Nassar Farid Khan, M.D.
Hematology · Medical Oncology (CMS) · Fairfax, VA
At a glance
3580 Joseph Siewick Dr Ste 403, Fairfax, VA 22033-1764
NPPES record updated Dec 14, 2021. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
3580 Joseph Siewick Dr Ste 403Fairfax, VA 22033-1764
Additional reported practice locations
2826 Old Lee HwySuite 110
Fairfax, VA 220314323
Phone: 7035608444 4320 Seminary Rd
Alexandria, VA 223041535
Phone: 7035043000
Fax: 7035043388 1800 N Beauregard St Ste 350
Alexandria, VA 223111725
Phone: 7039338125
Fax: 7039338216 1800 N Beauregard St Ste 210
Alexandria, VA 223111735
Phone: 7039338125
Fax: 7039338216 8501 Arlington Blvd Ste 340
Fairfax, VA 220314625
Phone: 7032070733
Fax: 7032070736 44055 Riverside Pkwy Ste 108
Leesburg, VA 201765179
Phone: 7038588600
Fax: 7038588603 3300 Gallows Rd
Falls Church, VA 220423307
Phone: 7037764001
Fax: 7037767113 8081 Innovation Park Dr
Fairfax, VA 220314867
Phone: 5714724724
Fax: 5714720241 3600 Joseph Siewick Dr
Fairfax, VA 220331709
Phone: 7033913600
Fax: 7033913414
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1985
- CMS specialties
- Hematology · Medical Oncology
Practice groups
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Hematology · Medical Oncology (CMS)
- Taxonomy code
- 207RH0000X
- Enumeration date
- Apr 8, 2006
- Record updated
- Dec 14, 2021
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207RH0003X
License reported: 0101053383 VA
207RX0202X
License reported: 0101053383 VA
207RH0000X · Primary
License reported: 0101053383 VA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
3580 Joseph Siewick Dr Ste 403Fairfax, VA 22033-1764
- Phone
- (703) 391-4395
- Fax
- (703) 391-4394
Mailing address
PO BOX 37174BALTIMORE, MD 212973174
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
Report a directory issue