Casey L O'Bryan, NP-C

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

RN1025479 Issued in DC

Practice address

1350 Connecticut Ave NW Ste 1250
Washington, DC 20036-1728

Phone

(888) 663-6331

Fax

(415) 252-7176

NPI assigned

Jan 25, 2012

Last updated

Mar 19, 2025By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in DC

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, 2011

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

One Medstar Primary Care LLCGroup PAC ID 0749607307, 140 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

Practice roles

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.

• One Medstar Primary Care LLC

  • Family Medicine Physician
  • Washington, DC
  • NPI 1417571530
  Medicare reassignment Care Compare group
• Frederick Health Hospital Inc

  dba Frederick Health Hospital

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)

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

{
    "created_epoch": "1327449600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1742342400000",
    "number": "1891066650",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4400 MASSACHUSETTS AVE NW",
            "address_2": "STUDENT HEALTH CENTER",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200168001",
            "telephone_number": "202-885-3380",
            "fax_number": "202-885-1222"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1350 CONNECTICUT AVE NW STE 1250",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200361728",
            "telephone_number": "888-663-6331",
            "fax_number": "415-252-7176"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4400 Massachusetts Ave NW",
            "address_2": "Student Health Center",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "DC",
            "postal_code": "200168001",
            "country_code": "US",
            "telephone_number": "202-885-3380",
            "fax_number": "202-885-1222",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'BRYAN",
        "first_name": "CASEY",
        "middle_name": "L",
        "name_prefix": "Ms.",
        "credential": "NP-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2012-01-25",
        "last_updated": "2025-03-19",
        "certification_date": "2025-03-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "DC",
            "license": "RN1025479",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Pamela S. O'Brien, LPC
• Paul O'Brien
• Sharon Reilly O'Brien
• Stephanie O'Brien, MSW, LGSW
• Timothy Joseph O'Brien
• Tyra L O'Bryant
• Colleen Serena O'Byrne, PSY.D.
• Melissa Ann O'Connell Liggett, PH.D.
• Anna Joy O'Connell, COTA/L
• Francis J O'Connell, MD

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 19, 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.