Jay Greenspan, MD
Jay Greenspan, MD is a Neonatal-Perinatal Medicine Physician in Philadelphia, PA, registered under NPI 1639234594.
Getting there
The practice address on file is THOMAS JEFFERSON UNIVERSITY HOSPITAL 111 S. 11TH STREET, Philadelphia, PA 19107. 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 |
|---|---|---|
| MD032008E | PA | Neonatal-Perinatal Medicine Physician primary |
This provider holds licence MD032008E issued in PA. 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 - Pediatric Medicine
- PAC ID
- 5799772281
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Delaware | I20120319000480 | Practitioner - Pediatric Medicine |
| New Jersey | I20230518003124 | Practitioner - Pediatric Medicine |
Medicare enrolment is recorded as approved under the provider type Practitioner - Pediatric Medicine. There are 2 separate enrolment records across 2 states (DE, NJ). 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 Neonatal-Perinatal Medicine covers
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies. NUCC Health Care Provider Taxonomy, code 2080N0001X
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 | 1639234594 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 22, 2006 |
| Last updated | Dec 5, 2012 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
THOMAS JEFFERSON UNIVERSITY HOSPITAL 111 S. 11TH STREET Philadelphia, PA 19107 (215) 955-6000 Fax (215) 923-9519 |
| Mailing address |
PO BOX 191 PROVIDER ENROLLMENT DEPT Rockland, DE 19732 |
| Other identifiers |
1124586
· Medicaid (PA) 2401509 · Medicaid (NJ) 7301111 · Medicaid (MD) |
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 | 6 | 3 | 9 | 2 | 3 | 4 | 5 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 6 | 9 | 4 | 3 | 8 | 5 | 9 |
Sum = 76 · next multiple of 10 = 80 · check digit = 4 · actual last digit = 4
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.