Madeleine Fay, MD
Madeleine Fay, MD is an Endocrinology, Diabetes & Metabolism Physician in Worcester, MA, registered under NPI 1164413860. 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 425 N LAKE AVE, Worcester, MA 01605. 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 |
|---|---|---|
| 48500 | MA | Endocrinology, Diabetes & Metabolism… primary |
This provider holds licence 48500 issued in MA. 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 Endocrinology, Diabetes & Metabolism covers
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems. NUCC Health Care Provider Taxonomy, code 207RE0101X
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 | 1164413860 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 2, 2005 |
| Last updated | Jan 26, 2012 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
425 N LAKE AVE Worcester, MA 01605 (508) 595-2855 Fax (508) 595-2602 |
| Mailing address |
630 PLANTATION ST WOT 12TH FL ATTN PHYSICIAN SERVICES Worcester, MA 01605 |
| Other identifiers |
9900106
· Other 042472266 · Other 3099407 · Other 3300063 · Other J04439 · Other 042472266 · Other 042472266 · Other 26807 · Other 26807 · Other J04439 · Other 1592180 · Other 917696 · Other 5180602 · Other 784017 · Other AA4451 · Other J04439 · 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 | 1 | 6 | 4 | 4 | 1 | 3 | 8 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 3 | 4 | 8 | 1 | 6 | 8 | 3 |
Sum = 60 · next multiple of 10 = 60 · check digit = 0 · actual last digit = 0
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.