DR. BENJAMIN ERNST ONDERDONK M.D.
NPI 1013370295
Radiology - Radiation Oncology in Rochester, NY

Q: What is Benjamin Onderdonk's NPI number?

The NPI number for Benjamin Onderdonk is 1013370295. It was assigned to this individual provider in the NPPES registry on April 4, 2016.

Q: What is Benjamin Onderdonk's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Active since April 04, 2016PECOS EnrolledAccepts Medicare Assignment

95.19/100

CMS Quality Rating

1425 PORTLAND AVE, ROCHESTER, NY 14621(585) 922-4031(585) 922-2971 Get Directions Write a Review

NPPES record last updated: July 2, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 2, 2021, Aug 29, 2017 (2 updates tracked since 2017).

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About Dr. Benjamin Ernst Onderdonk M.d. NPPES

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

DR. BENJAMIN ERNST ONDERDONK M.D. (NPI 1013370295) is an individual radiation oncology provider in Rochester, New York, licensed in New York (309314) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, is affiliated with Geneva General Hospital, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1013370295

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameDR. BENJAMIN ERNST ONDERDONKCredential: M.D.

Location Address1425 PORTLAND AVERochester, NY 14621-3011

Mailing Address100 Kings Hwy SRochester, NY 14617-5504 · (585) 922-4031 · Fax (585) 922-2971

Phone(585) 922-4031

Fax(585) 922-2971

Sole ProprietorNo

Medical School CMSState University Of Ny Upstate Medical UniversityGraduated 2016

Enumeration DateApril 4, 2016

Last NPPES UpdateJuly 2, 20212 updates tracked since enumeration

NPPES CertifiedJuly 2, 2021

✔ NPI 1013370295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

Licenses✔ Licensed in NY · 309314✔ Licensed in IL · 125.069772

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

1425 PORTLAND AVE, Rochester, NY 14621

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Secondary Practice Locations 4

Location 12 Coulter Rd Ste 2615Clifton Springs, NY 14432-1122 · Phone (315) 462-5711 · Fax (315) 462-5361

Location 220 Hagen Dr Ste 100Rochester, NY 14625-2665 · Phone (585) 922-4031 · Fax (585) 922-2971

Location 3127 North StBatavia, NY 14020-1631 · Phone (585) 344-5225 · Fax (585) 344-7475

Location 41561 Long Pond RdRochester, NY 14626-4117 · Phone (585) 922-4031 · Fax (585) 922-2971

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Benjamin Ernst Onderdonk 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 ID6507137585

PECOS Enrollment IDI20210709002810

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.

Medicare Billing Reassignments

Medicare enrollment records show Benjamin Onderdonk reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Rochester General Hospital

0.1 mi

General Acute Care Hospital

1425 PORTLAND AVE
Rochester, NY 14621

Reassigned Medicare billing, New York enrollment
2,285 clinicians in this Medicare group

NPI 1063531929 (585) 922-4000

The Unity Hospital Of Rochester

0.9 mi

General Acute Care Hospital

100 KINGS HWY S
Rochester, NY 14617

Reassigned Medicare billing, New York enrollment
1,442 clinicians in this Medicare group

NPI 1457395766 (585) 922-1900

Clifton Springs Sanitarium Co

28 mi

General Acute Care Hospital

2 COULTER RD
Clifton Springs, NY 14432

Reassigned Medicare billing, New York enrollment
872 clinicians in this Medicare group

NPI 1366505463 (315) 462-9561

United Memorial Medical Center

32 mi

Family Medicine

127 NORTH ST
Batavia, NY 14020

Reassigned Medicare billing, New York enrollment
782 clinicians in this Medicare group

NPI 1669747085 (585) 343-6030

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

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.

Ct guidance for insertion of radiation therapy fields 77014

CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.

205 services14 patients

Calculation of radiation therapy dose 77300

Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.

63 services20 patients

Radiation treatment management, 5 treatment sessions 77427

Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.

49 services16 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.

42 services31 patients

Design and construction of complex radiation treatment device 77334

The design and construction of a complex radiation treatment device is a process where a specialized instrument is created. This device targets harmful cells with high-energy rays to destroy or damage them, while minimizing impact on healthy cells. This aids in treating conditions like cancer.

29 services14 patients

Design and construction of complex radiation treatment device 77334

24 services13 patients

Hospital Affiliations CMS Care Compare 3

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

Geneva General Hospital

Acute Care Hospitals · Geneva, NY

2/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number330058

Location196 -198 North StreetGeneva, NY 14456 · Ontario County

Emergency services

Rochester General Hospital

Acute Care Hospitals · Rochester, NY

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330125

Location1425 Portland AvenueRochester, NY 14621 · Monroe County

Emergency services Birthing friendly

Clifton Springs Hospital And Clinic

Acute Care Hospitals · Clifton Springs, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330265

Location2 Coulter RoadClifton Springs, NY 14432 · Ontario County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14621 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

$166.88 typical visit price

range $54.87 – $166.88

Typical copayment $41.72 (range $13.71 – $41.72)

Most-billed visit code 99205

Established Patient

$68.57 typical visit price

range $17.54 – $136.14

Typical copayment $17.14 (range $4.38 – $34.03)

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.

95.19/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

70.62

Promoting Interoperability

100

Improvement Activities

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.

DR. NIAZ AHMED D.D.S.

Dentist

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (585) 922-4000

DR. BRIAN JOHN THOMAS D.O.

Anesthesiology

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (585) 922-4159

LISA NICOLE FRONCZAK PA-C

Physician Assistant

1425 PORTLAND AVE, BOX 362
ROCHESTER, NY 14621

Monroe County (585) 922-4000

ANDREW ROTANDO DO

Emergency Medicine

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (585) 922-3469

ALEXANDER VAZZANO MD

Emergency Medicine

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (585) 922-4638

AMY BODROG MD

Internal Medicine (Hematology)

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (585) 922-4020

NUMRA ASLAM BAJWA MD

Hospitalist

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (585) 922-5067

DR. PRAKASH UPRETI MD

Hospitalist

1425 PORTLAND AVE
ROCHESTER, NY 14621

Monroe County (295) 029-8769

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 Benjamin Onderdonk's NPI number?

The NPI number for Benjamin Onderdonk is 1013370295. It was assigned to this individual provider in the NPPES registry on April 4, 2016.

Where is Benjamin Onderdonk located?

Benjamin Onderdonk practices at 1425 Portland Ave, Rochester, NY 14621. The listed phone number is (585) 922-4031.

What is Benjamin Onderdonk's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Benjamin Onderdonk enrolled in Medicare?

Yes. Benjamin Onderdonk 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.

Which organizations bill Medicare for Benjamin Onderdonk's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Benjamin Onderdonk reassigns Medicare benefits to 4 organizations: Rochester General Hospital (Rochester, NY), The Unity Hospital Of Rochester (Rochester, NY), Clifton Springs Sanitarium Co (Clifton Springs, NY) and United Memorial Medical Center (Batavia, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Benjamin Onderdonk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Benjamin Onderdonk affiliated with any hospitals?

According to CMS data, Benjamin Onderdonk is affiliated with Geneva General Hospital, Rochester General Hospital and Clifton Springs Hospital And Clinic.

When was this NPI record last updated?

The NPPES record for Benjamin Onderdonk was last updated on July 2, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.