Riana Nicolaysen

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

SP030566 Issued in PA

Practice address

18646 Oxnard St
Tarzana, CA 91356-1486

Phone

(818) 996-1051

NPI assigned

Jun 20, 2024

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 PA, NY2 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

Specialty

Nurse Practitioner

Education

Other, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Ophelia Medical Group FL PAGroup PAC ID 7810398534, 103 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

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.

• Ophelia Medical Group FL, P.a.

  • Addiction Medicine (Family Medicine) Physician
  • Philadelphia, PA
  • NPI 1588244750

  NY, PA

  Medicare reassignment Care Compare group NPD
• Ophelia Medical Group, P.C.

  • Addiction Medicine (Psychiatry & Neurology) Physician
  • Philadelphia, PA
  • NPI 1376179150

  Addiction (Substance Use Disorder)

  NPD

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

{
    "created_epoch": "1718841600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772150400000",
    "number": "1952145351",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "18646 OXNARD ST",
            "city": "TARZANA",
            "state": "CA",
            "postal_code": "913561486",
            "telephone_number": "818-853-1928"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18646 OXNARD ST",
            "city": "TARZANA",
            "state": "CA",
            "postal_code": "913561486",
            "telephone_number": "818-996-1051"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "161 Cecil B Moore Ave Apt 204",
            "address_purpose": "LOCATION",
            "city": "Philadelphia",
            "state": "PA",
            "postal_code": "191223243",
            "country_code": "US",
            "telephone_number": "866-306-2026",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NICOLAYSEN",
        "first_name": "RIANA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-06-20",
        "last_updated": "2026-02-27",
        "certification_date": "2026-02-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "PA",
            "license": "SP030566",
            "primary": true
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "NY",
            "license": "359127",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Nhan Nguyen
• Ryan Nguyen, PHARMD
• Nicholas Michael Panagiotis, MD Inc
• Michael Aaron Nicholson
• Cheyanne M Nicol
• Nighat Sarwar, M.D., Inc.
• Damoun Nikouie
• Nile Valley Hospice Inc
• Ajani P Nimmagadda, M.D.
• Nina Gray, DMD, Inc.

• Nurse Practitioner in Tarzana, CA
• Providers in Tarzana, CA by specialty
• Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 27, 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.