Shaw Natan, M.D.
Shaw Natan, M.D. is a Clinical Cardiac Electrophysiology Physician in Brighton, MA, registered under NPI 1669688784. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 736 CAMBRIDGE ST, 4TH FL CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S, Brighton, MA 02135. 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 |
|---|---|---|
| 235960 | MA | Clinical Cardiac Electrophysiology… primary |
| MD422744 | PA | Cardiovascular Disease Physician |
| 235960 | MA | Cardiovascular Disease Physician |
Licences are recorded in 2 states: MA, PA. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Cardiovascular Disease (cardiology)
- PAC ID
- 6204929672
- Enrollment ID
- I20090203000416
Medicare enrolment is recorded as approved under the provider type Practitioner - Cardiovascular Disease (cardiology). Being enrolled means the provider can bill Medicare; 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 Pennsylvania. The practice address on file is in Brighton, 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
- 235960
- Specialty
- Clinical Cardiac Electrophysiology…
- Licence
- MD422744
- Specialty
- Cardiovascular Disease 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 Clinical Cardiac Electrophysiology covers
A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them. NUCC Health Care Provider Taxonomy, code 207RC0001X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RC0001X | Clinical Cardiac Electrophysiology Physician Clinical Cardiac Electrophysiology | 235960 | MA | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | MD422744 | PA | |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 235960 | 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 | 1669688784 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 15, 2007 |
| Last updated | Feb 18, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
736 CAMBRIDGE ST, 4TH FL CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S Brighton, MA 02135 (617) 562-7690 Fax (617) 562-7699 |
| Mailing address |
960 MASSACHUSETTS AVE FL 2 Boston, MA 02118 |
| Other identifiers |
110081667A
· Medicaid (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 | 6 | 6 | 9 | 6 | 8 | 8 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 3 | 9 | 3 | 8 | 7 | 7 | 7 |
Sum = 76 · next multiple of 10 = 80 · check digit = 4 · actual last digit = 4
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.