Mark Chaitowitz, MD
Hematology & Oncology Physician · Bronx, NY
Mark Chaitowitz, MD is a hematology & oncology physician with a practice address in Bronx, New York, and NPI 1922215680, issued on May 16, 2007. Check the license (New York 253878-1, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark Chaitowitz
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 253878-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3411 Wayne Ave, Bronx, NY 10467
- Phone
- (718) 920-4137
- Enumerated
- May 16, 2007
- Record last updated
- Apr 14, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20131021000680); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,163 in New York → Look up another NPI →
Also registered at 3411 Wayne Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yelitza Aguilera, RDNRegistered Dietitian1881477727
- Bibi Ayesha, M.DInternal Medicine Physician1063768745
- Mina Aziz, MDDermatology Physician1063972719
- Rachael Bertuzzi, RNFamily Nurse Practitioner1457744393
- Alex Chen, D.M.D.Student in an Organized Health Care Education/Training Program1912285040
- Rachel CohenStudent in an Organized Health Care Education/Training Program1801680202
Verify Mark Chaitowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 253878-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
386 Medicare Part D claims for 71 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Eliquis142 claims
- Hydroxyurea74 claims
- Xarelto39 claims
- Imbruvica24 claims
- Imatinib Mesylate15 claims
- Calquence14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $15.00
1 payment: education; the largest payer was Alexion Pharmaceuticals, Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Montefiore Medical CenterBronx, NY · Acute Care Hospitals3 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark Chaitowitz among 1,163 hematology & oncology physician records in New York
Mark Chaitowitz, MD is one of 1,163 hematology & oncology physician records with a practice address in New York. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 44% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1997 · median 2002 among the 833 with a school on file
- Record last updated2017 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in New York
There are 1,163 hematology & oncology physician records in New York.
All 1,163 in New York → Every provider in Bronx → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jesus Anampa Mesias, M.DBronx, NY 104671356590772
- Mahadi Baig, MDBronx, NY 104671013162361
- Fernando Camacho, MDBronx, NY 104671427095785
- David Fernandes, MDBronx, NY 104671154340826
- Daniel Friedman, MDBronx, NY 104671538180252
- Caroline Hwang, MDBronx, NY 104671811102718
- Charna Klein, MDBronx, NY 104671447331608
- Noah Kornblum, MDBronx, NY 104671053461517
Common questions
What is Mark Chaitowitz, MD's NPI number?
Mark Chaitowitz, MD's National Provider Identifier (NPI) is 1922215680, issued on May 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Chaitowitz, MD located?
The NPPES record lists a practice address at 3411 Wayne Ave, Bronx, NY, 10467. Phone: (718) 920-4137. Providers update this record themselves, so call before visiting.
How can I verify Mark Chaitowitz, MD's license?
NPPES lists New York license number 253878-1, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Chaitowitz, MD prescribe under Medicare Part D?
In 2024, Mark Chaitowitz, MD had 386 Medicare Part D claims for 71 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Mark Chaitowitz, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.