Dr. William T Marshall, DO
Dr. William T Marshall is a Surgical Critical Care Physician provider (Surgery) practicing in Valhalla, NY, registered in the NPPES registry with NPI 1174533061 since 2006. The credential DO stands for Doctor of Osteopathic Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1174533061 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. William T Marshall |
| Credential | DO |
| Sex | Male |
| Practice address | 100 WOODS RD # A, Valhalla, NY, 10595 |
| Phone | 9144937000 |
| Enumeration date | 2006-08-09 |
| Last updated in NPPES | 2019-01-24 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Secondary | 044420 | CT |
| 174400000X | Specialist | Secondary | 044420 | CT |
| 2086S0102X | Surgical Critical Care Physician | Primary | 296662 | NY |
DO — Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 296662 | Other | NY | NYS LICENSE |
Copy-ready billing details
Provider: William Marshall, DO NPI: 1174533061 Taxonomy: 2086S0102X (Surgical Critical Care Physician) Address: 100 WOODS RD # A, Valhalla, NY, 10595
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1740380641 | Joseph Turkowski | Individual | Surgery Physician | Valhalla, NY |
| 1992898217 | Ryan Malcom | Individual | Surgical Critical Care Physician | Valhalla, NY |
| 1558548719 | Carrie Muh | Individual | Neurological Surgery Physician | Valhalla, NY |
| 1376776153 | Fawaz Al-Mufti | Individual | Neurology Physician | Valhalla, NY |
| 1790099083 | Jared Pisapia | Individual | Neurological Surgery Physician | Valhalla, NY |
| 1629369491 | Grace Pinto Britton | Individual | Child & Adolescent Psychiatry Physician | Valhalla, NY |
| 1619268448 | Sana Ali | Individual | Neuroradiology Physician | Valhalla, NY |
| 1548655889 | Christeena Forte | Individual | Vascular Neurology Physician | Valhalla, NY |
Verify this record
Cross-check NPI 1174533061 against the authoritative CMS record: view Dr. William T Marshall 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 2019-01-24.