William Marshall, MD
William Marshall, MD is an Adult Congenital Heart Disease Physician in Columbus, OH, registered under NPI 1407274301. 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 452 W 10TH AVE, Columbus, OH 43210. 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 |
|---|---|---|
| 35.127708 | OH | Adult Congenital Heart Disease Physician primary |
| 35.127708 | OH | Pediatrics Physician |
| 35.127708 | OH | Cardiovascular Disease Physician |
This provider holds licence 35.127708 issued in OH. 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 - Cardiovascular Disease (cardiology)
- PAC ID
- 9234198565
- Enrollment ID
- I20230705001869
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.
What Adult Congenital Heart Disease covers
A physician who specializes in the care and treatment of adults with congenital heart disease. Adult congenital heart disease (ACHD) physicians are trained to understand the complexities of congenital heart disease, anatomy, physiology, surgical repairs, and long-term complications and use that to manage ACHD with acquired heart disease, including heart failure, arrhythmias, and pulmonary hypertension. NUCC Health Care Provider Taxonomy, code 207RA0002X
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 | |
|---|---|---|---|---|
| 207RA0002X | Adult Congenital Heart Disease Physician Adult Congenital Heart Disease | 35.127708 | OH | primary |
| 208000000X | Pediatrics Physician | 35.127708 | OH | |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 35.127708 | OH |
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 | 1407274301 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 29, 2014 |
| Last updated | Apr 20, 2026 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
452 W 10TH AVE Columbus, OH 43210 (614) 293-7677 Fax (614) 293-5614 |
| Mailing address |
700 ACKERMAN RD STE 2120 Columbus, OH 43202 |
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 | 0 | 7 | 2 | 7 | 4 | 3 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 0 | 7 | 4 | 7 | 8 | 3 | 0 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.