Margaret Mary O'Connor, GNP-BC

Primary specialty

Gerontology Nurse PractitionerTaxonomy code 363LG0600X

License

95031336 Issued in CA

Practice address

6 Woodland Rd Ste 101
Saint Helena, CA 94574-9501

Phone

(707) 963-7028

Fax

(707) 963-7255

NPI assigned

Feb 14, 2007

Last updated

May 4, 2026By 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 3

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in FL, CA2 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, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Adventist Health Physicians NetworkGroup PAC ID 3274580972, 628 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Adventist Health St Helena Hospital, Saint Helena, CA, CCN 050013
• Adventist Health Clearlake Hospital, Clearlake, CA, CCN 051317
• Providence Queen of the Valley Medical Center Hospital, Napa, CA, CCN 050009

Merit-based Incentive Payment System (MIPS)

Final score

95.77 of 100Reported as apm

Quality

81.54

Promoting interoperability

100

Improvement activities

40

Merit-based Incentive Payment System (MIPS)

Final score

85.39 of 100Reported as group

Quality

74.12

Promoting interoperability

100

Improvement activities

40

Cost

77.17

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Adventist Health Physicians Network

  • Multi-Specialty Clinic/Center
  • Hanford, CA
  • NPI 1063718583
  Medicare reassignment Care Compare group NPD
• Lee Health System Inc

  • Internal Medicine Physician
  • Fort Myers, FL
  • NPI 1942058557
  Medicare reassignment NPD
• Gastroenterology Associates of Southwest Florida LLC

  • Internal Medicine Physician
  • Fort Myers, FL
  • NPI 1154304087
  Medicare reassignment
• Adventist Health Physicians Network

  • Physical Therapy Clinic/Center
  • Paradise, CA
  • NPI 1134092190
  NPD
• Adventist Health Physicians Network

  • Plastic and Reconstructive Surgery Physician
  • Saint Helena, CA
  • NPI 1285931378
  NPD
• Lee Health System Inc

  dba Lee Health Specialty Pharmacy

  • Community/Retail Pharmacy
  • Bonita Springs, FL
  • NPI 1699510925
  NPD

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

• Adventist Health Clearlake Hospital Inc.

  dba Adventist Health Clear Lake

  • Critical Access Hospital
  • Clearlake, CA
  • NPI 1124018031
  Care Compare affiliation
• St. Helena Hospital

  dba Adventist Health St. Helena

  • General Acute Care Hospital
  • Saint Helena, CA
  • NPI 1720078082
  Care Compare affiliation
• St. Joseph Health Northern California, LLC

  dba Providence Queen of the Valley Medical Center

  • General Acute Care Hospital
  • Napa, CA
  • NPI 1013080084
  Care Compare affiliation
• St. Joseph Health Northern California, LLC

  dba Providence Queen of the Valley Medical Center

  • General Acute Care Hospital
  • Napa, CA
  • NPI 1235218785
  Care Compare affiliation

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

{
    "created_epoch": "1171411200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777852800000",
    "number": "1538202452",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6 WOODLAND RD STE 101",
            "city": "SAINT HELENA",
            "state": "CA",
            "postal_code": "945749501",
            "telephone_number": "707-963-7028",
            "fax_number": "707-963-7255"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6 WOODLAND RD STE 101",
            "city": "SAINT HELENA",
            "state": "CA",
            "postal_code": "945749501",
            "telephone_number": "707-963-7028",
            "fax_number": "707-963-7255"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'CONNOR",
        "first_name": "MARGARET",
        "middle_name": "MARY",
        "credential": "GNP-BC",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-02-14",
        "last_updated": "2026-05-04",
        "certification_date": "2026-05-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Adult Health",
            "state": "FL",
            "license": "ARNP3104612",
            "primary": false
        },
        {
            "code": "363LG0600X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Gerontology",
            "state": "CA",
            "license": "95031336",
            "primary": true
        },
        {
            "code": "363LG0600X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Gerontology",
            "state": "FL",
            "license": "APRN3104612",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "P00471142",
            "state": "FL"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "308810300",
            "state": "FL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Mary Newkirk, M.D.
• Mila Nhi Nguyen, NP
• Kimberly Grace Nichelini, D.M.D.
• Bradley Benjamin Nichinson, M.D.
• Norman Wall DO Inc.
• Ole Health
• Puja P Orozco, PA-C
• Mark Clifton Ottoson, N.P.
• Pacific Radiation Oncology, Inc
• Martin T Paukert, MD

• Gerontology Nurse Practitioner in Saint Helena, CA
• Providers in Saint Helena, CA by specialty
• Gerontology Nurse Practitioner in California

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