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MAZEN ZAAROUR M.D.
NPI 1437599875
Internal Medicine - Hematology & Oncology in Winter Garden, FL

Active since June 30, 2013PECOS EnrolledAccepts Medicare Assignment
97.58/100
CMS Quality Rating
2000 FOWLER GROVE BLVD # 3, WINTER GARDEN, FL 34787(407) 609-7510 Get Directions Write a Review

NPPES record last updated: November 17, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 17, 2025, Nov 11, 2019, Aug 6, 2019 (3 updates tracked since 2019).

About Mazen Zaarour M.d. NPPES

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

MAZEN ZAAROUR M.D. (NPI 1437599875) is an individual hematology & oncology provider in Winter Garden, Florida, licensed in Florida (ME173279) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Adventhealth Orlando, and is a graduate of Other (2010).

NPPES Registry Identity

NPI1437599875
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameMAZEN ZAAROURCredential: M.D.
Location Address2000 FOWLER GROVE BLVD # 3Winter Garden, FL 34787-5050
Mailing Address2000 Fowler Grove Blvd # 3Winter Garden, FL 34787-5050 · (407) 609-7510
Phone(407) 609-7510
Sole ProprietorYes
Medical School CMSOtherGraduated 2010
Enumeration DateJune 30, 2013
Last NPPES UpdateNovember 17, 20253 updates tracked since enumeration
NPPES CertifiedNovember 17, 2025
✔ NPI 1437599875 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in FL · ME173279✔ Licensed in AL · 37907
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.
2000 FOWLER GROVE BLVD # 3, Winter Garden, FL 34787
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Superior HealthPlan, Ambetter Health, Florida Blue (BlueCross BlueShield FL) and more.Insurance ›

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

Mazen Zaarour 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 ID2860722030
PECOS Enrollment IDI20191001002932, I20251125003809
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

2

Medicare enrollment records show Mazen Zaarour reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Florida Hospital Medical Group Inc
14 mi
Family Medicine
1115 E RIDGEWOOD ST
Orlando, FL 32803
  • Reassigned Medicare billing, Florida enrollment
  • 3,005 clinicians in this Medicare group
NPI 1225034234 (407) 841-1100
Houston County Healthcare Authority
293 mi
Gynecology
1118 ROSS CLARK CIR, SUITE 210
Dothan, AL 36301
  • Reassigned Medicare billing, Alabama enrollment
  • 514 clinicians in this Medicare group
NPI 1235469669 (334) 702-6900

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 7

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 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.
189 services51 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.
184 services84 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 services38 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
39 services15 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.
28 services25 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.
27 services27 patients

Hospital Affiliations CMS Care Compare

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

Adventhealth Orlando

Acute Care Hospitals · Orlando, FL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100007
Location601 E Rollins StOrlando, FL 32803 · Orange County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 34787 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
$171.84 typical visit price
range $56.00 – $171.84
Typical copayment $42.96 (range $14.00 – $42.96)
Most-billed visit code 99205
Established Patient
$99.16 typical visit price
range $17.57 – $139.16
Typical copayment $24.79 (range $4.39 – $34.79)
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.

97.58/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality86.53
Promoting Interoperability100
Improvement Activities40

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 Mazen Zaarour's NPI number?

The NPI number for Mazen Zaarour is 1437599875. It was assigned to this individual provider in the NPPES registry on June 30, 2013.

Where is Mazen Zaarour located?

Mazen Zaarour practices at 2000 Fowler Grove Blvd # 3, Winter Garden, FL 34787. The listed phone number is (407) 609-7510.

What is Mazen Zaarour's specialty?

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

Is Mazen Zaarour enrolled in Medicare?

Yes. Mazen Zaarour 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 Mazen Zaarour's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mazen Zaarour reassigns Medicare benefits to 2 organizations: Florida Hospital Medical Group Inc (Orlando, FL) and Houston County Healthcare Authority (Dothan, AL). 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 Mazen Zaarour's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mazen Zaarour accept?

Health plans from Ambetter Health, Ambetter from Superior HealthPlan, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and Health First Commercial Plans, Inc. and 3 other insurers list Mazen Zaarour as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mazen Zaarour affiliated with any hospitals?

According to CMS data, Mazen Zaarour is affiliated with Adventhealth Orlando.

When was this NPI record last updated?

The NPPES record for Mazen Zaarour was last updated on November 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.