Erin Anne Berntsen, ACNP

Primary specialty

Acute Care Nurse PractitionerTaxonomy code 363LA2100X

License

95033845 Issued in CA

Practice address

1200 B Gale Wilson Blvd
Fairfield, CA 94533-3587

Phone

(707) 646-5031

NPI assigned

Feb 6, 2025

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

Other names 1

• Erin Anne Gilles Former name

Medicare fee-for-service enrollment

Enrolled in CA

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

University of South Alabama College of Medicine, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Northbay Physicians Surgery Center, LLCGroup PAC ID 0042122244, 336 clinicians

Inpatient Specialists of California PCGroup PAC ID 3476864448, 373 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northbay Medical Center Hospital, Fairfield, CA, CCN 050367
• Alta Bates Summit Medical Center - Alta Bates Camp Hospital, Berkeley, CA, CCN 050305

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir-myrecord.cerner.com/r4/UMZ-Uxn6V9x08sH5gCnG-5yPg9ZX7et6/

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.

• Northbay Healthcare Group

  dba dba NorthBay Medical Center

  • General Acute Care Hospital
  • Fairfield, CA
  • NPI 1821147786
  Medicare reassignment Care Compare group NPD
• Inpatient Specialists of California, PC

  • Internal Medicine Physician
  • San Bernardino, CA
  • NPI 1952792475
  Medicare reassignment Care Compare group
• Northbay Healthcare Group

  dba NorthBay VacaValley Hospital

  • Multi-Specialty Clinic/Center
  • Vacaville, CA
  • NPI 1760534713
  NPD
• Northbay Physicians Surgery Center LLC

  dba The Surgery Center

  • Ambulatory Surgical Clinic/Center
  • Vacaville, CA
  • NPI 1003015843
  NPD (past)

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

• Northbay Healthcare Group

  dba dba NorthBay Medical Center

  • General Acute Care Hospital
  • Fairfield, CA
  • NPI 1821147786
  Care Compare affiliation
• Sutter Bay Hospitals

  dba Alta Bates Summit Medical Center - Alta Bates Campus

  • General Acute Care Hospital
  • Berkeley, CA
  • NPI 1639523004
  Care Compare affiliation

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

{
    "created_epoch": "1738800000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783296000000",
    "number": "1205640489",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1501 JOSHUA TREE ST",
            "city": "DAVIS",
            "state": "CA",
            "postal_code": "956167300",
            "telephone_number": "916-513-8703"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1200 B GALE WILSON BLVD",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945333587",
            "telephone_number": "707-646-5031"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2335 Stockton Blvd",
            "address_purpose": "LOCATION",
            "city": "Sacramento",
            "state": "CA",
            "postal_code": "958172201",
            "country_code": "US",
            "telephone_number": "916-734-6500",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BERNTSEN",
        "first_name": "ERIN",
        "middle_name": "ANNE",
        "credential": "ACNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-02-06",
        "last_updated": "2026-07-06",
        "certification_date": "2026-07-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2100X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Acute Care",
            "state": "CA",
            "license": "95033845",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ERIN",
            "last_name": "GILLES",
            "middle_name": "ANNE",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Eizelle Joie Bernardo
• Janina Mae Bernas, RD
• Darrina Bernstine
• Denae Layshae Bernstine
• Donita Bernstine
• Maria Antonia Berrios
• Sandra Berrios, COUNSELOR
• Kaitlin Bessellieu
• Best Foster Care Agency
• Merry Bestard, MS, RD

• Acute Care Nurse Practitioner in Fairfield, CA
• Providers in Fairfield, CA by specialty
• Acute Care Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 6, 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.