Thomas Mccallum, M.D.
Thomas Mccallum, M.D. is a Diagnostic Ultrasound Physician in Worland, WY, registered under NPI 1609896505. This provider registers 4 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 4005 15TH ST, Worland, WY 82401. 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 |
|---|---|---|
| 2647A | WY | Diagnostic Ultrasound Physician primary |
| 2647A | WY | Nuclear Radiology Physician |
| 2647A | WY | Diagnostic Radiology Physician |
| 2647A | WY | Vascular & Interventional Radiology… |
This provider holds licence 2647A issued in WY. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Diagnostic Ultrasound covers
A Radiology doctor of Osteopathy that specializes in Diagnostic Ultrasound. NUCC Health Care Provider Taxonomy, code 2085U0001X
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 | |
|---|---|---|---|---|
| 2085U0001X | Diagnostic Ultrasound Physician Diagnostic Ultrasound | 2647A | WY | primary |
| 2085N0904X | Nuclear Radiology Physician Nuclear Radiology | 2647A | WY | |
| 2085R0202X | Diagnostic Radiology Physician Diagnostic Radiology | 2647A | WY | |
| 2085R0204X | Vascular & Interventional Radiology Physician Vascular & Interventional Radiology | 2647A | WY |
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 | 1609896505 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 20, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
4005 15TH ST Worland, WY 82401 (307) 347-3221 |
| Mailing address |
PO BOX 6006 Riverton, WY 82501 |
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 | 0 | 9 | 8 | 9 | 6 | 5 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 0 | 9 | 7 | 9 | 3 | 5 | 0 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
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.