BORYS R MYCHALCZAK MD
NPI 1932189180
Radiology - Radiation Oncology in Sleepy Hollow, NY

Q: What is Borys Mychalczak's NPI number?

The NPI number for Borys Mychalczak is 1932189180. It was assigned to this individual provider in the NPPES registry on January 21, 2006.

Q: What is Borys Mychalczak's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Borys Mychalczak was last updated on April 7, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.

Active since January 21, 2006PECOS EnrolledAccepts Medicare Assignment

96.04/100

CMS Quality Rating

777 N BROADWAY, SLEEPY HOLLOW, NY 10591(212) 639-2000 Get Directions Write a Review

NPPES record last updated: April 7, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Borys R Mychalczak Md NPPES

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

BORYS R MYCHALCZAK MD (NPI 1932189180) is an individual radiation oncology provider in Sleepy Hollow, New York, licensed in New York (167634) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (1985).

NPPES Registry Identity

NPI1932189180

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameBORYS R MYCHALCZAKCredential: MD

Location Address777 N BROADWAYSleepy Hollow, NY 10591-1000

Mailing Address633 3rd Ave, Box 3New York, NY 10017-6706

Phone(212) 639-2000

Sole ProprietorNo

Medical School CMSWayne State University School Of MedicineGraduated 1985

Enumeration DateJanuary 21, 2006

Last NPPES UpdateApril 7, 2015

✔ NPI 1932189180 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in NY · 167634

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.

777 N BROADWAY, Sleepy Hollow, NY 10591

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Other Identifiers 1

Medicare UPIND92061

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

Borys R Mychalczak Md 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 ID8820286701

PECOS Enrollment IDI20101220000076, I20110322000958

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 Borys Mychalczak reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Msk Harrison

8.7 mi

Medical Oncology

500 WESTCHESTER AVE
West Harrison, NY 10604

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

NPI 1174923593 (212) 639-2000

Msk Bergen

12 mi

Medical Oncology

225 SUMMIT AVE
Montvale, NJ 07645

Reassigned Medicare billing, New Jersey enrollment
401 clinicians in this Medicare group

NPI 1558814657 (908) 542-3336

Memorial Radiation Oncology Group

24 mi

Radiation Oncology

1275 YORK AVE
New York, NY 10021

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

NPI 1235109224 (646) 227-3813

Memorial Sloan Kettering Cancer Center At Basking Ridge New Jersey

50 mi

Medical Oncology

136 MOUNTAIN VIEW BLVD
Basking Ridge, NJ 07920

Reassigned Medicare billing, New Jersey enrollment
385 clinicians in this Medicare group

NPI 1184637886 (908) 542-3000

Msk Monmouth

53 mi

Medical Oncology

480 RED HILL RD
Middletown, NJ 07748

Reassigned Medicare billing, New Jersey enrollment
464 clinicians in this Medicare group

NPI 1922459163 (908) 542-3007

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 27

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.

Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy G6002

Stereoscopic x-ray guidance is a technique used in radiation therapy. It involves taking multiple X-ray images from different angles to create a 3D picture of the area to be treated. This helps accurately pinpoint the exact location for radiation delivery, ensuring the therapy is as effective as possible.

1,330 services186 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.

352 services101 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.

250 services75 patients

Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy G6002

152 services42 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

113 services113 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

110 services97 patients

Complex radiation therapy planning 77263

Complex radiation therapy planning is a process to determine the most effective way to deliver radiation to a specific area in your body. It involves detailed imaging to map your body's structure, allowing for precise targeting of cancer cells while sparing healthy tissue.

101 services100 patients

Design and construction of radiation treatment device for high precision radiation therapy 77338

A radiation treatment device is custom-made for each patient to target cancer cells with high precision. It's designed to focus radiation on the tumor, sparing healthy tissue. This process ensures effective therapy while minimizing side effects.

101 services98 patients

High precision radiation therapy planning 77301

High precision radiation therapy planning involves detailed mapping of your body to target cancer cells accurately. Advanced imaging techniques help identify the exact location of the tumor, minimizing harm to healthy tissues. This personalized approach enhances effectiveness and reduces side effects.

100 services98 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.

93 services81 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

56 services53 patients

Calculation of radiation therapy dose 77300

45 services11 patients

Management of cranial lesion surgery using radiation over multiple sessions 77435

This procedure involves using targeted radiation to treat a lesion in the brain over several sessions. The radiation destroys the abnormal cells, helping to control or eliminate the lesion. It's a non-invasive treatment, meaning no surgical cuts are made.

42 services40 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.

38 services33 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

38 services33 patients

Radiation treatment management, 5 treatment sessions 77427

37 services11 patients

Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved 77290

This procedure involves collecting necessary data to plan the best radiation treatment. It may cover 3 or more areas or any area requiring special attention. Data collection includes imaging scans and tests to understand the disease's extent and to tailor a precise, effective treatment plan.

36 services23 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

30 services30 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

28 services24 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

Design and construction of complex radiation treatment device 77334

17 services15 patients

Design and construction of simple radiation treatment device 77332

A simple radiation treatment device is designed and built to target specific areas in your body with high energy rays. This process is carefully planned to ensure that the radiation accurately reaches the area needing treatment, while minimizing exposure to healthy tissues.

16 services16 patients

Complex radiation therapy planning 77263

14 services14 patients

Obtaining data needed to develop the optimal radiation treatment, 1 treatment area 77280

This procedure involves gathering essential information to create the best radiation treatment plan for a specific area. It includes scanning the treatment area and using this data to calculate the precise dose of radiation needed to target the disease effectively, while sparing healthy tissue.

14 services13 patients

High precision radiation therapy planning 77301

11 services11 patients

Design and construction of radiation treatment device for high precision radiation therapy 77338

11 services11 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10591 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.

96.04/100

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

Scored as part of a group practice

Quality

92.55

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.

JULIETA STUMPF MS, CCC-SLP

Speech-Language Pathologist

777 N BROADWAY
SLEEPY HOLLOW, NY 10591

Westchester County (914) 366-3010

PHILIP C CARON MD

Internal Medicine (Medical Oncology)

777 N BROADWAY
SLEEPY HOLLOW, NY 10591

Westchester County (212) 639-2000

DR. ANJALI ANKOLEKAR MD

Obstetrics & Gynecology

777 N BROADWAY, SUITE 308
SLEEPY HOLLOW, NY 10591

Westchester County (914) 631-0908

DR. LOUIS ANTHONY BUZZEO MD

Internal Medicine (Nephrology)

777 N BROADWAY, SUITE 203
SLEEPY HOLLOW, NY 10591

Westchester County (914) 332-9100

BORIS A MUELLER MD

Radiology (Radiation Oncology)

777 N BROADWAY
SLEEPY HOLLOW, NY 10591

Westchester County (212) 639-2000

WESTCHESTER INTERNAL MEDICINE PC

Internal Medicine

777 N BROADWAY, SUITE 310
SLEEPY HOLLOW, NY 10591

Westchester County (914) 333-0034

HUDSON VALLEY SURGICAL GROUP, LLP

Surgery

777 N BROADWAY, SUITE 204
SLEEPY HOLLOW, NY 10591

Westchester County (914) 631-3660

PHELPS MEMORIAL HOSPITAL

General Acute Care Hospital

777 N BROADWAY, SUITE 303
SLEEPY HOLLOW, NY 10591

Westchester County (914) 366-3011

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 Borys Mychalczak's NPI number?

The NPI number for Borys Mychalczak is 1932189180. It was assigned to this individual provider in the NPPES registry on January 21, 2006.

Where is Borys Mychalczak located?

Borys Mychalczak practices at 777 N Broadway, Sleepy Hollow, NY 10591. The listed phone number is (212) 639-2000.

What is Borys Mychalczak's specialty?

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

Is Borys Mychalczak enrolled in Medicare?

Yes. Borys Mychalczak 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 Borys Mychalczak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Borys Mychalczak reassigns Medicare benefits to 5 organizations: Msk Harrison (West Harrison, NY), Msk Bergen (Montvale, NJ), Memorial Radiation Oncology Group (New York, NY), Memorial Sloan Kettering Cancer Center At Basking Ridge New Jersey (Basking Ridge, NJ) and Msk Monmouth (Middletown, NJ). 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 Borys Mychalczak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Borys Mychalczak was last updated on April 7, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.