Isabel Obrien, MD, MPH
NPI 1386387488 · Hospice and Palliative Medicine (Emergency Medicine) Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabel Obrien, MD, MPH is a Hospice and Palliative Medicine (Emergency Medicine) Physician provider in San Francisco, CA (NPI 1386387488).
Provider details
- NPI number
- 1386387488
- Entity type
- Individual
- Primary specialty
- Hospice and Palliative Medicine (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-04-16
- Last updated
- 2025-06-17
- Certified
- 2025-06-17
Frequently asked questions
- What is Isabel Obrien's NPI number?
- Isabel Obrien's National Provider Identifier (NPI) is 1386387488, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabel Obrien's specialty?
- Isabel Obrien is listed in the NPPES registry with a primary specialty of Hospice and Palliative Medicine (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Isabel Obrien located?
- Isabel Obrien's practice location on file with NPPES is 521 Parnassus Ave, Box 0125, San Francisco, CA 94143.
- What is Isabel Obrien's phone number?
- The practice phone number listed in the NPPES registry for Isabel Obrien is (415) 476-4838.
- Does Isabel Obrien accept Medicare?
- Isabel Obrien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabel Obrien's NPI active?
- Yes — Isabel Obrien's NPI (1386387488) is active in the NPPES registry as of the last update on 2025-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.