John Thomas Greenfield, MD
John Thomas Greenfield is a General Practice Physician provider (General Practice) practicing in Bronx, NY, registered in the NPPES registry with NPI 1730960451 since 2023. The credential MD stands for Doctor of Medicine. Practices at Grand Manor Health Related Facility Inc. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1730960451 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John Thomas Greenfield |
| Credential | MD |
| Sex | Male |
| Practice address | Bronx, NY, 10473 |
| Phone | 7185837736 |
| Fax | 7185376180 |
| Enumeration date | 2023-10-09 |
| Last updated in NPPES | 2023-10-09 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208D00000X | General Practice Physician | Primary | P124990 | NY |
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: John Greenfield, MD NPI: 1730960451 Taxonomy: 208D00000X (General Practice Physician) Address: Bronx, NY, 10473
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1588667125 | Grand Manor Health Related Facility Inc. | Organization | Skilled Nursing Facility | Bronx, NY |
| 1851583959 | Suzanne Velez-Perez | Individual | Occupational Therapist | Bronx, NY |
Verify this record
Cross-check NPI 1730960451 against the authoritative CMS record: view John Thomas Greenfield 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 2023-10-09.