Thomas Oconnor, DO
Thomas Oconnor, DO is a Vascular Surgery Physician in Lancaster, PA, registered under NPI 1144213992. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 2102 HARRISBURG PIKE, Lancaster, PA 17601. 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 |
|---|---|---|
| OS009572L | PA | Vascular Surgery Physician primary |
| OS009572L | PA | Surgery Physician |
This provider holds licence OS009572L 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 - Vascular Surgery
- PAC ID
- 4789623596
Medicare enrolment is recorded as approved under the provider type Practitioner - Vascular Surgery. 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 Vascular Surgery covers
A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart. NUCC Health Care Provider Taxonomy, code 2086S0129X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2086S0129X | Vascular Surgery Physician Vascular Surgery | OS009572L | PA | primary |
| 208600000X | Surgery Physician | OS009572L | PA |
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 | 1144213992 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 26, 2005 |
| Last updated | Jun 6, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | DO |
| Practice address |
2102 HARRISBURG PIKE Lancaster, PA 17601 (717) 544-9400 Fax (717) 544-9401 |
| Other identifiers |
50009563
· CAPITAL BLUE CROSS (PA) 20020201 · MERCY HEALTH PLAN (PA) 963231 · BLUE SHIELD OF PA 001602890 (PA) P00000115 · RAILROAD MEDICARE |
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 | 1 | 4 | 4 | 2 | 1 | 3 | 9 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 8 | 4 | 4 | 1 | 6 | 9 | 9 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
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.