Essa Hattar, MD
Essa Hattar, MD is a Family Medicine Physician in Pontiac, MI, registered under NPI 1003591926. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Pontiac, based on OpenStreetMap data collected Sep 17, 2026. Parking is available about 402 ft away. The nearest transit stop is 981 ft away, served by Water / Phoenix Center (EB).
Getting here and what is nearby
Transit Huron / Mill (WB) 284 ft ~2 min
Parking 345 ft ~2 min
Parking 381 ft ~2 min
Parking 402 ft ~2 min
Transit Perry / Pike (NB) 510 ft ~2 min
Gas station Mobil 774 ft ~3 min
Convenience Mobil Mart 831 ft ~4 min
Transit Water / Phoenix Center (EB) 981 ft ~4 min
Convenience Star Party Store 0.35 mi ~8 min
84 Auburn Avenue, Pontiac 48342
Convenience Saado Party Store 0.49 mi ~10 min
324 North Perry Street, Pontiac 48342
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 4031512896 | MI | Family Medicine Physician primary |
| 4351050811 | MI | Internal Medicine Physician |
| 4031512896 | MI | General Practice Physician |
This provider holds licence 4031512896 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
- 9032573829
- Enrollment ID
- I20241024003407
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 Family Medicine covers
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity. NUCC Health Care Provider Taxonomy, code 207Q00000X
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 | |
|---|---|---|---|---|
| 207Q00000X | Family Medicine Physician | 4031512896 | MI | primary |
| 207R00000X | Internal Medicine Physician | 4351050811 | MI | |
| 208D00000X | General Practice Physician | 4031512896 | 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 | 1003591926 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 19, 2023 |
| Last updated | Dec 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
50 N PERRY ST Pontiac, MI 48342 (248) 338-5392 |
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 | 0 | 0 | 3 | 5 | 9 | 1 | 9 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 9 | 2 | 9 | 4 |
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.