Nassar Khan, M.D.
Nassar Khan, M.D. is a Hematology (Internal Medicine) Physician in Fairfax, VA, registered under NPI 1396708608. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 3580 JOSEPH SIEWICK DR STE 403, Fairfax, VA 22033. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 0101053383 | VA | Hematology (Internal Medicine) Physician primary |
| 0101053383 | VA | Hematology & Oncology Physician |
| 0101053383 | VA | Medical Oncology Physician |
This provider holds licence 0101053383 issued in VA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Hematology
- PAC ID
- 3577588128
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| District of Columbia | I20051012000735 | Practitioner - Hematology |
| Virginia | I20160607000317 | Practitioner - Hematology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Hematology. There are 2 separate enrolment records across 2 states (DC, VA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Hematology covers
An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma. NUCC Health Care Provider Taxonomy, code 207RH0000X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RH0000X | Hematology (Internal Medicine) Physician Hematology | 0101053383 | VA | primary |
| 207RH0003X | Hematology & Oncology Physician Hematology & Oncology | 0101053383 | VA | |
| 207RX0202X | Medical Oncology Physician Medical Oncology | 0101053383 | VA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1396708608 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 8, 2006 |
| Last updated | Dec 14, 2021 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
3580 JOSEPH SIEWICK DR STE 403 Fairfax, VA 22033 (703) 391-4395 Fax (703) 391-4394 |
| Mailing address |
PO BOX 37174 Baltimore, MD 21297 |
| Other identifiers |
2972-0001
· Other (DC) 005848784 · Medicaid (VA) 542000362 · Other 542000362 · Other |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 3 | 9 | 6 | 7 | 0 | 8 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 9 | 6 | 5 | 0 | 7 | 6 | 0 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.