Isabel S Obrien, MD, MPH

Primary specialty

Hospice and Palliative Medicine (Emergency Medicine) PhysicianTaxonomy code 207PH0002X

License

A202699 Issued in CA

Practice address

521 Parnassus Ave, Box 0125
San Francisco, CA 94143

Phone

(415) 476-4838

NPI assigned

Apr 16, 2022

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

Medicare fee-for-service enrollment

Enrolled in TN, CA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Emergency Medicine

Education

Tufts University School of Medicine, 2022

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/14272/brand/70/csg/1/fhir/r4

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.

• Desert Group Services, PC

  • Hospitalist Physician
  • Joshua Tree, CA
  • NPI 1891240602
  Medicare reassignment NPD
• Tennessee River Physicians, PLLC

  • Emergency Medicine Physician
  • Chattanooga, TN
  • NPI 1396282463
  Medicare reassignment
• Desert Group Services, PC

  • Geriatric Medicine (Internal Medicine) Physician
  • Joshua Tree, CA
  • NPI 1932760337
  NPD

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

{
    "created_epoch": "1650067200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750118400000",
    "number": "1386387488",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "521 PARNASSUS AVE, BOX 0125",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94143"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "521 PARNASSUS AVE, BOX 0125",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94143",
            "telephone_number": "415-476-4838"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OBRIEN",
        "first_name": "ISABEL",
        "middle_name": "S",
        "credential": "MD, MPH",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2022-04-16",
        "last_updated": "2025-06-17",
        "certification_date": "2025-06-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207PH0002X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Hospice and Palliative Medicine",
            "state": "CA",
            "license": "A202699",
            "primary": true
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "TN",
            "license": "72964",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Alisa Grace Oberschelp, M.D.
• Osita Obi-Osuagwu, MD
• Adaeze Uzodimma Obinelo, MD
• Marilyn C Oblanca
• Natalia Alejandra Obregon, DDS
• Lynn Obrien, NP
• Noel Stephen Obrien, DPM
• Richard Obryant
• Obstetric & Gynecologic Associates of San Francisco a Prof Corp
• Yelena Obukhova

• Hospice and Palliative Medicine (Emergency Medicine) Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Hospice and Palliative Medicine (Emergency Medicine) Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 17, 2025; 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.