1. Home
  2. Directory
  3. New York
  4. Bronx
  5. Internal Medicine
  6. NPI Profile

DR. MARK CHAITOWITZ MD
NPI 1922215680
Internal Medicine - Hematology & Oncology in Bronx, NY

Active since May 16, 2007PECOS Enrolled
100/100
CMS Quality Rating
3411 WAYNE AVE, 1ST FLOOR, BRONX, NY 10467(718) 920-4137 Get Directions Write a Review

NPPES record last updated: April 14, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Mark Chaitowitz Md NPPES

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

DR. MARK CHAITOWITZ MD (NPI 1922215680) is an individual hematology & oncology provider in Bronx, New York, licensed in New York (253878-1) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Montefiore Medical Center, and is a graduate of Other (1997).

NPPES Registry Identity

NPI1922215680
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. MARK CHAITOWITZCredential: MD
Location Address3411 WAYNE AVE, 1ST FLOORBronx, NY 10467-2509
Mailing Address3411 Wayne Ave, 1st FloorBronx, NY 10467-2509 · (718) 920-4137
Phone(718) 920-4137
Sole ProprietorYes
Medical School CMSOtherGraduated 1997
Enumeration DateMay 16, 2007
Last NPPES UpdateApril 14, 2017
✔ NPI 1922215680 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in NY · 253878-1
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
3411 WAYNE AVE, Bronx, NY 10467
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Chaitowitz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7719069533
PECOS Enrollment IDI20131021000680
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 Reassignment

Medicare enrollment records show Mark Chaitowitz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Montefiore Medical Center
0.1 mi
Anesthesiology
111 E 210TH ST
Bronx, NY 10467
  • Reassigned Medicare billing, New York enrollment
  • 5,251 clinicians in this Medicare group
NPI 1063525152 (914) 378-6021

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 8

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.

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.
73 services40 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
52 services50 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.
49 services43 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
39 services22 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.
27 services13 patients
Telephone, internet, or electronic health record assessment and management with written report by consulting physician, at least 5 minutes 99451
This service involves a consulting physician assessing your health condition via a phone or internet interaction. The doctor will spend at least 5 minutes discussing your health concerns. Afterwards, a written report summarizing the findings and recommendations will be provided for your reference.
25 services23 patients

Hospital Affiliations CMS Care Compare

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

Montefiore Medical Center

Acute Care Hospitals · Bronx, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330059
Location111 East 210th StreetBronx, NY 10467 · Bronx County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10467 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
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
Most-billed visit code 99214
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.

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

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. RONALD C SAMUELS MD, MPH
Pediatrics
3411 WAYNE AVE
BRONX, NY 10467
Bronx County (718) 741-2507
SWATI GOEL MD
Internal Medicine (Hematology & Oncology)
3411 WAYNE AVE, HEMATOLOGY SUITE, GROUND FLOOR
BRONX, NY 10467
Bronx County (718) 920-6310
CHIOMA NDUKWE MD
Internal Medicine (Infectious Disease)
3411 WAYNE AVE
BRONX, NY 10467
Bronx County (941) 290-0720
BIBI AYESHA M.D
Internal Medicine
3411 WAYNE AVE
BRONX, NY 10467
Bronx County (718) 405-8360
DR. MINA DAOUD AZIZ MD
Dermatology
3411 WAYNE AVE
BRONX, NY 10467
Bronx County (718) 920-2680
KRYSTINA THERESE MATHELIER ANP-BC
Nurse Practitioner (Adult Health)
3411 WAYNE AVE
BRONX, NY 10467
Bronx County (718) 920-6310
AMY FRANCES DOWD N.P., R.D.
Nurse Practitioner (Pediatrics)
3411 WAYNE AVE, 4TH FLOOR
BRONX, NY 10467
Bronx County (718) 920-4664
SOPHIA LEE
Nurse Practitioner (Family)
3411 WAYNE AVE
BRONX, NY 10467
Bronx County (718) 920-6310

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 Mark Chaitowitz's NPI number?

The NPI number for Mark Chaitowitz is 1922215680. It was assigned to this individual provider in the NPPES registry on May 16, 2007.

Where is Mark Chaitowitz located?

Mark Chaitowitz practices at 3411 Wayne Ave 1st Floor, Bronx, NY 10467. The listed phone number is (718) 920-4137.

What is Mark Chaitowitz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Mark Chaitowitz enrolled in Medicare?

Yes. Mark Chaitowitz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Chaitowitz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Chaitowitz reassigns Medicare benefits to Montefiore Medical Center (Bronx, NY). The 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 Mark Chaitowitz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mark Chaitowitz affiliated with any hospitals?

According to CMS data, Mark Chaitowitz is affiliated with Montefiore Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Chaitowitz was last updated on April 14, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.