Dallyn Udall, DO
Dallyn Udall, DO is an Adult Reconstructive Orthopaedic Surgery Physician in Gilbert, AZ, registered under NPI 1164088605. 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 2940 E BANNER GATEWAY DR STE 200-250, Gilbert, AZ 85234. 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 |
|---|---|---|
| 011544 | AZ | Adult Reconstructive Orthopaedic Surgery… primary |
| 20A19340 | CA | Orthopaedic Surgery Physician |
| 20A19340 | CA | Adult Reconstructive Orthopaedic Surgery… |
| 011544 | AZ | Orthopaedic Surgery Physician |
Licences are recorded in 2 states: AZ, CA. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Orthopedic Surgery
- PAC ID
- 3971975152
Medicare enrolment is recorded as approved under the provider type Practitioner - Orthopedic 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.
Licensed in 2 states
This provider holds licences in 2 states: Arizona and California. The practice address on file is in Gilbert, AZ, 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
- 011544
- Specialty
- Adult Reconstructive Orthopaedic…
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 Adult Reconstructive Orthopaedic Surgery covers
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures. NUCC Health Care Provider Taxonomy, code 207XS0114X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207XS0114X | Adult Reconstructive Orthopaedic Surgery Physician Adult Reconstructive Orthopaedic Surgery | 011544 | AZ | primary |
| 207X00000X | Orthopaedic Surgery Physician | 20A19340 | CA | |
| 207XS0114X | Adult Reconstructive Orthopaedic Surgery Physician Adult Reconstructive Orthopaedic Surgery | 20A19340 | CA | |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — | |
| 207X00000X | Orthopaedic Surgery Physician | 011544 | AZ |
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 | 1164088605 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 9, 2019 |
| Last updated | May 2, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | DO |
| Practice address |
2940 E BANNER GATEWAY DR STE 200-250 Gilbert, AZ 85234 (602) 648-5444 Fax (602) 772-3801 |
| Mailing address |
PO BOX 80217 Phoenix, AZ 85060 |
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 | 6 | 4 | 0 | 8 | 8 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 3 | 4 | 0 | 8 | 7 | 6 | 0 |
Sum = 55 · next multiple of 10 = 60 · 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.