Sameer Ahmed, MD
Sameer Ahmed, MD is a Vascular & Interventional Radiology Physician in New Haven, CT, registered under NPI 1104191444. 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 20 YORK ST, New Haven, CT 06510. 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 |
|---|---|---|
| 036.142379 | IL | Vascular & Interventional Radiology… primary |
| 036.142379 | IL | Diagnostic Radiology Physician |
This provider holds licence 036.142379 issued in IL. 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 Radiology
- PAC ID
- 7810138245
Enrolled in Medicare 3 times, across 3 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Illinois | I20180619003294 | Practitioner - Interventional Radiology |
| Michigan | I20240813002256 | Practitioner - Vascular Surgery |
| Texas | I20260223001975 | Practitioner - Interventional Radiology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Interventional Radiology. There are 3 separate enrolment records across 3 states (IL, MI, TX). 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 Vascular & Interventional Radiology covers
A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging. NUCC Health Care Provider Taxonomy, code 2085R0204X
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 | |
|---|---|---|---|---|
| 2085R0204X | Vascular & Interventional Radiology Physician Vascular & Interventional Radiology | 036.142379 | IL | primary |
| 2085R0202X | Diagnostic Radiology Physician Diagnostic Radiology | 036.142379 | IL | |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1104191444 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 20, 2012 |
| Last updated | Apr 17, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
20 YORK ST New Haven, CT 06510 (203) 688-5555 Fax (203) 688-4516 |
| Mailing address |
333 CEDAR ST PO BOX 208030 New Haven, CT 06510 |
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 | 1 | 0 | 4 | 1 | 9 | 1 | 4 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 0 | 4 | 2 | 9 | 2 | 4 | 8 |
Sum = 56 · next multiple of 10 = 60 · 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.