Mark Alexander, MD
Mark Alexander, MD is a Pediatric Cardiology Physician in Scarborough, ME, registered under NPI 1013907666. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 71 US ROUTE 1 STE C, Scarborough, ME 04074. 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 |
|---|---|---|
| MD22858 | ME | Pediatric Cardiology Physician primary |
| 77492 | MA | Pediatric Cardiology Physician |
| 77492 | MA | Clinical Cardiac Electrophysiology… |
| MD22858 | ME | Clinical Cardiac Electrophysiology… |
| MD22858 | ME | Pediatrics Physician |
| MD22858 | ME | Adult Congenital Heart Disease Physician |
Licences are recorded in 2 states: ME, MA. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Pediatric Medicine
- PAC ID
- 8325100910
Medicare enrolment is recorded as approved under the provider type Practitioner - Pediatric 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.
Licensed in 2 states
This provider holds licences in 2 states: Massachusetts and Maine. The practice address on file is in Scarborough, ME, 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
- MD22858
- Specialty
- Pediatric Cardiology 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 Pediatric Cardiology covers
A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease. NUCC Health Care Provider Taxonomy, code 2080P0202X
All registered taxonomy codes
This provider registers 6 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2080P0202X | Pediatric Cardiology Physician Pediatric Cardiology | MD22858 | ME | primary |
| 2080P0202X | Pediatric Cardiology Physician Pediatric Cardiology | 77492 | MA | |
| 207RC0001X | Clinical Cardiac Electrophysiology Physician Clinical Cardiac Electrophysiology | 77492 | MA | |
| 207RC0001X | Clinical Cardiac Electrophysiology Physician Clinical Cardiac Electrophysiology | MD22858 | ME | |
| 208000000X | Pediatrics Physician | MD22858 | ME | |
| 207RA0002X | Adult Congenital Heart Disease Physician Adult Congenital Heart Disease | MD22858 | ME |
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 | 1013907666 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 25, 2005 |
| Last updated | Feb 23, 2026 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
71 US ROUTE 1 STE C Scarborough, ME 04074 (207) 883-5532 Fax (207) 883-5552 |
| Other identifiers |
3183467
(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 | 0 | 1 | 3 | 9 | 0 | 7 | 6 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 2 | 3 | 9 | 0 | 5 | 6 | 3 |
Sum = 54 · next multiple of 10 = 60 · 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.