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ISABEL S OBRIEN MD, MPH
NPI 1386387488
Emergency Medicine - Hospice and Palliative Medicine in San Francisco, CA

Active since April 16, 2022PECOS Enrolled
521 PARNASSUS AVE, BOX 0125, SAN FRANCISCO, CA 94143(415) 476-4838 Get Directions Write a Review

NPPES record last updated: June 17, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 17, 2025, Apr 16, 2022 (2 updates tracked since 2022).

About Isabel S Obrien Md, Mph NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ISABEL S OBRIEN MD, MPH (NPI 1386387488) is an individual hospice and palliative medicine provider in San Francisco, California, licensed in California (A202699) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (2022).

NPPES Registry Identity

NPI1386387488
Entity TypeIndividualFemale
Primary Taxonomy207PH0002X
Provider Legal NameISABEL S OBRIENCredential: MD, MPH
Location Address521 PARNASSUS AVE, BOX 0125San Francisco, CA 94143
Mailing Address521 Parnassus Ave, Box 0125San Francisco, CA 94143
Phone(415) 476-4838
Sole ProprietorNo
Medical School CMSTufts University School Of MedicineGraduated 2022
Enumeration DateApril 16, 2022
Last NPPES UpdateJune 17, 20252 updates tracked since enumeration
NPPES CertifiedJune 17, 2025
✔ NPI 1386387488 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyEmergency Medicine · Hospice and Palliative MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207PH0002X
License✔ Licensed in CA · A202699
Definition
An emergency medicine physician with special knowledge and skills to prevent and relieve the suffering experienced by patients with life-limiting illnesses. This specialist works with an interdisciplinary hospice or palliative care team to maximize quality of life while addressing physical, psychological, social and spiritual needs of both patient and family throughout the course of the disease, through the dying process, and beyond for the family. This specialist has expertise in the assessment of patients with advanced disease; the relief of distressing symptoms; the coordination of interdisciplinary patient and family-centered care in diverse venues; the use of specialized care systems including hospice; the management of the imminently dying patient; and legal and ethical decision making in end-of-life care.
Also ListedEmergency MedicineTaxonomy 207P00000X · License 72964 (TN)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
521 PARNASSUS AVE, BOX 0125, San Francisco, CA 94143
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Isabel S Obrien Md, Mph is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2769869866
PECOS Enrollment IDI20260115002100
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Isabel Obrien's NPI number?

The NPI number for Isabel Obrien is 1386387488. It was assigned to this individual provider in the NPPES registry on April 16, 2022.

Where is Isabel Obrien located?

Isabel Obrien practices at 521 Parnassus Ave, Box 0125, San Francisco, CA 94143. The listed phone number is (415) 476-4838.

What is Isabel Obrien's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Hospice and Palliative Medicine, with taxonomy code 207PH0002X.

Is Isabel Obrien enrolled in Medicare?

Yes. Isabel Obrien is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Isabel Obrien was last updated on June 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.