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DR. JOHN DENNIS ALLENDORF M.D.
NPI 1740364397
Surgery - Surgical Oncology in Mineola, NY

Active since October 24, 2006PECOS EnrolledAccepts Medicare Assignment
84.47/100
CMS Quality Rating
120 MINEOLA BLVD, SUITE 320, MINEOLA, NY 11501(516) 663-3300(516) 663-2136 Get Directions Write a Review

NPPES record last updated: May 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 13, 2026, Dec 20, 2021, Dec 3, 2021 and 1 more (4 updates tracked since 2021).

About Dr. John Dennis Allendorf M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN DENNIS ALLENDORF M.D. (NPI 1740364397) is an individual surgical oncology provider in Mineola, New York, licensed in New York (212487) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Nyu Langone Hospitals, and is a graduate of Columbia University College Of Physicians And Surgeons (1997).

NPPES Registry Identity

NPI1740364397
Entity TypeIndividualMale
Primary Taxonomy2086X0206X
Provider Legal NameDR. JOHN DENNIS ALLENDORFCredential: M.D.
Location Address120 MINEOLA BLVD, SUITE 320Mineola, NY 11501-4064
Mailing Address120 Mineola Blvd, Suite 320Mineola, NY 11501-4064 · (516) 663-3300 · Fax (516) 663-2136
Phone(516) 663-3300
Fax(516) 663-2136
Sole ProprietorYes
Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 1997
Enumeration DateOctober 24, 2006
Last NPPES UpdateMay 13, 20264 updates tracked since enumeration
NPPES CertifiedMay 13, 2026
✔ NPI 1740364397 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgery · Surgical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2086X0206X
License✔ Licensed in NY · 212487
Definition
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
Also ListedSurgeryTaxonomy 208600000X · License 212487 (NY)
120 MINEOLA BLVD, Mineola, NY 11501
Open in Google Maps ↗

Other Identifiers 1

Medicaid02288659NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Dennis Allendorf M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1153516646
PECOS Enrollment IDI20101110000330
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
74 services74 patients
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202
This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.
64 services64 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
44 services38 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
40 services39 patients
Removal or exploration of parathyroid glands 60500
The procedure for removal or exploration of parathyroid glands involves a surgeon making a small incision in the neck to locate and remove one or more of the tiny parathyroid glands. These glands control calcium levels in the body. This procedure helps treat conditions like hyperparathyroidism.
29 services29 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
19 services19 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Nyu Langone Hospitals

Acute Care Hospitals · New York, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330214
Location550 First AvenueNew York, NY 10016 · New York County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$203.53 typical visit price
range $67.40 – $203.53
Typical copayment $50.88 (range $16.85 – $50.88)
Most-billed visit code 99205
Established Patient
$83.44 typical visit price
range $21.66 – $164.45
Typical copayment $20.86 (range $5.41 – $41.11)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

84.47/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality93.33
Promoting Interoperability100
Improvement Activities40
Cost54.91

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. MARINA PAVLOVIC NP-C
Nurse Practitioner (Family)
120 MINEOLA BLVD
MINEOLA, NY 11501
Nassau County (516) 663-3000
JOSEPH CIOFFI
Obstetrics & Gynecology
120 MINEOLA BLVD, SUITE 100
MINEOLA, NY 11501
Nassau County (516) 663-3010
DR. JOSEPH PATRICK MAZZIE D.O.
Radiology (Diagnostic Radiology)
120 MINEOLA BLVD, SUITE 10 LOWER LEVEL
MINEOLA, NY 11501
Nassau County (516) 663-4510
PENNY EISENBERG LMSW
Social Worker
120 MINEOLA BLVD, SUITE 100
MINEOLA, NY 11501
Nassau County (516) 663-3010
WINTHROP FACULTY MEDICAL AFFILIATES UNIVERSITY FACULTY PRACTICE CORPOR
Thoracic Surgery (Cardiothoracic Vascular Surgery)
120 MINEOLA BLVD, SUITE 300
MINEOLA, NY 11501
Nassau County (516) 663-4400
DR. WENDY BALOPOLE M.D.
Internal Medicine (Medical Oncology)
120 MINEOLA BLVD, SUITE 430
MINEOLA, NY 11501
Nassau County (516) 742-5353
ANCA-OANA KRANZ MD
Radiology (Diagnostic Radiology)
120 MINEOLA BLVD, SUITE 10 LOWER LEVEL
MINEOLA, NY 11501
Nassau County (516) 663-4510
DR. HYE IN PARK M.D.
Obstetrics & Gynecology
120 MINEOLA BLVD
MINEOLA, NY 11501
Nassau County (646) 457-8851

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Allendorf's NPI number?

The NPI number for John Allendorf is 1740364397. It was assigned to this individual provider in the NPPES registry on October 24, 2006.

Where is John Allendorf located?

John Allendorf practices at 120 Mineola Blvd Suite 320, Mineola, NY 11501. The listed phone number is (516) 663-3300.

What is John Allendorf's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.

Is John Allendorf enrolled in Medicare?

Yes. John Allendorf is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is John Allendorf affiliated with any hospitals?

According to CMS data, John Allendorf is affiliated with Nyu Langone Hospitals.

When was this NPI record last updated?

The NPPES record for John Allendorf was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.