Active NPI
William Holland, PHD
- Clinical Psychologist
- New York, NY
National Provider Identifier
1265373203
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Psychologist
- License
- 028118
- Practice address
- 300 Central Park W Apt 1C
New York, NY 10024-1590 - Phone
- (917) 848-0305
- NPI assigned
- Apr 3, 2026
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Clinical Psychologist | 103TC0700X | 028118 | NY | Primary |
Addresses
Primary practice location
300 Central Park W Apt 1C
New York, NY 10024-1590
Mailing address
300 Central Park W Apt 1C
New York, NY 10024-1590
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
- Credentials
- Doctor of Philosophy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 028118 | NY | MD | Clinical Psychologist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1775174400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1775174400000",
"number": "1265373203",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "300 CENTRAL PARK W APT 1C",
"city": "NEW YORK",
"state": "NY",
"postal_code": "100241590"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "300 CENTRAL PARK W APT 1C",
"city": "NEW YORK",
"state": "NY",
"postal_code": "100241590",
"telephone_number": "917-848-0305"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HOLLAND",
"first_name": "WILLIAM",
"credential": "PHD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2026-04-03",
"last_updated": "2026-04-03",
"certification_date": "2026-04-03",
"status": "A"
},
"taxonomies": [
{
"code": "103TC0700X",
"taxonomy_group": "",
"desc": "Psychologist, Clinical",
"state": "NY",
"license": "028118",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in New York, NY
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 3, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.