Individual provider Active NPI

Kristen Grandmaison, P.A.

  • Physician Assistant
  • Somerset, NJ
National Provider Identifier
1891199022
Registry record updated Dec 29, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
25MP00348000 Issued in NJ
Practice address
1543 NJ-27
Suite 21
Somerset, NJ 08873
Phone
(732) 873-6863
NPI assigned
Oct 17, 2014
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Dec 29, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 006229 NY
Physician Assistant 363A00000X 25MP00348000 NJ Primary

Addresses

Primary practice location

1543 NJ-27
Suite 21
Somerset, NJ 08873

Mailing address

1543 NJ-27
Suite 21
Somerset, NJ 08873
Phone (732) 873-6863

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NJ
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20141230001951 NJ Practitioner - Physician Assistant 1759604580 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 1996
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
ENT and Allergy Associates LLPGroup PAC ID 0749193662, 431 clinicians

Practice addresses (Care Compare)

1543 Route 27
Suite 21
Somerset, NJ 08873-4015
Phone (732) 873-6863

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
006229NYMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
ENT and Allergy Associates LLP CurrentSince Jan 12, 2026 Accepting new patients

Locations

1543 State Route 27
Ste 21
Somerset, NJ 08873
Phone (732) 873-6863

1211 Hamburg Tpke
Ste 205
Wayne, NJ 07470
Phone (973) 633-0808

Interoperability endpoints

  • FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/

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.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1413504000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766966400000",
    "number": "1891199022",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1543 NJ-27",
            "address_2": "SUITE 21",
            "city": "SOMERSET",
            "state": "NJ",
            "postal_code": "08873",
            "telephone_number": "732-873-6863"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1543 NJ-27",
            "address_2": "SUITE 21",
            "city": "SOMERSET",
            "state": "NJ",
            "postal_code": "08873",
            "telephone_number": "732-873-6863"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRANDMAISON",
        "first_name": "KRISTEN",
        "name_prefix": "Mrs.",
        "credential": "P.A.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2014-10-17",
        "last_updated": "2025-12-29",
        "certification_date": "2025-12-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NY",
            "license": "006229",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NJ",
            "license": "25MP00348000",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Somerset, NJ

Sources for this page

Verify at the official NPI Registry.