MR. GREGORY WANG MD
NPI 1871778068
Internal Medicine - Nephrology in Fairfax, VA

Q: What is Gregory Wang's NPI number?

The NPI number for Gregory Wang is 1871778068. It was assigned to this individual provider in the NPPES registry on January 7, 2008.

Q: What is Gregory Wang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Wang was last updated on August 11, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.

Active since January 07, 2008PECOS EnrolledAccepts Medicare Assignment

13135 LEE JACKSON MEMORIAL HWY, #135, FAIRFAX, VA 22033(703) 961-0488(703) 961-9103 Get Directions Write a Review

NPPES record last updated: August 11, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Mr. Gregory Wang Md NPPES

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

MR. GREGORY WANG MD (NPI 1871778068) is an individual nephrology provider in Fairfax, Virginia, licensed in Virginia (0101242854) and active in the NPI registry since January 2008. He is enrolled in Medicare PECOS, is affiliated with Inova Alexandria Hospital, and is a graduate of University Of Maryland School Of Medicine (2003).

NPPES Registry Identity

NPI1871778068

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameMR. GREGORY WANGCredential: MD

Location Address13135 LEE JACKSON MEMORIAL HWY, #135Fairfax, VA 22033-1907

Mailing Address13135 Lee Jackson Memorial Hwy, #135Fairfax, VA 22033-1907 · (703) 961-0488 · Fax (703) 961-9103

Phone(703) 961-0488

Fax(703) 961-9103

Sole ProprietorNo

Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2003

Enumeration DateJanuary 7, 2008

Last NPPES UpdateAugust 11, 2016

✔ NPI 1871778068 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in VA · 0101242854

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

13135 LEE JACKSON MEMORIAL HWY, Fairfax, VA 22033

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Other Identifiers 3

Medicaid1871778068VA

Medicare PIN019764N55VA

Medicare PIN156619ZD3WDC

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

Mr. Gregory Wang Md 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 ID6204987142

PECOS Enrollment IDI20090706000452, I20090722000336

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 Gregory Wang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Nephrology Associates Of Northern Virginia, Inc

Same address

Nephrology

13135 LEE JACKSON MEMORIAL HWY, #135
Fairfax, VA 22033

Reassigned Medicare billing, District of Columbia and Virginia enrollments
19 clinicians in this Medicare group

NPI 1174541049 (703) 961-0488

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 12

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.

1,014 services377 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.

443 services264 patients

Dialysis services, 4 or more physician visits per month (20 years or older) 90960

Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.

202 services31 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.

143 services142 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.

69 services63 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.

68 services54 patients

Dialysis services, 2-3 physician visits per month (20 years or older) 90961

Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.

43 services27 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.

40 services40 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

38 services38 patients

Hemodialysis procedure with physician evaluation 90935

Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.

26 services19 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.

22 services20 patients

Online digital evaluation and management service for an established patient for up to 7 days, total time 21 or more minutes 99423

This service involves a week-long digital assessment and management program for existing patients. It includes continuous health monitoring, virtual consultations, and personalized treatment plans. The total time spent is 21 minutes or more, ensuring comprehensive care.

12 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Inova Alexandria Hospital

Acute Care Hospitals · Alexandria, VA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490040

Location4320 Seminary RdAlexandria, VA 22304 · Alexandria City County

Emergency services Birthing friendly

Inova Loudoun Hospital

Acute Care Hospitals · Leesburg, VA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490043

Location44045 Riverside ParkwayLeesburg, VA 20176 · Loudoun County

Emergency services Birthing friendly

Inova Fairfax Hospital

Acute Care Hospitals · Falls Church, VA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490063

Location3300 Gallows RoadFalls Church, VA 22042 · Fairfax County

Emergency services Birthing friendly

Reston Hospital Center

Acute Care Hospitals · Reston, VA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490107

Location1850 Town Center ParkwayReston, VA 20190 · Fairfax County

Emergency services

Uva Health Haymarket Medical Center

Acute Care Hospitals · Haymarket, VA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490144

Location15225 Healthcote BoulevardHaymarket, VA 20169 · Prince William County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22033 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

$147.85 typical visit price

range $65.18 – $194.86

Typical copayment $36.96 (range $16.29 – $48.71)

Most-billed visit code 99204

Established Patient

$113.72 typical visit price

range $21.40 – $158.88

Typical copayment $28.43 (range $5.35 – $39.72)

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.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507

Treatment-Treatment - Miscellaneous · category RX029N

8 suppliers37 claims4,290 services$0.30 avg. paid by Medicare

Mycophenolate mofetil, oral, 250 mg J7517

Treatment-Treatment - Miscellaneous · category RX029N

9 suppliers39 claims6,390 services$0.18 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511

Treatment-Chemotherapy · category RH012N

9 suppliers30 claims30 services$18.31 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512

Treatment-Chemotherapy · category RH012N

9 suppliers45 claims47 services$12.08 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

TRUSTED DOCTORS LLC

Pediatrics

13135 LEE JACKSON MEMORIAL HWY, SUITE 201
FAIRFAX, VA 22033

Fairfax County (703) 391-0900

ELIZABETH SUZANNE RELLIS CPNP

Nurse Practitioner (Pediatrics)

13135 LEE JACKSON MEMORIAL HWY
FAIRFAX, VA 22033

Fairfax County (703) 391-0900

PATRICIA A MCDADE CPNP

Nurse Practitioner (Pediatrics)

13135 LEE JACKSON MEMORIAL HWY, SUITE 201
FAIRFAX, VA 22033

Fairfax County (703) 391-0900

NEPHROLOGY ASSOCIATES OF NORTHERN VIRGINIA, INC

Internal Medicine (Nephrology)

13135 LEE JACKSON MEMORIAL HWY, #135
FAIRFAX, VA 22033

Fairfax County (703) 961-0488

WELLNESS AND PREVENTATIVE CARE CENTERS LLC

Internal Medicine

13135 LEE JACKSON MEMORIAL HWY
FAIRFAX, VA 22033

Fairfax County (703) 648-0015

JOANNA L CASEY FNP-BC

Nurse Practitioner (Family)

13135 LEE JACKSON MEMORIAL HWY, SUITE 201
FAIRFAX, VA 22033

Fairfax County (703) 391-0900

DR. ALI REZA ASSEFI MD

Internal Medicine (Nephrology)

13135 LEE JACKSON MEMORIAL HWY, 135
FAIRFAX, VA 22033

Fairfax County (703) 961-0488

JOCELYN MARIE SMITH FNP

Nurse Practitioner (Family)

13135 LEE JACKSON MEMORIAL HWY
FAIRFAX, VA 22033

Fairfax County (703) 961-0488

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 Gregory Wang's NPI number?

The NPI number for Gregory Wang is 1871778068. It was assigned to this individual provider in the NPPES registry on January 7, 2008.

Where is Gregory Wang located?

Gregory Wang practices at 13135 Lee Jackson Memorial Hwy #135, Fairfax, VA 22033. The listed phone number is (703) 961-0488.

What is Gregory Wang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Gregory Wang enrolled in Medicare?

Yes. Gregory Wang 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 organization bills Medicare for Gregory Wang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Wang reassigns Medicare benefits to Nephrology Associates Of Northern Virginia, Inc (Fairfax, VA). 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 Gregory Wang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Gregory Wang affiliated with any hospitals?

According to CMS data, Gregory Wang is affiliated with Inova Alexandria Hospital, Inova Loudoun Hospital, Inova Fairfax Hospital, Reston Hospital Center and Uva Health Haymarket Medical Center.

When was this NPI record last updated?

The NPPES record for Gregory Wang was last updated on August 11, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.