James Guarrera, MD
James Guarrera, MD is a Transplant Surgery Physician in Newark, NJ, registered under NPI 1417998782.
Getting there
The practice address on file is 140 BERGEN ST # E1620, Newark, NJ 07103. 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 |
|---|---|---|
| 214324-1 | NY | Transplant Surgery Physician primary |
This provider holds licence 214324-1 issued in NY. 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 - General Surgery
- PAC ID
- 0042240202
Enrolled in Medicare 3 times, across 3 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| New Jersey | I20090521000563 | Practitioner - General Surgery |
| Delaware | I20251129000289 | Practitioner - Pediatric Medicine |
| Pennsylvania | I20260102000320 | Practitioner - General Surgery |
Medicare enrolment is recorded as approved under the provider type Practitioner - General Surgery. There are 3 separate enrolment records across 3 states (NJ, DE, PA). 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 Transplant Surgery covers
A surgeon who specializes in transplant surgery. NUCC Health Care Provider Taxonomy, code 204F00000X
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 | 1417998782 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 9, 2006 |
| Last updated | Apr 4, 2019 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
140 BERGEN ST # E1620 Newark, NJ 07103 (973) 972-7218 Fax (973) 972-6227 |
| Mailing address |
30 BERGEN ST RM 1205 Newark, NJ 07107 |
| Other identifiers |
02660960
· Medicaid (NY) |
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 | 1 | 7 | 9 | 9 | 8 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 2 | 7 | 9 | 9 | 7 | 7 | 7 |
Sum = 78 · next multiple of 10 = 80 · check digit = 2 · actual last digit = 2
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.