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Dr. John Allendorf, MD

Dr. John Allendorf, MD

Surgical Oncology*
25+ years of experience

Dr. John Allendorf, MD is a surgical oncologist in Mineola, NY and has over 25 years of experience in the medical field. He graduated from Columbia University Vagelos College of Physicians and Surgeons in 1997. He is affiliated with NYU Langone Hospitals. He is accepting new patients.

4.5 Star Rating
Based on 19 reviews 4.5 Star Rating (19 reviews)

Practice

120 Mineola Blvd Ste 320 Mineola, NY 11501

Make an Appointment

(516) 663-3300

Hospital Highlight

Dr. Allendorf is affiliated with NYU Langone Hospitals New York, a highly rated hospital.

At a Glance

  • Area of Expertise
    Dr. Allendorf specializes in the area of General Surgery. • See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Practices at Top Hospital
    America's 100 Best Hospitals Award™ • See hospitals
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. • See hospitals
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Dr. Allendorf's Reviews

Likelihood to recommend Dr. Allendorf

4.5

19 ratings, 7 with a written review
5 Star
79%
79%
4 Star
11%
11%
3 Star
0%
0%
2 Star
0%
0%
1 Star
11%
11%

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RecentHighestLowestMost Helpful
What went well
No results
What could be improved
  • I didn't feel respected
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
  • Long wait times
1 person found this helpful
Helpful
Christine Dayal – Aug 27, 2024
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Theresa G – Oct 10, 2022
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Karen Umbach – Jul 27, 2022
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What went well
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Jan 19, 2021
×Post a ResponseAre you Dr. John Allendorf, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
3 people found this helpful
Helpful
Cheyenne N. in Wesbury , NY – Jan 16, 2019
×Post a ResponseAre you Dr. John Allendorf, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
7 people found this helpful
Helpful
Commack NY – May 19, 2016
×Post a ResponseAre you Dr. John Allendorf, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
15 people found this helpful
Helpful
colleen coro in Freeport, NY – Dec 18, 2015
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Leave a review

How was your experience with Dr. Allendorf?

Know Before You Go

About Me

biography

As a surgeon who has pioneered several robotic and minimally invasive treatments for patients

who were once considered untreatable, I enjoy the intellectual and technical challenges that come with complex diseases and surgical procedures. ...read more

  • Surgical Oncology

  • General Surgery

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Columbia U/ny Pres Hospital

    Fellowship Hospital, 2003

  • New York Presbyterian Hospital Columbia University Medical Center

    Residency Hospital, 2002

  • Columbia Presbyterian Medical Center

    Internship Hospital, 1998

  • Ny Pres Hospital

    Internship Hospital, 1998

  • Columbia University Vagelos College Of Physicians And Surgeons

    Medical School, 1997

  • John's Hopkins University

    Undergraduate School, 1992
American Board of Medical Specialties®
American Board of Surgery®
- 
General Surgery
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Learn more about medical license public record check

Focus on Breast Cancer

Locations

Practice

Winthrop Surgery Associates120 Mineola Blvd Ste 320 Mineola, NY 11501
1

Practice

Nyu Langone Bariatric Surgery Associates-Patchogue157 E Woodside Ave Patchogue, NY 11772
2
  • Call
  • Fax
  • Hours
    • Mon: closed
    • Tue: 8:30am - 4:30pm
    • Wed: closed
    • Thu: closed
    • Fri: closed
    • Sat: closed
    • Sun: closed
  • Directions

Affiliated Hospitals

  • NYU Langone Hospitals

    550 1st Ave
    New York, NY 10016
    Recipient of 62
    hospital awards

    America's 100 Best Hospitals Award™ (2025, 2024, 2023)

    Top 2% in the nation for consistently delivering clinical quality year over year

    America's 250 Best Hospitals Award™ (2025, 2024, 2023)

    Top 2% in the nation for consistently delivering clinical quality year over year

    View all awards

    How patients felt about the care they received at this hospital.

    85%
    Patients said they were given information about recovering at home

    1% higher than the national average

    78%
    Patients said that nurses always listened to them and explained things well

    3% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality