Dr. John Kosiak, MD


Radiation Oncology | Male

Minneapolis Radiation Oncology 11850 Blackfoot St NW Ste 150 Coon Rapids, MN 55433 Get Directions
Dr. John Kosiak, MD
Dr. John Kosiak, MD is a radiation oncology doctor who practices in Coon Rapids, MN. He is 61 years old and has been practicing for 35 years. Dr. Kosiak is affiliated with North Memorial Medical Center and AllinaHealth - Mercy Hospital.

Learn about this doctor

Dr. Kosiak's Experience

Experience Match

See how Dr. Kosiak's experience matches your preferences.


For the best healthcare for your needs, choose a doctor who specializes in your medical condition.

Board Certifications

Board certification indicates that a doctor is highly qualified in the medical field in which they practice.

Conditions Treated

Check to see that this provider treats your medical condition.

Procedures Performed

Check to see that this provider performs the procedure that you need.

Background Check

Check to see if your provider has any malpractices, board actions, or sanctions.


Learn more about where this provider went to medical school, residency, and more.

Awards & Recognition

View information about special awards and recognition for this provider.

Languages Spoken

Check to see what languages this provider and/or staff speak.

Memberships & Professional Affiliations

View memberships and affiliations associated with this provider.

Visiting Dr. Kosiak

Affiliated Hospitals

Hospital Quality
Check out the quality of care at the 2 hospitals where Dr. Kosiak has admitting privileges.

Dr. Kosiak's Reviews

Likelihood of recommending Dr. Kosiak to family and friends
based on 1 review (1 with a comment)
Dr. Kosiak's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    31 to 45 minutes
Patient Comments (1)
in Minneapolis, MN |
If I could leave 0 stars, I would, but I can't. He is absoulutely the worst physciain I have ever encountered in our cancer journey. He is never in the office when you need him and he is never on time. He should really consider retirement and find something productive to do with his life. Avoid him at all costs. He is the worst. The ones doing the real work are wonderful though. Nancy at the front desk, nurse Yvonne and all the other nurses and staff are fantastic. Get another M.D.
Have you seen Dr. John Kosiak, MD?
Are you Dr. Kosiak?
Make it easy for patients to share their feedback. Also manage your personalized profile!

Compare Dr. Kosiak

Compare this Doctor
View other doctors with similar experience to find the right doctor for you.
View all 10 matches

Dr. Kosiak's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Radiation Oncology
  •  Board certified in Therapeutic Radiology
  •  Malpractice claims in Minnesota not available
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Kosiak has no media or publications listed.

Background Check

  • n/a
    Malpractice Claims not available

    Healthgrades does not collect malpractice information for Minnesota.

    What is medical malpractice
  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions

Board Certifications

Why It Matters: Dr. Kosiak's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Therapeutic Radiology

Conditions Treated

  • Cancer
  • Gynecologic Cancer
  • Vulvar Cancer


  • Medical School
    Univ Of Mn Med Sch

    Graduated in 1982

  • Internship Hospital
    St Paul Ramsey Med Ctr

    Completed in 1983

  • Residency Hospital
    University Of Minnesota

    Completed in 1986

Languages Spoken

  • English

Memberships &
Professional Affiliations

Dr. Kosiak does not have any memberships or affiliations listed. If you are Dr. Kosiak and would like to add memberships or affiliations, please update your free profile.


  • Radiation Oncology
  • Radiology

Procedures Performed

Dr. Kosiak does not have any procedures listed. If you are Dr. Kosiak and would like to add procedures you perform, please update your free profile.