John Najjar, MD
John Najjar, MD is a Vascular Surgery Physician in Worcester, MA, registered under NPI 1487630935. 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 123 SUMMER ST SUITE 210, Worcester, MA 01608. 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 |
|---|---|---|
| 210201 | MA | Vascular Surgery Physician primary |
| 210201 | MA | Surgery Physician |
This provider holds licence 210201 issued in MA. 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 - Vascular Surgery
- PAC ID
- 3779628896
- Enrollment ID
- I20100301000611
Medicare enrolment is recorded as approved under the provider type Practitioner - Vascular Surgery. 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 Vascular Surgery covers
A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart. NUCC Health Care Provider Taxonomy, code 2086S0129X
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 | |
|---|---|---|---|---|
| 2086S0129X | Vascular Surgery Physician Vascular Surgery | 210201 | MA | primary |
| 208600000X | Surgery Physician | 210201 | MA |
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 | 1487630935 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 16, 2005 |
| Last updated | Feb 20, 2009 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
123 SUMMER ST SUITE 210 Worcester, MA 01608 (508) 368-3190 Fax (508) 368-3193 |
| Mailing address |
630 PLANTATION ST Worcester, MA 01605 |
| Other identifiers |
042472266
· Other 0142701 · Other J23719 · Other 0142701 · Other 042472266 · Other 7258566 · Other 784058 · Other AA4381 · Other 042472266 · Other J23719 · Other 042472266 · Other 6272907 · Other J23719 · Other 042472266 · Other 1927085 · Other 3700073 · Other 61247 · 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 | 4 | 8 | 7 | 6 | 3 | 0 | 9 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 7 | 7 | 3 | 3 | 0 | 9 | 6 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
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.