Avi Fischer, M.D.
Avi Fischer, M.D. is a Clinical Cardiac Electrophysiology Physician in New York, NY, registered under NPI 1821081878. This provider registers 2 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 MOUNT SINAI MEDICAL CENTER 5 EAST 98TH STREET, 3RD FLOOR, New York, NY 10029. 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 |
|---|---|---|
| 204909 | NY | Clinical Cardiac Electrophysiology… primary |
| 204909-1 | NY | Cardiovascular Disease Physician |
This provider holds licence 204909 issued in NY. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Clinical Cardiac Electrophysiology covers
A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them. NUCC Health Care Provider Taxonomy, code 207RC0001X
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 | |
|---|---|---|---|---|
| 207RC0001X | Clinical Cardiac Electrophysiology Physician Clinical Cardiac Electrophysiology | 204909 | NY | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 204909-1 | NY |
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 | 1821081878 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 25, 2005 |
| Last updated | Dec 21, 2011 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
MOUNT SINAI MEDICAL CENTER 5 EAST 98TH STREET, 3RD FLOOR New York, NY 10029 (212) 241-7272 Fax (212) 534-2776 |
| Other identifiers |
02414771
· 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 | 8 | 2 | 1 | 0 | 8 | 1 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 4 | 1 | 0 | 8 | 2 | 8 | 5 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
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.