Cassie A Kosarek, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

35234 Issued in NH

Practice address

3 Lebanon St Ste 39
Hanover, NH 03755-2158

Phone

(802) 526-4810

NPI assigned

Mar 26, 2021

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Opted out of Medicare

Yes, effective Jan 7, 2026 through Jan 7, 2028

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Upper Valley Psychiatry P.L.L.C.

  • Health Service Clinic/Center
  • Hanover, NH
  • NPI 1417833435
  NPD Authorized official

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

{
    "created_epoch": "1616716800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772582400000",
    "number": "1114504099",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3 LEBANON ST STE 39",
            "city": "HANOVER",
            "state": "NH",
            "postal_code": "037552196",
            "telephone_number": "802-526-4810",
            "fax_number": "603-448-0661"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3 LEBANON ST STE 39",
            "city": "HANOVER",
            "state": "NH",
            "postal_code": "037552158",
            "telephone_number": "802-526-4810"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KOSAREK",
        "first_name": "CASSIE",
        "middle_name": "A",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-03-26",
        "last_updated": "2026-03-04",
        "certification_date": "2026-03-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "VT",
            "license": "042.0018707",
            "primary": false
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "NH",
            "license": "35234",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Grace Prosperi Ketcham, PSYD
• Yusuf Ali Khan, MD
• Nancy Hayes Kilgore, D.MIN.
• Knight Pharmacy Inc
• Donald Owen Kollisch, MD
• Brianna Morgan Krafcik, MD
• Daniel Kranseler
• Ktherapy and Brainspotting With Katherine
• Ktherapy and Brainspotting With Katherine
• Sara Lamar-Sterling

• Psychiatry Physician in Hanover, NH
• Providers in Hanover, NH by specialty
• Psychiatry Physician in New Hampshire

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 4, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.