Tammy Nadine O'Neill, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA23196 Issued in CA

Practice address

153 Pioneer LN Ste B
Bishop, CA 93514-2517

Phone

(760) 873-2849

NPI assigned

Aug 28, 2007

Last updated

Jun 16, 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 2

Addresses

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

Physician Assistant

Education

Other, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Northern Inyo Healthcare DistrictGroup PAC ID 8921992090, 104 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northern Inyo Hospital Hospital, Bishop, CA, CCN 051324

Medicare enrollment (NPD)

Not enrolled

HHS exclusion list flag

CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.

Credentials

Physician Assistant

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.

• Northern Inyo Healthcare District

  dba Northern Inyo Hospital

  • Critical Access Hospital
  • Bishop, CA
  • NPI 1922198712
  Medicare reassignment Care Compare group NPD
• Northern Inyo Healthcare District

  dba Northern Inyo Hospital

  • Medicare Defined Swing Bed Hospital Unit
  • Bishop, CA
  • NPI 1669798815
  NPD
• Northern Inyo Healthcare District

  dba Northern Inyo Hospital Rural Health Clinic

  • Rural Health Clinic/Center
  • Bishop, CA
  • NPI 1417032921
  NPD (past)

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

• Northern Inyo Healthcare District

  dba Northern Inyo Hospital

  • Critical Access Hospital
  • Bishop, CA
  • NPI 1922198712
  Care Compare affiliation

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

{
    "created_epoch": "1188259200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781568000000",
    "number": "1548454101",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "150 PIONEER LN",
            "city": "BISHOP",
            "state": "CA",
            "postal_code": "935142556",
            "telephone_number": "760-873-5811",
            "fax_number": "760-873-2626"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "153 PIONEER LN STE B",
            "city": "BISHOP",
            "state": "CA",
            "postal_code": "935142517",
            "telephone_number": "760-873-2849"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "150 Pioneer Ln",
            "address_purpose": "LOCATION",
            "city": "Bishop",
            "state": "CA",
            "postal_code": "935142556",
            "country_code": "US",
            "telephone_number": "760-873-5811",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'NEILL",
        "first_name": "TAMMY",
        "middle_name": "NADINE",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-08-28",
        "last_updated": "2026-06-16",
        "certification_date": "2026-06-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "WA",
            "license": "PA10005256",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA23196",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Northern Inyo Healthcare District
• Northern Inyo Healthcare District (Northern Inyo Hospital Pharmacy)
• Northern Inyo Healthcare District (Northern Inyo Hospital)
• Michelle Jacqueline Noxsel, NP
• Kelly Colleen Nugent
• Victoria Jean Orlowski, DPT
• Teresa Michelle Oser
• Katrina Lynne Otten, RD
• Gabriel Overholtzer, D.D.S.
• Owens Valley Acupuncture, Inc

• Physician Assistant in Bishop, CA
• Providers in Bishop, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 16, 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.