John M Hartzell, M.D.
John M Hartzell is a Surgery Physician provider (Surgery) practicing in Grosse Pointe, MI, registered in the NPPES registry with NPI 1851383921 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1851383921 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John M Hartzell |
| Credential | M.D. |
| Sex | Male |
| Practice address | 468 CADIEUX RD, Grosse Pointe, MI, 48230 |
| Phone | 3134731968 |
| Enumeration date | 2005-08-16 |
| Last updated in NPPES | 2023-09-20 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Primary | 4301022886 | MI |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 4583789 | Medicaid | MI | — |
Copy-ready billing details
Provider: John Hartzell, M.D. NPI: 1851383921 Taxonomy: 208600000X (Surgery Physician) Address: 468 CADIEUX RD, Grosse Pointe, MI, 48230
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1205834470 | Manaf Madoun | Individual | Hospitalist Physician | Grosse Pointe, MI |
| 1093701963 | Beaumont Pharmacy and Health Services Inc | Organization | Community/Retail Pharmacy | Grosse Pointe, MI |
| 1447232269 | Lenore Ranieri | Individual | Nurse Practitioner | Grosse Pointe, MI |
| 1942270046 | Rickey Courtney | Individual | Emergency Medical Services (Emergency Medicine) Physician | Grosse Pointe, MI |
| 1457321499 | Mark Sadzikowski | Individual | Emergency Medicine Physician | Grosse Pointe, MI |
| 1245200286 | David Schleif | Individual | Emergency Medical Services (Emergency Medicine) Physician | Grosse Pointe, MI |
| 1326011966 | Jon Spyridakis | Individual | Emergency Medicine Physician | Grosse Pointe, MI |
| 1184691057 | Julie Amicucci | Individual | Physician Assistant | Grosse Pointe, MI |
Verify this record
Cross-check NPI 1851383921 against the authoritative CMS record: view John M Hartzell on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-09-20.