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HILLARY BASSETT PEREIRA M.D.
NPI 1134327224
General Acute Care Hospital in San Ramon, CA

Active since July 10, 2007PECOS Enrolled
6001 NORRIS CANYON RD, SAN RAMON, CA 94583(925) 275-8280 Get Directions Write a Review

NPPES record last updated: September 8, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 8, 2022, Aug 30, 2022, Feb 11, 2022 and 1 more (4 updates tracked since 2020).

About Hillary Bassett Pereira M.d. NPPES

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

HILLARY BASSETT PEREIRA M.D. (NPI 1134327224) is an individual general acute care hospital provider in San Ramon, California and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in San Leandro.

NPPES Registry Identity

NPI1134327224
Entity TypeIndividualFemale
Primary Taxonomy282N00000X
Provider Legal NameHILLARY BASSETT PEREIRACredential: M.D.
Location Address6001 NORRIS CANYON RDSan Ramon, CA 94583-5400
Mailing Address6001 Norris Canyon RdSan Ramon, CA 94583-5400 · (925) 275-8280
Phone(925) 275-8280
Sole ProprietorYes
Enumeration DateJuly 10, 2007
Last NPPES UpdateSeptember 8, 20224 updates tracked since enumeration
NPPES CertifiedSeptember 8, 2022
✔ NPI 1134327224 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral Acute Care HospitalHospitals
Taxonomy Code282N00000X
Definition
An acute general hospital is an institution whose primary function is to provide inpatient diagnostic and therapeutic services for a variety of medical conditions, both surgical and non-surgical, to a wide population group. The hospital treats patients in an acute phase of illness or injury, characterized by a single episode or a fairly short duration, from which the patient returns to his or her normal or previous level of activity.
6001 NORRIS CANYON RD, San Ramon, CA 94583
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Other Names 1

Professional Name (2)Dr. Hilary Bassett Pereira M.d.

Secondary Practice Location 1

Location 12500 Merced StSan Leandro, CA 94577-4201 · Phone (510) 454-1000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hillary Bassett Pereira M.d. 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.

Medicare Billing Reassignments

2

Medicare enrollment records show Hillary Pereira reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Team Physicians Of Northern California Medical Group Inc
6.3 mi
Emergency Medicine
5000 HOPYARD RD, SUITE 100
Pleasanton, CA 94588
  • Reassigned Medicare billing, California enrollment
  • 202 clinicians in this Medicare group
NPI 1649692716 (925) 924-1600
Permanente Medical Group Inc
25 mi
Internal Medicine
1190 VETERANS BLVD
Redwood City, CA 94063
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1639252604 (650) 299-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
23 services22 patients

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.

EMMA WINFIELD N.P
Nurse Practitioner (Family)
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-9200
DR. JASON WYETH KOOB M.D.
Emergency Medicine
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-9200
ANAHITA RASHIDION SHAHABI
Internal Medicine
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-9200
DR. TIMOTHY D. UNGERER D.O.
Anesthesiology
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-9200
ALLIANCE HEALTHCARE SERVICES INC.
Clinic/Center (Radiology)
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-0634
DR. SHIRIN ZAVOSHI MD
Internal Medicine
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-9200
SAN RAMON OCCUPATIONAL MEDICINE MEDICAL GROUP,INC.
Preventive Medicine (Occupational Medicine)
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (209) 580-1573
EDSIL ASIS DE OCAMPO MD
Internal Medicine
6001 NORRIS CANYON RD
SAN RAMON, CA 94583
Contra Costa County (925) 275-9200

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 Hillary Pereira's NPI number?

The NPI number for Hillary Pereira is 1134327224. It was assigned to this individual provider in the NPPES registry on July 10, 2007. The provider is also known as Dr. Hilary Bassett Pereira M.D..

Where is Hillary Pereira located?

Hillary Pereira practices at 6001 Norris Canyon Rd, San Ramon, CA 94583. The listed phone number is (925) 275-8280.

What is Hillary Pereira's specialty?

The primary specialty registered for this NPI is General Acute Care Hospital with taxonomy code 282N00000X.

Is Hillary Pereira enrolled in Medicare?

Yes. Hillary Pereira is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Hillary Pereira's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hillary Pereira reassigns Medicare benefits to 2 organizations: Team Physicians Of Northern California Medical Group Inc (Pleasanton, CA) and Permanente Medical Group Inc (Redwood City, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Hillary Pereira's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Hillary Pereira was last updated on September 8, 2022. 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.