Cassandra Byrn

Primary specialty

Acute Care Nurse PractitionerTaxonomy code 363LA2100X

License

NP500226284 Issued in DC

Practice address

5255 Loughboro Rd NW
Washington, DC 20016-2633

Phone

(757) 876-9350

NPI assigned

Jul 21, 2025

Last updated

Oct 30, 2025By the provider in NPPES

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 DC, MD2 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, 2025

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Hospital & facility affiliations

• Sibley Memorial Hospital Hospital, Washington, DC, CCN 090005

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: cbyrn1388132@direct.hopkinsmedicine.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Johns Hopkins University

  dba Jhu - Neurosurgery

  • Neurological Surgery Physician
  • Bethesda, MD
  • NPI 1578569240

  DC

  Medicare reassignment NPD
• Johns Hopkins University

  dba Jhu - Anesthesia Pain MGMT

  • Pain Medicine (Anesthesiology) Physician
  • Baltimore, MD
  • NPI 1922008549
  Medicare reassignment NPD
• Johns Hopkins University

  dba Jhu - 4102 Wilson Blvd - Vision

  • Optometrist
  • Arlington, VA
  • NPI 1316750508
  NPD
• Johns Hopkins University

  dba JHU - 4692 Millennium Drive - Physician

  • Ophthalmology Physician
  • Belcamp, MD
  • NPI 1376342774
  NPD
• Johns Hopkins University

  dba Jhu - Psychiatry

  • Child & Adolescent Psychiatry Physician
  • Baltimore, MD
  • NPI 1538144803
  NPD

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

• Lucy Webb Hayes National Training School for Deaconesses & Missionarie

  dba Sibley Memorial Hospital

  • General Acute Care Hospital
  • Washington, DC
  • NPI 1366492977
  Care Compare affiliation

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

{
    "created_epoch": "1753056000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761782400000",
    "number": "1972485167",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5255 LOUGHBORO RD NW",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200162633",
            "telephone_number": "301-896-6066"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5255 LOUGHBORO RD NW",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200162633",
            "telephone_number": "757-876-9350"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BYRN",
        "first_name": "CASSANDRA",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2025-07-21",
        "last_updated": "2025-10-30",
        "certification_date": "2025-10-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2100X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Acute Care",
            "state": "DC",
            "license": "NP500226284",
            "primary": true
        },
        {
            "code": "163WP2201X",
            "taxonomy_group": "",
            "desc": "Registered Nurse, Ambulatory Care",
            "state": "CT",
            "license": "169054",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Terence Lee Byrd
• Thomas K Byrd
• Tiffany Nicole Byrd
• William Edward Byrd, MA, PSYDC
• William Henry Byrd
• Anna Louise Byrne, M.S. CCC-SLP
• Daniel Robert Byrne, MSW, LICSW
• Deirdre Mary Byrne, M.D.
• Hannah Byrne, RD
• Margaret Byrne, M.D.

• Acute Care Nurse Practitioner in Washington, DC
• Providers in Washington, DC by specialty
• Acute Care Nurse Practitioner in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 30, 2025; 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.