William Michael Sullivan, DNP, FNP-C

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

R182391 Issued in MD

Practice address

6500 Baltimore National Pike
Baltimore, MD 21228-4200

Phone

(855) 910-3278

NPI assigned

Jul 25, 2023

Sex

Male

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 MD, DC2 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, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Medstar Urgent Care LLCGroup PAC ID 9335303155, shared by 36 NPIs, 300 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

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.

• Medstar Urgent Care LLC

  • Urgent Care Clinic/Center
  • Baltimore, MD
  • NPI 1902175870
  Medicare reassignment NPD
• Medstar Urgent Care, LLC

  • Urgent Care Clinic/Center
  • Wheaton, MD
  • NPI 1871843409

  DC

  Medicare reassignment NPD
• Medstar Urgent Care LLC

  • General Practice Physician
  • Lexington Park, MD
  • NPI 1275410474
  NPD
• Medstar Urgent Care LLC

  • Urgent Care Clinic/Center
  • Baltimore, MD
  • NPI 1942623319
  NPD

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

{
    "created_epoch": "1690243200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785801600000",
    "number": "1215618145",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6500 BALTIMORE NATIONAL PIKE",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212284200",
            "telephone_number": "855-910-3278"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6500 BALTIMORE NATIONAL PIKE",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212284200",
            "telephone_number": "855-910-3278"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SULLIVAN",
        "first_name": "WILLIAM",
        "middle_name": "MICHAEL",
        "credential": "DNP, FNP-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-07-25",
        "last_updated": "2026-08-04",
        "certification_date": "2026-08-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MD",
            "license": "R182391",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Meghan Elizabeth Sullivan, MS, ATC, CES, PES
• Michael David Sullivan, MD
• Miles Schaeffer Sullivan, MD
• Sarah A Sullivan, FNP
• Wendy S. Sullivan, P.A.
• Ahmed Sherif Sultan, B.D.S., P.H.D
• Daisy Mae Sultan
• Wael Sultan
• Zeynab Sultani
• Elliot Sultanik

• Family Nurse Practitioner in Baltimore, MD
• Providers in Baltimore, MD by specialty
• Family Nurse Practitioner in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 4, 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.