Mary Elizabeth O'Boyle Willis, FNP

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

95014800 Issued in CA

Practice address

1250 E Marshall St
Department of Pediatrics
Richmond, VA 23298-5051

Phone

(804) 628-0189

Fax

(804) 828-6301

NPI assigned

Apr 25, 2007

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 CA, TX2 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, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Dreem Sleep Clinic PAGroup PAC ID 6608382395, 11 clinicians

Dreem Sleep Clinic of CaliforniaGroup PAC ID 1456744598, 32 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.

• Dreem Sleep Clinic of California

  • Multi-Specialty Clinic/Center
  • South San Francisco, CA
  • NPI 1750049029
  Medicare reassignment Care Compare group NPD
• Dreem Sleep Clinic, P.a.

  • Multi-Specialty Clinic/Center
  • Austin, TX
  • NPI 1437971611
  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1177459200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770940800000",
    "number": "1003035148",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 91734",
            "city": "RICHMOND",
            "state": "VA",
            "postal_code": "232911734",
            "telephone_number": "804-358-6100",
            "fax_number": "804-342-7619"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1250 E MARSHALL ST",
            "address_2": "DEPARTMENT OF PEDIATRICS",
            "city": "RICHMOND",
            "state": "VA",
            "postal_code": "232985051",
            "telephone_number": "804-628-0189",
            "fax_number": "804-828-6301"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "611 Gateway Blvd Ste 120",
            "address_purpose": "LOCATION",
            "city": "South San Francisco",
            "state": "CA",
            "postal_code": "940807066",
            "country_code": "US",
            "telephone_number": "650-761-4056",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIS",
        "first_name": "MARY ELIZABETH",
        "middle_name": "O'BOYLE",
        "name_prefix": "Mrs.",
        "credential": "FNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-04-25",
        "last_updated": "2026-02-13",
        "certification_date": "2026-02-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "VA",
            "license": "0024167014",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "CA",
            "license": "95014800",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Deanna J. Willis, MD
• Helen Agnew Willis, ACNP-BC
• James Stewart Willis III, M.S.
• John Jeffrey Willis, LCSW
• Mark C Willis Jr., MD
• Matthew Willis
• Sophie Marie Willis
• Mary Scott Willoughby, PHARMD.
• Brandon Keith Wills, DO
• Emily Wills, LPC

• Family Nurse Practitioner in Richmond, VA
• Providers in Richmond, VA by specialty
• Family Nurse Practitioner in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 13, 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.