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GABRIELLE S SCHAEFER MD
NPI 1427128016
Obstetrics & Gynecology in Pleasanton, CA

Active since November 09, 2006PECOS EnrolledAccepts Medicare Assignment
5575 W LAS POSITAS BLVD STE 330, PLEASANTON, CA 94588(925) 734-3333(925) 734-9294 Get Directions Write a Review

NPPES record last updated: December 17, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gabrielle S Schaefer Md NPPES

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

GABRIELLE S SCHAEFER MD (NPI 1427128016) is an individual obstetrics & gynecology provider in Pleasanton, California, licensed in California (A87289) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1996).

NPPES Registry Identity

NPI1427128016
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameGABRIELLE S SCHAEFERCredential: MD
Location Address5575 W LAS POSITAS BLVD STE 330Pleasanton, CA 94588-5804
Mailing Address5575 W Las Positas Blvd, Suite 330Pleasanton, CA 94588-5801 · (925) 734-3333 · Fax (925) 734-9294
Phone(925) 734-3333
Fax(925) 734-9294
Sole ProprietorNo
Medical School CMSOtherGraduated 1996
Enumeration DateNovember 9, 2006
Last NPPES UpdateDecember 17, 2021
✔ NPI 1427128016 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A87289
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
5575 W LAS POSITAS BLVD STE 330, Pleasanton, CA 94588
Open in Google Maps ↗

Other Identifiers 1

Medicaid00A872890CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gabrielle S Schaefer Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9234102716
PECOS Enrollment IDI20040813000320
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 Reassignment

Medicare enrollment records show Gabrielle Schaefer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
24 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94588 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
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
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 5

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

UNIVERSITY HEALTHCARE ALLIANCE
Obstetrics & Gynecology
5575 W LAS POSITAS BLVD STE 330
PLEASANTON, CA 94588
Alameda County (925) 734-3333
REBECCA JANE STONE MD
Obstetrics & Gynecology
5575 W LAS POSITAS BLVD STE 330
PLEASANTON, CA 94588
Alameda County (925) 734-3333
CHARLENE HU MD
Psychiatry & Neurology (Neurology)
5575 W LAS POSITAS BLVD STE 330
PLEASANTON, CA 94588
Alameda County (650) 723-6469
DR. ZACHARY T. ROBERTS MD
Psychiatry & Neurology (Neurology)
5575 W LAS POSITAS BLVD STE 330
PLEASANTON, CA 94588
Alameda County (650) 723-6469
DANIELLE KRISTINA BEHARIE D.O., M.P.H.
Obstetrics & Gynecology
5575 W LAS POSITAS BLVD STE 330
PLEASANTON, CA 94588
Alameda County (925) 734-3333

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 Gabrielle Schaefer's NPI number?

The NPI number for Gabrielle Schaefer is 1427128016. It was assigned to this individual provider in the NPPES registry on November 9, 2006.

Where is Gabrielle Schaefer located?

Gabrielle Schaefer practices at 5575 W Las Positas Blvd Ste 330, Pleasanton, CA 94588. The listed phone number is (925) 734-3333.

What is Gabrielle Schaefer's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Gabrielle Schaefer enrolled in Medicare?

Yes. Gabrielle Schaefer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Gabrielle Schaefer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gabrielle Schaefer reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, CA). The 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 Gabrielle Schaefer'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 Gabrielle Schaefer was last updated on December 17, 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.