Donald Siddoway, MD
Donald Siddoway, MD is a Clinical Cardiac Electrophysiology Physician in Columbia, SC, registered under NPI 1235392093. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 8 RICHLAND MEDICAL PARK DR STE 200, Columbia, SC 29203. 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 |
|---|---|---|
| 86722 | SC | Clinical Cardiac Electrophysiology… primary |
| MD442073 | PA | Internal Medicine Physician |
| 27143 | WV | Cardiovascular Disease Physician |
| 27143 | WV | Clinical Cardiac Electrophysiology… |
Licences are recorded in 3 states: SC, PA, WV. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Cardiac Electrophysiology
- PAC ID
- 5092939827
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Pennsylvania | I20140617001043 | Practitioner - Cardiac Electrophysiology |
| South Carolina | I20220331000057 | Practitioner - Cardiac Electrophysiology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Cardiac Electrophysiology. There are 2 separate enrolment records across 2 states (PA, SC). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 3 states
This provider holds licences in 3 states: Pennsylvania, South Carolina and West Virginia. The practice address on file is in Columbia, SC, 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
- 86722
- Specialty
- Clinical Cardiac Electrophysiology…
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 4 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 | 86722 | SC | primary |
| 207R00000X | Internal Medicine Physician | MD442073 | PA | |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 27143 | WV | |
| 207RC0001X | Clinical Cardiac Electrophysiology Physician Clinical Cardiac Electrophysiology | 27143 | WV |
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 | 1235392093 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 2, 2008 |
| Last updated | Mar 23, 2022 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
8 RICHLAND MEDICAL PARK DR STE 200 Columbia, SC 29203 (803) 256-6511 Fax (803) 376-5885 |
| Mailing address |
PO BOX 743904 Atlanta, GA 30374 |
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 | 3 | 5 | 3 | 9 | 2 | 0 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 6 | 5 | 6 | 9 | 4 | 0 | 9 |
Sum = 67 · next multiple of 10 = 70 · 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.