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DR. GREGORY WILLIAM ALEXANDER FRASER MBBCHB
NPI 1891674941
Anesthesiology in San Francisco, CA

Active since September 01, 2025PECOS EnrolledAccepts Medicare Assignment
521 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 514-1043 Get Directions Write a Review

NPPES record last updated: September 1, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Gregory William Alexander Fraser Mbbchb NPPES

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

DR. GREGORY WILLIAM ALEXANDER FRASER MBBCHB (NPI 1891674941) is an individual anesthesiology provider in San Francisco, California, licensed in California (SPI904) and active in the NPI registry since September 2025. He is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1891674941
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. GREGORY WILLIAM ALEXANDER FRASERCredential: MBBCHB
Location Address521 PARNASSUS AVESan Francisco, CA 94143-2206
Mailing Address1460 5th AveSan Francisco, CA 94122-3807 · (415) 793-4526
Phone(415) 514-1043
Sole ProprietorYes
Medical School CMSOtherGraduated 2016
Enumeration DateSeptember 1, 2025
NPPES CertifiedSeptember 1, 2025
✔ NPI 1891674941 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · SPI904
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.
521 PARNASSUS AVE, San Francisco, CA 94143
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gregory William Alexander Fraser Mbbchb 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 ID5991299760
PECOS Enrollment IDI20251209003392
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.

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.

KIRSTEN RITTENBACH DDS, MD
Oral & Maxillofacial Surgery
521 PARNASSUS AVE, C-522
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-8226
AMY WEINBERG MD
Hospitalist
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1000
ASHISH RAMANLAL GANDHI
Hospitalist
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-1378
LIANA VALEANU MD
Anesthesiology
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-7952
JULIN F TANG MD
Anesthesiology
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-9035
DR. BINBIN WANG M.D.
Anesthesiology
521 PARNASSUS AVE, RM C-450
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-3235
CHRISTINE V BORROMEO PHARM.D
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-1335
DR. CARLSON MATHIAS NGWABIFU ASANGHANWA
Anesthesiology
521 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-1043

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 Gregory Fraser's NPI number?

The NPI number for Gregory Fraser is 1891674941. It was assigned to this individual provider in the NPPES registry on September 1, 2025.

Where is Gregory Fraser located?

Gregory Fraser practices at 521 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 514-1043.

What is Gregory Fraser's specialty?

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

Is Gregory Fraser enrolled in Medicare?

Yes. Gregory Fraser 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.

When was this NPI record last updated?

The NPPES record for Gregory Fraser was last updated on September 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.