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GILLIAN MAIRI ABIR MBCHB, FRCA
NPI 1538300595
Anesthesiology in Stanford, CA

Active since March 20, 2009PECOS Enrolled
76.5/100
CMS Quality Rating
300 PASTEUR DR # H3580, STANFORD, CA 94305(650) 723-4000(650) 721-1688 Get Directions Write a Review

NPPES record last updated: April 8, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 8, 2024, Aug 27, 2019, Feb 4, 2016 (3 updates tracked since 2016).

About Gillian Mairi Abir Mbchb, Frca NPPES

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

GILLIAN MAIRI ABIR MBCHB, FRCA (NPI 1538300595) is an individual anesthesiology provider in Stanford, California, licensed in California (A123672) and active in the NPI registry since March 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1538300595
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameGILLIAN MAIRI ABIRCredential: MBCHB, FRCA
Location Address300 PASTEUR DR # H3580Stanford, CA 94305-2200
Mailing Address300 Pasteur Dr, H3580Stanford, CA 94305-2200 · (650) 721-6133 · Fax (650) 721-1688
Phone(650) 723-4000
Fax(650) 721-1688
Sole ProprietorNo
Enumeration DateMarch 20, 2009
Last NPPES UpdateApril 8, 20243 updates tracked since enumeration
NPPES CertifiedApril 8, 2024
✔ NPI 1538300595 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A123672
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
300 PASTEUR DR # H3580, Stanford, CA 94305
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gillian Mairi Abir Mbchb, Frca 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 Gillian Abir reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Stanford Health Care
Same address
General Acute Care Hospital
300 PASTEUR DRIVE
Stanford, CA 94305
  • Reassigned Medicare billing, California enrollment
  • 4,258 clinicians in this Medicare group
NPI 1437292927 (650) 723-4000
Lpch Medical Group Div Of Lucile
0.2 mi
Children
725 WELCH RD
Palo Alto, CA 94304
  • Reassigned Medicare billing, California enrollment
  • 3,617 clinicians in this Medicare group
NPI 1417907940 (650) 498-6762

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

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.5/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality74.31
Promoting Interoperability100
Improvement Activities40
Cost43.95

Other Providers at the Same Location NPPES 6

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

DR. HEATHER CADENHEAD MD, FRCPC
Anesthesiology
300 PASTEUR DR # H3580
STANFORD, CA 94305
Santa Clara County (650) 723-6415
DR. JOHN MICHAEL DENTON
Anesthesiology
300 PASTEUR DR # H3580
STANFORD, CA 94305
Santa Clara County (650) 723-6412
GARETH LEWIS ACKLAND PHD FRCA
Anesthesiology
300 PASTEUR DR # H3580, STANFORD HOSPITAL ANESETHESIA DEPT
STANFORD, CA 94305
Santa Clara County (650) 723-6412
DR. MAGGIE JENNIFER CHOU MD
Anesthesiology
300 PASTEUR DR # H3580
STANFORD, CA 94305
Santa Clara County (650) 723-6412
KELLY THOMAS JOYCE DO
Student in an Organized Health Care Education/Training Program
300 PASTEUR DR # H3580
PALO ALTO, CA 94305
Santa Clara County (330) 419-1221
LEEANNE PARK M.D.
Anesthesiology
300 PASTEUR DR # H3580
STANFORD, CA 94305
Santa Clara County (650) 723-7377

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 Gillian Abir's NPI number?

The NPI number for Gillian Abir is 1538300595. It was assigned to this individual provider in the NPPES registry on March 20, 2009.

Where is Gillian Abir located?

Gillian Abir practices at 300 Pasteur Dr # H3580, Stanford, CA 94305. The listed phone number is (650) 723-4000.

What is Gillian Abir's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Gillian Abir enrolled in Medicare?

Yes. Gillian Abir is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gillian Abir's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gillian Abir reassigns Medicare benefits to 2 organizations: Stanford Health Care (Stanford, CA) and Lpch Medical Group Div Of Lucile (Palo Alto, 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 Gillian Abir'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 Gillian Abir was last updated on April 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.