
  • Travel and lodging$9,0383%
  • Speaker and faculty fees$1,1300%
  • Education$1,0800%
  • Food and beverage$9620%

Companies that paid Dr. Blasko the most, 2016 to 2022

Share is of all general payments to this clinician.

See all payments to Dr. Blasko

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Dr. John C. Blasko's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. John C. Blasko

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. John C. Blasko's NPI number?

Dr. John C. Blasko's NPI number is 1194748715. It was assigned on July 25, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. John C. Blasko?

Dr. John C. Blasko is a radiation oncologist in Seattle, Washington. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).

Where does Dr. John C. Blasko practice?

Dr. Blasko practices at 1101 Madison, Suite 1101, Seattle, WA 98104.

What is Dr. John C. Blasko's office phone number?

The practice phone on file for Dr. Blasko is (206) 215-2480.

What is Dr. John C. Blasko's medical license number?

Dr. Blasko holds Washington license MD00016098.

Has Dr. John C. Blasko received payments from drug or device companies?

CMS Open Payments shows $287,210 in general payments to Dr. Blasko from 1 company from 2016 to 2022. The largest total came from Theragenics Corporation.

How long has Dr. John C. Blasko been practicing?

Dr. Blasko's NPI was assigned in 2006.

Does Dr. John C. Blasko do research?

Dmand AI links 1 publication to Dr. Blasko.

Who does Dr. John C. Blasko publish with?

Dr. Blasko's most frequent co-authors are Richard G. Stock, MD (1 shared paper) and Michael J. Zelefsky, MD (1 shared paper).

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