Janelle Lynn Tychnowitz, RN, CPN, PNP

Primary specialty

Pediatric Nurse PractitionerTaxonomy code 363LP0200X

License

F382571-1 Issued in NY

Practice address

PO Box 1559
Stony Brook, NY 11790-0989

Phone

(631) 444-0650

NPI assigned

Sep 3, 2009

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

Enrolled in NY

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

Specialty

Nurse Practitioner

Education

Other, 2003

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner, Registered Nurse

State licenses

Practice roles

Locations

Networks

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

Interoperability endpoints

• Direct secure messaging: janelle.tychnowitz.1@29151.direct.athenahealth.com

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.

• Stony Brook Children'S Service, University Faculty Practice Corporatio

  • Pediatrics Physician
  • Stony Brook, NY
  • NPI 1083660575
  Medicare reassignment NPD
• Allied Physicians Group, PLLC

  • Pediatrics Physician
  • Melville, NY
  • NPI 1396944799
  NPD (past)

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

{
    "created_epoch": "1251936000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772496000000",
    "number": "1184857336",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 1559",
            "city": "STONY BROOK",
            "state": "NY",
            "postal_code": "117900989",
            "telephone_number": "631-444-0650"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "PO BOX 1559",
            "city": "STONY BROOK",
            "state": "NY",
            "postal_code": "117900989",
            "telephone_number": "631-444-0650"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TYCHNOWITZ",
        "first_name": "JANELLE",
        "middle_name": "LYNN",
        "name_prefix": "Ms.",
        "credential": "RN, CPN, PNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2009-09-03",
        "last_updated": "2026-03-03",
        "certification_date": "2026-03-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "NY",
            "license": "F382571-1",
            "primary": true
        },
        {
            "code": "163WP0200X",
            "taxonomy_group": "",
            "desc": "Registered Nurse, Pediatrics",
            "state": "NY",
            "license": "544842-1",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Melissa Tuomi, PSY.D.
• Ethan E Turin, COTA
• Elliot Turkiew, MD
• Karis Tutuska
• Aura Olinda Tuzinowski, RPH
• Chinenye Ugonabo
• Kazi Imran Ullah, MD
• Charles A Ullo
• Nicolas Alejandro Ulloa, MD
• Leslie Anne Caparas Umali, PA

• Pediatric Nurse Practitioner in Stony Brook, NY
• Providers in Stony Brook, NY by specialty
• Pediatric Nurse Practitioner in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 3, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.