Dr. John D. Allendorf
- Gender: Male
- Experience: 24 years
- Graduated from: Columbia University College Of Physicians And Surgeons
- Graduation year: 1997
- Sole propriator: Yes
- NPI: 1740364397
Dr. John D. Allendorf M.D.
Surgeon
He is located at 120 Mineola Boulevard Suite 320 in Mineola, NY 11501. Can help patients with the following: Achalasia, Appendicitis, Boils, Enlarged Spleen, Pilonidal Cyst, Sebaceous Cyst. His National Provider Identifier (NPI) number is 1740364397. Appointment can be made via the phone number (516) 663-3300. He is affiliated with 4 practices and 1 hospitals.
Conditions treated
Dr. John Dennis Allendorf, being an surgeon, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John D. Allendorf.
- Achalasia
- Anal Fissure
- Appendicitis
- Boils
- Cancer
- Colon Cancer
- Crohn's Disease
- Cyst
- Diverticulosis
- Enlarged Spleen
- Esophageal Cancer
- Gallstones
- Gangrene
- Heart Disease
- Hemorrhoids
- Hernia
- Inflammatory Bowel Disease (IBD)
- Lymphedema
- Pancreatitis
- Peptic Ulcer
- Pilonidal Cyst
- Sebaceous Cyst
- Ulcerative Colitis
Procedures Performed by Dr. John D. Allendorf
Insurances Accepted by Dr. John D. Allendorf
- Medicare
Medicare Enrollment
Dr. John D. Allendorf is enrolled to bill Medicare as a Practitioner - General Surgery .
Bills through: New York University
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and is not a comment on insurance accepted, quality, outcomes, or board certification.
Payments received
Drug payment
| Plasma Surgical | $1575 |
| AbbVie | $180 |
| Hospira | $42 |
Other
| Consulting | $1500 |
| Food and Beverage | $338 |
| Travel and Lodging | $75 |
Studies
COLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated in 1997Affiliated practices
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- Address: 120 Mineola Boulevard Mineola, 11501, NY
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Questions & Answers
Has Dr. John Dennis Allendorf affiliation with hospitals?
Dr. John Dennis Allendorf is affiliated with NEW YORK UNIVERSITY LANGONE MEDICAL CENTER.
Does Dr. John Dennis Allendorf accept patients with Medicare?
Yes, Dr. John Dennis Allendorf accepts patients with Medicare.
Does Dr. John Dennis Allendorf have affiliation with practices?
Dr. John Dennis Allendorf is affiliated with Beach Internal Medicine. For the full list of practices see this list.
What conditions does Dr. John Dennis Allendorf treat?
Dr. John Dennis Allendorf provides treatment for Achalasia, Appendicitis, Boils, Enlarged Spleen, Pilonidal Cyst, Sebaceous Cyst. For the full list see this list.
Where can you meet with Dr. John Dennis Allendorf?
Dr. John Dennis Allendorf's office is located at 120 Mineola Boulevard Suite 320 in Mineola, NY 11501.