Alison Alexander, MD
Alison Alexander, MD is a Geriatric Medicine (Internal Medicine) Physician in Narbeth, PA, registered under NPI 1215096243.
Getting there
The practice address on file is MAINLINE MEDICAL GROUP 857 MONTGOMERY AVENUE, Narbeth, PA 19072. 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 |
|---|---|---|
| MD056081-L | PA | Geriatric Medicine (Internal Medicine)… primary |
This provider holds licence MD056081-L issued in PA. 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 - Internal Medicine
- PAC ID
- 2264534684
Medicare enrolment is recorded as approved under the provider type Practitioner - Internal Medicine. 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 Geriatric Medicine covers
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital. NUCC Health Care Provider Taxonomy, code 207RG0300X
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 | 1215096243 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 6, 2006 |
| Last updated | Mar 8, 2024 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
MAINLINE MEDICAL GROUP 857 MONTGOMERY AVENUE Narbeth, PA 19072 (610) 664-2951 Fax (610) 664-2131 |
| Mailing address |
PO BOX 820933 Phila, PA 19182 |
| Other identifiers |
1957179
· HBS (PA) 2836592000 · IBC/KHPE/PC (PA) 1855795 · CIGNA PIN (PA) 2053189 · UNITED HEALTHCARE (PA) 597586 · MEDICARE GROUP (PA) P00721294 · RR MEDICARE (PA) 5552322 · AETNA PIN (PA) 102117408 (PA) 3Y6260 · HEALTH NET (PA) |
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 | 2 | 1 | 5 | 0 | 9 | 6 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 2 | 5 | 0 | 9 | 3 | 2 | 8 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.