Alan Penzias, M.D.
Alan Penzias, M.D. is a Reproductive Endocrinology Physician in Waltham, MA, registered under NPI 1497701866. 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 130 2ND AVE BOSTON IVF - THE WALTHAM CENTER, Waltham, MA 02451. 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 |
|---|---|---|
| 58565 | MA | Reproductive Endocrinology Physician primary |
| 272983 | NY | Reproductive Endocrinology Physician |
| 58565 | MA | Gynecology Physician |
| 015833 | ME | Gynecology Physician |
| MD11056 | RI | Gynecology Physician |
| 015833 | ME | Reproductive Endocrinology Physician |
| MD11056 | RI | Reproductive Endocrinology Physician |
Licences are recorded in 4 states: MA, NY, ME, RI. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Obstetrics/gynecology
- PAC ID
- 9335381987
Medicare enrolment is recorded as approved under the provider type Practitioner - Obstetrics/gynecology. 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.
Licensed in 4 states
This provider holds licences in 4 states: Massachusetts, Maine, New York and Rhode Island. The practice address on file is in Waltham, MA, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 58565
- Specialty
- Reproductive Endocrinology Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Reproductive Endocrinology covers
An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility. NUCC Health Care Provider Taxonomy, code 207VE0102X
All registered taxonomy codes
This provider registers 7 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207VE0102X | Reproductive Endocrinology Physician Reproductive Endocrinology | 58565 | MA | primary |
| 207VE0102X | Reproductive Endocrinology Physician Reproductive Endocrinology | 272983 | NY | |
| 207VG0400X | Gynecology Physician Gynecology | 58565 | MA | |
| 207VG0400X | Gynecology Physician Gynecology | 015833 | ME | |
| 207VG0400X | Gynecology Physician Gynecology | MD11056 | RI | |
| 207VE0102X | Reproductive Endocrinology Physician Reproductive Endocrinology | 015833 | ME | |
| 207VE0102X | Reproductive Endocrinology Physician Reproductive Endocrinology | MD11056 | RI |
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 | 1497701866 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 26, 2006 |
| Last updated | May 22, 2018 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
130 2ND AVE BOSTON IVF - THE WALTHAM CENTER Waltham, MA 02451 (781) 434-6500 Fax (781) 434-6501 |
| Other identifiers |
3095011
(MA) |
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 | 4 | 9 | 7 | 7 | 0 | 1 | 8 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 9 | 7 | 5 | 0 | 2 | 8 | 3 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.