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NADIA KOUSAR M.D.
NPI 1306002233
Internal Medicine - Infectious Disease in Leesburg, VA

Active since July 30, 2008PECOS EnrolledAccepts Medicare Assignment
44045 RIVERSIDE PKWY, LEESBURG, VA 20176(703) 858-6000(703) 858-6900 Get Directions Write a Review

NPPES record last updated: March 6, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 6, 2021, Dec 11, 2017 (2 updates tracked since 2017).

About Nadia Kousar M.d. NPPES

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

NADIA KOUSAR M.D. (NPI 1306002233) is an individual infectious disease provider in Leesburg, Virginia, licensed in Virginia (0101271022) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, maintains a secondary practice location in Rochester, and is a graduate of Other (2004).

NPPES Registry Identity

NPI1306002233
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameNADIA KOUSARCredential: M.D.
Location Address44045 RIVERSIDE PKWYLeesburg, VA 20176-5101
Mailing AddressPo Box 37174Baltimore, MD 21297-3174 · (571) 423-5699 · Fax (571) 423-5698
Phone(703) 858-6000
Fax(703) 858-6900
Sole ProprietorNo
Medical School CMSOtherGraduated 2004
Enumeration DateJuly 30, 2008
Last NPPES UpdateMarch 6, 20212 updates tracked since enumeration
NPPES CertifiedMarch 6, 2021
✔ NPI 1306002233 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
Licenses✔ Licensed in VA · 0101271022✔ Licensed in NY · 277861
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
44045 RIVERSIDE PKWY, Leesburg, VA 20176
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Secondary Practice Location 1

Location 11425 Portland Ave # 246Rochester, NY 14621-3001 · Phone (585) 922-4003 · Fax (585) 922-5168

Other Identifiers 1

Medicaid04290837NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource.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

Nadia Kousar 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 ID1850518515
PECOS Enrollment IDI20231102001182
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

7

Medicare enrollment records show Nadia Kousar reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inova Health Care Services
16 mi
Urgent Care
100 MAPLE AVE E
Vienna, VA 22180
  • Reassigned Medicare billing, Virginia enrollment
  • 2,379 clinicians in this Medicare group
NPI 1275886418 (703) 938-5300
Clifton Springs Sanitarium Co
269 mi
General Acute Care Hospital
2 COULTER RD
Clifton Springs, NY 14432
  • Reassigned Medicare billing, New York enrollment
  • 872 clinicians in this Medicare group
NPI 1366505463 (315) 462-9561
Newark Wayne Community Hospital
276 mi
General Acute Care Hospital
1200 DRIVING PARK AVE
Newark, NY 14513
  • Reassigned Medicare billing, New York enrollment
  • 679 clinicians in this Medicare group
NPI 1346369212 (315) 332-2022
Rochester General Hospital
277 mi
Family Medicine
181 LOMB MEMORIAL DR
Rochester, NY 14623
  • Reassigned Medicare billing, New York enrollment
  • 2,285 clinicians in this Medicare group
NPI 1174990303 (585) 922-3100
Hartford Healthcare Medical Group Specialists, PLLC
313 mi
Surgery
85 SEYMOUR ST STE 415
Hartford, CT 06106
  • Reassigned Medicare billing, Connecticut enrollment
  • 1,921 clinicians in this Medicare group
NPI 1023584216 (860) 246-2071
Prospect Ct Medical Foundation, Inc.
321 mi
Family Medicine
71 HAYNES ST, MILLER BLDG., FLOOR G
Manchester, CT 06040
  • Reassigned Medicare billing, Connecticut enrollment
  • 422 clinicians in this Medicare group
NPI 1144677568 (860) 533-2981
Medical Health 360 PLLC
346 mi
Pediatrics
16955 COUNTY ROUTE 59
Dexter, NY 13634
  • Reassigned Medicare billing, New York enrollment
  • 11 clinicians in this Medicare group
NPI 1497374359 (888) 860-0507

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 4

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.

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.
28 services18 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.
16 services15 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
13 services12 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20176 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
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$99.13 typical visit price
range $18.07 – $138.91
Typical copayment $24.78 (range $4.51 – $34.72)
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.

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.

MUNIRA DABHIYA MD
Internal Medicine
44045 RIVERSIDE PKWY
LEESBURG, VA 20176
Loudoun County (703) 858-6000
DR. JOSHUA JAMES WIND M.D.
Neurological Surgery
44045 RIVERSIDE PKWY
LEESBURG, VA 20176
Loudoun County (703) 858-6000
TAYLOR HELENE LUNA
Registered Nurse
44045 RIVERSIDE PKWY
LEESBURG, VA 20176
Loudoun County (703) 858-6000
JENNIFER GUT
Nurse Anesthetist, Certified Registered
44045 RIVERSIDE PKWY
LEESBURG, VA 20176
Loudoun County (703) 858-6000
DR. WILLIAM PAUL HARRIS MD
Anesthesiology
44045 RIVERSIDE PKWY
LEESBURG, VA 20176
Loudoun County (703) 858-6000
BENJAMIN HARRISON MCILWAINE MD
Family Medicine
44045 RIVERSIDE PKWY, INOVA LOUDOUN HOSPITAL
LEESBURG, VA 20176
Loudoun County (703) 858-6044
MR. ANDREW SANDERS JR. CRNA
Nurse Anesthetist, Certified Registered
44045 RIVERSIDE PKWY, INOVA LOUDOUN HOSPITAL
LEESBURG, VA 20176
Loudoun County (703) 858-6000
MS. MINTRA SARASUP CRNA
Nurse Anesthetist, Certified Registered
44045 RIVERSIDE PKWY
LEESBURG, VA 20176
Loudoun County (703) 858-6000

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 Nadia Kousar's NPI number?

The NPI number for Nadia Kousar is 1306002233. It was assigned to this individual provider in the NPPES registry on July 30, 2008.

Where is Nadia Kousar located?

Nadia Kousar practices at 44045 Riverside Pkwy, Leesburg, VA 20176. The listed phone number is (703) 858-6000.

What is Nadia Kousar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Nadia Kousar enrolled in Medicare?

Yes. Nadia Kousar 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 Nadia Kousar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nadia Kousar reassigns Medicare benefits to 7 organizations: Inova Health Care Services (Vienna, VA), Clifton Springs Sanitarium Co (Clifton Springs, NY), Newark Wayne Community Hospital (Newark, NY), Rochester General Hospital (Rochester, NY), Hartford Healthcare Medical Group Specialists, PLLC (Hartford, CT) and 2 more organizations, listed in the Medicare section above. 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 Nadia Kousar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nadia Kousar accept?

Health plans from Anthem Blue Cross and Blue Shield and CareSource list Nadia Kousar 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.

When was this NPI record last updated?

The NPPES record for Nadia Kousar was last updated on March 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.