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REBECCA M. O'BRIEN MD
NPI 1437223757
Internal Medicine in Fremont, CA

Active since November 20, 2006PECOS Enrolled
39400 PASEO PADRE PKWY, FREMONT, CA 94538(510) 795-3000 Get Directions Write a Review

NPPES record last updated: December 13, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Rebecca M. O'brien Md NPPES

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

REBECCA M. O'BRIEN MD (NPI 1437223757) is an individual internal medicine provider in Fremont, California, licensed in California (A76283) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437223757
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameREBECCA M. O'BRIENCredential: MD
Location Address39400 PASEO PADRE PKWYFremont, CA 94538-2310
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3466 · (510) 625-6262
Phone(510) 795-3000
Sole ProprietorNo
Enumeration DateNovember 20, 2006
Last NPPES UpdateDecember 13, 2021
✔ NPI 1437223757 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A76283
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
39400 PASEO PADRE PKWY, Fremont, CA 94538
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Other Identifiers 1

Medicaid00A762830CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Rebecca M. O'brien Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 94538 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
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.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MELINDA JENNY STEELE MD
Family Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 248-3000
HEUMIN LI R.PH.
Pharmacist
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 248-7577
SRILATA RAMAN M.D.
Internal Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 248-3623
MS. BARBARA TEDESCO ZEPEDA WHCNP
Registered Nurse (Women's Health Care, Ambulatory)
39400 PASEO PADRE PKWY, EMBARCADERO OB/GYN
FREMONT, CA 94538
Alameda County (510) 248-3591
CALVIN B. WHEELER MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 795-3000
HANNELORE MOHR MD
Internal Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 795-3000
FREDERICK G. HOM MD
Internal Medicine
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 795-3000
MANJU JACOB
Dietitian, Registered
39400 PASEO PADRE PKWY
FREMONT, CA 94538
Alameda County (510) 739-6412

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 Rebecca O'brien's NPI number?

The NPI number for Rebecca O'brien is 1437223757. It was assigned to this individual provider in the NPPES registry on November 20, 2006.

Where is Rebecca O'brien located?

Rebecca O'brien practices at 39400 Paseo Padre Pkwy, Fremont, CA 94538. The listed phone number is (510) 795-3000.

What is Rebecca O'brien's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Rebecca O'brien enrolled in Medicare?

Yes. Rebecca O'brien is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Rebecca O'brien was last updated on December 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.