Individual provider Active NPI

Kathryn M Semmelrock, AGPCNP

  • Adult Health Nurse Practitioner
  • Hackensack, NJ
National Provider Identifier
1245756808
Registry record updated Feb 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Adult Health Nurse PractitionerTaxonomy code 363LA2200X
License
26NJ01049100 Issued in NJ
Practice address
20 Prospect Ave
Hackensack, NJ 07601-1997
Phone
(551) 996-4424
Fax
(551) 996-0831
NPI assigned
Aug 16, 2017
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 9, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Adult Health Nurse Practitioner 363LA2200X 308316 NY
Adult Health Nurse Practitioner 363LA2200X 26NJ01049100 NJ Primary

Addresses

Primary practice location

20 Prospect Ave
Hackensack, NJ 07601-1997

Mailing address

170 Maple Ave Ste 502
White Plains, NY 10601-4708
Phone (914) 948-1000

Other practice location 1

170 Maple Ave Ste 502
White Plains, NY 10601-4708
Phone (914) 948-1000

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY, NJ2 enrollments
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 2

Enrollment IDStateProvider typePAC IDDetails
I20171016000635 NY Practitioner - Nurse Practitioner 0446525638 Reassigns benefits to 1 organization
I20260210004412 NJ Practitioner - Nurse Practitioner 0446525638 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices

Practice addresses (Care Compare)

122 Maple Ave
FL 9
White Plains, NY 10601-4706
Phone (914) 948-1000

20 Prospect Ave
Hackensack, NJ 07601-1997
Phone (551) 996-5045

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
99.15 of 100Reported as group
Promoting interoperability
99
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

State licenses

LicenseStateTypeSpecialty
26NJ01049100NJMDAdult Health Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Hackensack Meridian Health Medical Group - Specialty Care PC CurrentSince Jan 29, 2026 Accepting new patients
White Plains Physician Services PC CurrentSince Jan 1, 2021 Accepting new patients
Hackensack Meridian Health Medical Group - Specialty Care PC CurrentSince Jan 29, 2026 Accepting new patients

Locations

30 Prospect Ave
Hackensack, NJ 07601
Phone (201) 488-0066

20 Prospect Ave
Hackensack, NJ 07601
Phone (201) 996-2816

99 Business Park Dr
Armonk, NY 10504
Phone (914) 219-8515

185 Kisco Ave
Ste 300
Mount Kisco, NY 10549
Phone (914) 242-2020

170 Maple Ave
Ste 502
White Plains, NY 10601
Phone (914) 948-1000

122 Maple Ave
Fl 9
White Plains, NY 10601
Phone (914) 849-3755

170 Maple Ave
Fl 4
White Plains, NY 10601
Phone (914) 328-8444

Networks

  • Healthfirst Medicare Network H3359
  • Healthfirst Medicare Network H9678
  • Healthfirst Medicare Network H1722
  • Healthfirst Medicare Network H5989

Interoperability endpoints

  • FHIR API: https://fhir4.healow.com/fhir/r4/IHJHBD

Organizations & group practices 3

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.

Hospital & facility affiliations 1

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1502841600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770595200000",
    "number": "1245756808",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "170 MAPLE AVE STE 502",
            "city": "WHITE PLAINS",
            "state": "NY",
            "postal_code": "106014708",
            "telephone_number": "914-948-1000",
            "fax_number": "914-949-5860"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20 PROSPECT AVE",
            "city": "HACKENSACK",
            "state": "NJ",
            "postal_code": "076011997",
            "telephone_number": "551-996-4424",
            "fax_number": "551-996-0831"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "170 Maple Ave Ste 502",
            "address_purpose": "LOCATION",
            "city": "White Plains",
            "state": "NY",
            "postal_code": "106014708",
            "country_code": "US",
            "telephone_number": "914-948-1000",
            "fax_number": "914-949-6109",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SEMMELROCK",
        "first_name": "KATHRYN",
        "middle_name": "M",
        "name_prefix": "Mrs.",
        "credential": "AGPCNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-08-16",
        "last_updated": "2026-02-09",
        "certification_date": "2026-02-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Adult Health",
            "state": "NY",
            "license": "308316",
            "primary": false
        },
        {
            "code": "363LA2200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Adult Health",
            "state": "NJ",
            "license": "26NJ01049100",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Hackensack, NJ

Sources for this page

Verify at the official NPI Registry.