Allen Tham, MD
Allen Tham, MD is an Orthopaedic Hand Surgery Physician in Fullerton, CA, registered under NPI 1578715801. 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 2141 N HARBOR BLVD SUITE 35000, Fullerton, CA 92835. 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 |
|---|---|---|
| A110804 | CA | Orthopaedic Hand Surgery Physician primary |
| MT185928 | PA | Orthopaedic Surgery Physician |
Licences are recorded in 2 states: CA, PA. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Hand Surgery
- PAC ID
- 0941479182
- Enrollment ID
- I20110804000586
Medicare enrolment is recorded as approved under the provider type Practitioner - Hand Surgery. 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: California and Pennsylvania. The practice address on file is in Fullerton, CA, 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
- A110804
- Specialty
- Orthopaedic Hand Surgery 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 Hand Surgery covers
An orthopaedic surgeon trained in the investigation, preservation and restoration by medical, surgical and rehabilitative means of all structures of the upper extremity directly affecting the form and function of the hand and wrist. NUCC Health Care Provider Taxonomy, code 207XS0106X
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 | |
|---|---|---|---|---|
| 207XS0106X | Orthopaedic Hand Surgery Physician Hand Surgery | A110804 | CA | primary |
| 207X00000X | Orthopaedic Surgery Physician | MT185928 | 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 | 1578715801 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 17, 2008 |
| Last updated | Apr 30, 2013 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
2141 N HARBOR BLVD SUITE 35000 Fullerton, CA 92835 (714) 626-8630 Fax (714) 626-8659 |
| Mailing address |
279 IMPERIAL HWY SUITE 730 Fullerton, CA 92835 |
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 | 5 | 7 | 8 | 7 | 1 | 5 | 8 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 5 | 8 | 5 | 1 | 1 | 8 | 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.