Rob Ashby, M.D.
Rob Ashby, M.D. is an Addiction Medicine (Preventive Medicine) Physician in Prescott, AZ, registered under NPI 1174690606. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 3636 CROSSINGS DR, Prescott, AZ 86305. 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 |
|---|---|---|
| 13504 | AZ | Addiction Medicine (Preventive Medicine)… primary |
| 13504 | AZ | Addiction Medicine (Anesthesiology)… |
| 13504 | AZ | Pain Medicine (Anesthesiology) Physician |
| 13504 | AZ | General Practice Physician |
This provider holds licence 13504 issued in AZ. 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 Addiction Medicine covers
A physician engaged in the subspecialty practice of Addiction Medicine who specializes in the prevention, evaluation, diagnosis, treatment, and recovery of persons with the disease of addiction. NUCC Health Care Provider Taxonomy, code 2083A0300X
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 | |
|---|---|---|---|---|
| 2083A0300X | Addiction Medicine (Preventive Medicine) Physician Addiction Medicine | 13504 | AZ | primary |
| 207LA0401X | Addiction Medicine (Anesthesiology) Physician Addiction Medicine | 13504 | AZ | |
| 207LP2900X | Pain Medicine (Anesthesiology) Physician Pain Medicine | 13504 | AZ | |
| 208D00000X | General Practice Physician | 13504 | 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 | 1174690606 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 29, 2006 |
| Last updated | May 16, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
3636 CROSSINGS DR Prescott, AZ 86305 (928) 778-5097 Fax (407) 633-7536 |
| Mailing address |
2238 W MOUNTAIN OAK RD Prescott, AZ 86305 |
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 | 7 | 4 | 6 | 9 | 0 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 5 | 4 | 3 | 9 | 0 | 6 | 0 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.