WILLIAM MARTIN GREENSTADT, PH.D.
NPI 1922021559, an individual provider in NEW YORK, NY 10016.
- NPI
- 1922021559
- Entity type
- Individual (type 1)
- Status
- Active
- Practice location
- NEW YORK, NY 10016
- Enumerated
- 2006-07-25
- Last updated
- 2025-09-11
curl https://api.healthcare.dev/v1/providers/1922021559 \ -H "Authorization: Bearer $HDEV_API_KEY"
NPPES
Taxonomy codes
- 103TP0814X Primary
- 103T00000X
Codes from the Health Care Provider Taxonomy code set; their names belong to the NUCC and aren't shown here.
Official record
The CMS NPI Registry is the official source for this NPI: NPI 1922021559 in the NPI Registry.
Use it
Look up 1922021559 from code or an agent
curl https://api.healthcare.dev/v1/providers/1922021559 \ -H "Authorization: Bearer $HDEV_API_KEY"
Using the healthcare.dev MCP server, look up NPI 1922021559. Tell me the provider's name, whether it is an individual or an organization, whether the NPI is active, its taxonomy codes and its practice city and state.
Source: CMS NPPES file, release 2026-11. Public (FOIA-disclosable). Registry data as CMS publishes it, not a verification of credentials, licensure or enrollment.