Marissa Laura Diorio, FNP-C CRNP

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

SP033506 Issued in PA

Practice address

100 E Lancaster Ave
Suite 330 Mob West
Wynnewood, PA 19096-3450

Phone

(610) 645-6555

Fax

(610) 649-4744

NPI assigned

Sep 19, 2025

Sex

Female

Sole proprietor

Yes

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

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, 2025

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Main Line HealthcareGroup PAC ID 1951215201, 1,154 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Main Line Health Home Care & Hospice - Home Health Home health agency, Radnor, PA, CCN 397012
• Main Line Hospital Lankenau Hospital, Wynnewood, PA, CCN 390195
• Bryn Mawr Hospital Hospital, Bryn Mawr, PA, CCN 390139

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.

• Main Line Healthcare

  • Family Medicine Physician
  • Newtown Square, PA
  • NPI 1922077643

  Multi-Specialty

  Medicare reassignment Care Compare group NPD

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

• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Wynnewood, PA
  • NPI 1245335629
  Care Compare affiliation
• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Bryn Mawr, PA
  • NPI 1508971441
  Care Compare affiliation

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

{
    "created_epoch": "1758240000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767916800000",
    "number": "1952273906",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3803 W CHESTER PIKE STE 160",
            "city": "NEWTOWN SQUARE",
            "state": "PA",
            "postal_code": "190732336",
            "telephone_number": "610-645-6555",
            "fax_number": "610-649-4744"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 E LANCASTER AVE",
            "address_2": "SUITE 330 MOB WEST",
            "city": "WYNNEWOOD",
            "state": "PA",
            "postal_code": "190963450",
            "telephone_number": "610-645-6555",
            "fax_number": "610-649-4744"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIORIO",
        "first_name": "MARISSA",
        "middle_name": "LAURA",
        "credential": "FNP-C CRNP",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2025-09-19",
        "last_updated": "2026-01-09",
        "certification_date": "2026-01-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Nurse Practitioner, Family",
            "state": "PA",
            "license": "SP033506",
            "primary": false
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Nurse Practitioner",
            "state": "PA",
            "license": "SP033506",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Anna Nicole Diantonio, PA-C
• Aaron Dickinson, DO
• Gerard John Diefes, M.D.
• Laura Dimattia, AGACNP-BC
• Victoria Dimelis, MD
• Nancy R Dipietro, D.D.S.
• Direct Draws Corporation
• Nikki Anna Doerr
• James Doherty, MD
• Bevin Lashley Dolan, MD

• Nurse Practitioner in Wynnewood, PA
• Providers in Wynnewood, PA by specialty
• Nurse Practitioner in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 9, 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.