Stephen Day, M.D.
Stephen Day, M.D. is an Interventional Cardiology Physician in Alexandria, VA, registered under NPI 1851397467. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 4825 MARK CENTER DR STE 150, Alexandria, VA 22311. 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 |
|---|---|---|
| 0101057025 | VA | Interventional Cardiology Physician primary |
| 0101057025 | VA | Cardiovascular Disease Physician |
This provider holds licence 0101057025 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 - Interventional Cardiology
- PAC ID
- 3577557180
Medicare enrolment is recorded as approved under the provider type Practitioner - Interventional Cardiology. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Interventional Cardiology covers
An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system. NUCC Health Care Provider Taxonomy, code 207RI0011X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RI0011X | Interventional Cardiology Physician Interventional Cardiology | 0101057025 | VA | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 0101057025 | 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 | 1851397467 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 28, 2005 |
| Last updated | Aug 25, 2022 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
4825 MARK CENTER DR STE 150 Alexandria, VA 22311 (703) 751-8111 Fax (703) 751-1105 |
| Mailing address |
2901 TELESTAR CT. #300 Falls Church, VA 22042 |
| Other identifiers |
1851397467
(VA) 029735400 (DC) 101700400 (MD) 060059673 · RAILROAD MEDICARE DC# (DC) 060059673 · RAILROAD MEDICARE VA# (VA) |
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 | 8 | 5 | 1 | 3 | 9 | 7 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 1 | 1 | 6 | 9 | 5 | 4 | 3 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
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.