Elizabeth Castronovo, AGNP-BC
Elizabeth Castronovo, AGNP-BC is an Adult Health Nurse Practitioner in Boston, MA, registered under NPI 1184012221. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 133 BROOKLINE AVE GASTROENTEROLOGY, Boston, MA 02215. 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 |
|---|---|---|
| 261552 | MA | Adult Health Nurse Practitioner primary |
| 261552 | MA | Gerontology Nurse Practitioner |
This provider holds licence 261552 issued in MA. 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 - Nurse Practitioner
- PAC ID
- 6507183803
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Adult Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LA2200X
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 | |
|---|---|---|---|---|
| 363LA2200X | Adult Health Nurse Practitioner Adult Health | 261552 | MA | primary |
| 363LG0600X | Gerontology Nurse Practitioner Gerontology | 261552 | MA |
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 | 1184012221 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 23, 2014 |
| Last updated | Dec 23, 2014 |
| Status | Active |
| Sole proprietor | No |
| Credential | AGNP-BC |
| Practice address |
133 BROOKLINE AVE GASTROENTEROLOGY Boston, MA 02215 (671) 421-1380 |
| Mailing address |
26 LLOYD ST Winchester, MA 01890 |
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 | 8 | 4 | 0 | 1 | 2 | 2 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 7 | 4 | 0 | 1 | 4 | 2 | 4 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.