Mazen Zaarour, M.D.
Hematology & Oncology Physician · Winter Garden, FL
Mazen Zaarour, M.D. is a hematology & oncology physician with a practice address in Winter Garden, Florida, and NPI 1437599875, issued on Jun 30, 2013. Check the license (Florida ME173279, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Mazen Zaarour
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- ME173279 FL
37907 AL
Self-reported in NPPES; status is on the state search - Practice location
- 2000 Fowler Grove Blvd # 3, Winter Garden, FL 34787
- Phone
- (407) 609-7510
- Enumerated
- Jun 30, 2013
- Record last updated
- Nov 17, 2025
- Medicare enrollment
- Enrolled (PECOS I20191001002932); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 818 in Florida → Look up another NPI →
Verify Mazen Zaarour in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME173279Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average hematology & oncology physician in 2024
929 Medicare Part D claims for 158 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 89 claims were for opioids.
Most prescribed
- Letrozole147 claims
- Ondansetron Hcl63 claims
- Prednisone52 claims
- Abiraterone Acetate48 claims
- Oxycodone Hcl33 claims
- Hydrocodone-Acetaminophen30 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 MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,072.95
106 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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.
Bills Medicare through 2 group practices
- Florida Hospital Medical Group IncWinter Garden, FL
- Houston County Healthcare AuthorityDothan, AL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mazen Zaarour among 818 hematology & oncology physician records in Florida
Mazen Zaarour, M.D. is one of 818 hematology & oncology physician records with a practice address in Florida. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 73% of them.
- NPI issued2013 · 73% of these records are older, 22% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2010 · median 2003 among the 581 with a school on file
- Record last updated2025 · 52% 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 Florida 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 Florida
There are 818 hematology & oncology physician records in Florida.
All 818 in Florida → Every provider in Winter Garden → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Christopher Soprenuk, MDLeesburg, FL 347881962499111
- Franco Garcia, DOSaint Cloud, FL 347691689161648
- Alka Arora, M.DOcoee, FL 347611265621817
- Regan Rostorfer, MDOcoee, FL 347611790936409
- Adnan Akhtar, MDKissimmee, FL 347411366404642
- Qamar Khan, MDKissimmee, FL 347411336149012
- Arnold Miller, DOKissimmee, FL 347411164491288
- Jorge Otoya, MDKissimmee, FL 347411558339796
Common questions
What is Mazen Zaarour, M.D.'s NPI number?
Mazen Zaarour, M.D.'s National Provider Identifier (NPI) is 1437599875, issued on Jun 30, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Mazen Zaarour, M.D. located?
The NPPES record lists a practice address at 2000 Fowler Grove Blvd # 3, Winter Garden, FL, 34787. Phone: (407) 609-7510. Providers update this record themselves, so call before visiting.
How can I verify Mazen Zaarour, M.D.'s license?
NPPES lists Florida license number ME173279, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mazen Zaarour, M.D. prescribe under Medicare Part D?
In 2024, Mazen Zaarour, M.D. had 929 Medicare Part D claims for 158 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Mazen Zaarour, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.6 of 100. 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.