1. Home
  2. Directory
  3. Virginia
  4. Fairfax
  5. Internal Medicine
  6. NPI Profile

FAIRFAX LUNG CENTER PC
NPI 1790951994
Internal Medicine - Pulmonary Disease in Fairfax, VA

Active since May 07, 2008
3650 JOSEPH SIEWICK DR, SUITE 303, FAIRFAX, VA 22033(703) 389-1027 Get Directions Write a Review

NPPES record last updated: February 2, 2009. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Fairfax Lung Center Pc NPPES

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

FAIRFAX LUNG CENTER PC (NPI 1790951994) is a healthcare organization registered as a pulmonary disease in Fairfax, Virginia and active in the NPI registry since May 2008. The organization lists William Osborn Hartzell, President, as its authorized official.

NPPES Registry Identity

NPI1790951994
Entity TypeOrganization
Primary Taxonomy207RP1001X
Legal Business NameFAIRFAX LUNG CENTER PC
Location Address3650 JOSEPH SIEWICK DR, SUITE 303Fairfax, VA 22033-1710
Mailing Address2916 Hibbard StOakton, VA 22124-2648 · (703) 242-0919
Phone(703) 389-1027
Organization SubpartNo
Authorized OfficialWilliam Osborn HartzellPresident · (703) 389-1027
Enumeration DateMay 7, 2008
Last NPPES UpdateFebruary 2, 2009
✔ NPI 1790951994 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in VA · 101239857
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
3650 JOSEPH SIEWICK DR, Fairfax, VA 22033
Open in Google Maps ↗

Other Identifiers 1

Medicare UPING32356VA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Fairfax Lung Center Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by March 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateDistrict of ColumbiaEnrollment IDO20090209000030Non-DME Part B · Clinic/Group PracticeDue dateMarch 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Fairfax Lung Center PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

William Hartzell, M.D.
Pulmonary Disease
NPI 1417938986
150 FLANDERS RD
Westborough, MA 01581
(508) 871-2000
✔ PECOS385 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Fairfax Lung Center PC's NPI number?

The NPI number for Fairfax Lung Center PC is 1790951994. It was assigned to this organization in the NPPES registry on May 7, 2008.

Where is Fairfax Lung Center PC located?

Fairfax Lung Center PC is located at 3650 Joseph Siewick Dr Suite 303, Fairfax, VA 22033. The listed phone number is (703) 389-1027.

What is Fairfax Lung Center PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Fairfax Lung Center PC enrolled in Medicare?

Yes. Fairfax Lung Center PC is registered in the Medicare PECOS enrollment system.

When is Fairfax Lung Center PC's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (District of Columbia, Clinic/Group Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Fairfax Lung Center PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Pulmonary Disease) reassigns their Medicare billing to Fairfax Lung Center PC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Fairfax Lung Center PC was last updated on February 2, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.