Active NPI
William Llerena Thelmo, M.D.
- Cytopathology Physician
- Brooklyn, NY
National Provider Identifier
1992762702
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Cytopathology Physician
- License
- 116828
- Practice address
- 374 Stockholm St
C/O Faculty Practice
Brooklyn, NY 11237-4006 - Phone
- (718) 963-6551
- Fax
- (718) 963-6793
- NPI assigned
- Apr 26, 2006
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Cytopathology Physician | 207ZC0500X | 116828 | NY | Primary |
| Anatomic Pathology & Clinical Pathology Physician | 207ZP0102X | 116828 | NY |
Addresses
Primary practice location
374 Stockholm St
C/O Faculty Practice
Brooklyn, NY 11237-4006
Mailing address
374 Stockholm St
C/O Faculty Practice
Brooklyn, NY 11237-4006
Phone (718) 963-6551
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)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 116828 | NY | MD | Anatomic Pathology & Clinical Pathology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Wyckoff Medical Services, P C | Past | Accepting new patients |
Interoperability endpoints
- wthelmo563059@nychhc.direct-ci.com
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Internal Medicine Physician
- Brooklyn, NY
- NPI 1558308411
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1146009600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1992762702",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "374 STOCKHOLM ST",
"address_2": "C/O FACULTY PRACTICE",
"city": "BROOKLYN",
"state": "NY",
"postal_code": "112374006",
"telephone_number": "718-963-6551",
"fax_number": "718-963-6793"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "374 STOCKHOLM ST",
"address_2": "C/O FACULTY PRACTICE",
"city": "BROOKLYN",
"state": "NY",
"postal_code": "112374006",
"telephone_number": "718-963-6551",
"fax_number": "718-963-6793"
}
],
"practiceLocations": [],
"basic": {
"last_name": "THELMO",
"first_name": "WILLIAM",
"middle_name": "LLERENA",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-04-26",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207ZC0500X",
"taxonomy_group": "",
"desc": "Pathology, Cytopathology",
"state": "NY",
"license": "116828",
"primary": true
},
{
"code": "207ZP0102X",
"taxonomy_group": "",
"desc": "Pathology, Anatomic Pathology & Clinical Pathology",
"state": "NY",
"license": "116828",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Brooklyn, NY
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.