John Watt, M.S.
John Watt, M.S. is a Surgical Critical Care Physician in Chandler, AZ, registered under NPI 1780849968. This provider registers 3 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 485 S DOBSON RD STE 201, Chandler, AZ 85224. 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 |
|---|---|---|
| 50769 | AZ | Surgical Critical Care Physician primary |
| 50769 | AZ | Trauma Surgery Physician |
| 50769 | AZ | Surgery Physician |
This provider holds licence 50769 issued in AZ. 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 - General Surgery
- PAC ID
- 2769788678
- Enrollment ID
- I20160302001736
Medicare enrolment is recorded as approved under the provider type Practitioner - General 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.
What Surgical Critical Care covers
A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists. NUCC Health Care Provider Taxonomy, code 2086S0102X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2086S0102X | Surgical Critical Care Physician Surgical Critical Care | 50769 | AZ | primary |
| 2086S0127X | Trauma Surgery Physician Trauma Surgery | 50769 | AZ | |
| 208600000X | Surgery Physician | 50769 | 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 | 1780849968 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 27, 2008 |
| Last updated | Aug 29, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.S. |
| Practice address |
485 S DOBSON RD STE 201 Chandler, AZ 85224 (480) 728-4700 Fax (480) 728-4747 |
| Mailing address |
PO BOX 33269 Phoenix, AZ 85067 |
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 | 7 | 8 | 0 | 8 | 4 | 9 | 9 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 7 | 0 | 7 | 4 | 9 | 9 | 3 |
Sum = 72 · next multiple of 10 = 80 · check digit = 8 · actual last digit = 8
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.