Dr. William Stewart Steinhardt Jr., MD
Dr. William Stewart Steinhardt Jr. is a Surgery Physician provider (Surgery) practicing in Marrero, LA, registered in the NPPES registry with NPI 1811286610 since 2011. The credential MD stands for Doctor of Medicine. Practices at Gulf Coast Medical Management (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1811286610 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. William Stewart Steinhardt Jr. |
| Credential | MD |
| Sex | Male |
| Practice address | 1200 AVENUE G, Marrero, LA, 70072 |
| Phone | 5043496713 |
| Enumeration date | 2011-04-01 |
| Last updated in NPPES | 2018-03-17 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Primary | 206158 | LA |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: William Steinhardt, MD NPI: 1811286610 Taxonomy: 208600000X (Surgery Physician) Address: 1200 AVENUE G, Marrero, LA, 70072
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1326043084 | Charles Thomas | Individual | Surgery Physician | Marrero, LA |
| 1215985213 | Robert Cummiskey | Individual | Surgery Physician | Marrero, LA |
| 1952486987 | Otholino Remedios | Individual | Pediatric Adolescent Medicine Physician | Marrero, LA |
| 1225200298 | Gulf Coast Medical Management | Organization | Family Medicine Physician | Marrero, LA |
| 1598010589 | Jayme Boudreaux | Individual | Family Nurse Practitioner | Marrero, LA |
Verify this record
Cross-check NPI 1811286610 against the authoritative CMS record: view Dr. William Stewart Steinhardt Jr. 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 2018-03-17.