Active NPI
Karyn Boyar, NP
- Nurse Practitioner
- New York, NY
National Provider Identifier
1285625798
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Nurse Practitioner
- License
- F333770
- Practice address
- 10 Union SQ E
New York, NY 10003-3314 - Phone
- (212) 844-8888
- NPI assigned
- Nov 3, 2005
- Sex
- Female
- Sole proprietor
- No
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 |
|---|---|---|---|---|
| Nurse Practitioner | 363L00000X | F333770 | NY | Primary |
Addresses
Primary practice location
10 Union SQ E
New York, NY 10003-3314
Mailing address
PO Box 5806
New York, NY 10087-5806
Phone (212) 256-3539
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 02377420 | Medicaid | NY |
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
- Nurse Practitioner
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| F333770 | NY | MD | Nurse Practitioner |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Icahn School of Medicine at Mount Sinai | Past | Accepting new patients | |
| Mount Sinai School of Medicine - Dept. of Neurology | Past | Accepting new patients |
Organizations & group practices 2
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.
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- NPI 1558627844
-
- Specialist
- New York, NY
- NPI 1003832924
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1130976000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1285625798",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 5806",
"city": "NEW YORK",
"state": "NY",
"postal_code": "100875806",
"telephone_number": "212-256-3539"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "10 UNION SQ E",
"city": "NEW YORK",
"state": "NY",
"postal_code": "100033314",
"telephone_number": "212-844-8888"
}
],
"practiceLocations": [],
"basic": {
"last_name": "BOYAR",
"first_name": "KARYN",
"credential": "NP",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2005-11-03",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "363L00000X",
"taxonomy_group": "",
"desc": "Nurse Practitioner",
"state": "NY",
"license": "F333770",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "02377420",
"state": "NY"
}
],
"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 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.