Philip O'halloran, M.D.
Philip O'halloran, M.D. is an Occupational Medicine Physician in Warren, MI, registered under NPI 1306939285. 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 11800 E 12 MILE RD, Warren, MI 48093. 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 |
|---|---|---|
| 4301407335 | MI | Occupational Medicine Physician primary |
| 4301407335 | MI | Emergency Medicine Physician |
| 4301407335 | MI | Family Medicine Physician |
| 4301407335 | MI | Preventive Medicine/Occupational… |
This provider holds licence 4301407335 issued in MI. 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 Practice
- PAC ID
- 4385728070
- Enrollment ID
- I20080219000554
Medicare enrolment is recorded as approved under the provider type Practitioner - General Practice. 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 Occupational Medicine covers
Occupational medicine focuses on the health of workers, including the ability to perform work; the physical, chemical, biological, and social environments of the workplace; and the health outcomes of environmental exposures. Practitioners in this field address the promotion of health in the work place, and the prevention and management of occupational and environmental injury, illness, and disability. NUCC Health Care Provider Taxonomy, code 2083X0100X
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 | |
|---|---|---|---|---|
| 2083X0100X | Occupational Medicine Physician Occupational Medicine | 4301407335 | MI | primary |
| 207P00000X | Emergency Medicine Physician | 4301407335 | MI | |
| 207Q00000X | Family Medicine Physician | 4301407335 | MI | |
| 2083P0500X | Preventive Medicine/Occupational Environmental Medicine Physician Preventive Medicine/Occupational Environmental Medicine | 4301407335 | MI |
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 | 1306939285 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 2, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
11800 E 12 MILE RD Warren, MI 48093 (586) 573-5059 |
| Mailing address |
1000 JOANNE CT Bloomfield, MI 48302 |
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 | 3 | 0 | 6 | 9 | 3 | 9 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 0 | 6 | 9 | 3 | 9 | 2 | 7 |
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.