Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

EUGENIA PAULA CUSTO GREIG MD
NPI 1649856477
Ophthalmology in Palo Alto, CA

Active since March 22, 2021PECOS EnrolledAccepts Medicare Assignment
300 PASTEUR DR, PALO ALTO, CA 94305(650) 723-4000 Get Directions Write a Review

NPPES record last updated: July 7, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 7, 2026, Jul 7, 2025, Apr 23, 2021 and 2 more (5 updates tracked since 2021).

About Eugenia Paula Custo Greig Md NPPES

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

EUGENIA PAULA CUSTO GREIG MD (NPI 1649856477) is an individual ophthalmology provider in Palo Alto, California, licensed in California (A180994) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Yale University School Of Medicine (2021).

NPPES Registry Identity

NPI1649856477
Entity TypeIndividualFemale
Primary Taxonomy207W00000X
Provider Legal NameEUGENIA PAULA CUSTO GREIGCredential: MD
Location Address300 PASTEUR DRPalo Alto, CA 94305-2200
Mailing Address300 Pasteur DrPalo Alto, CA 94305-2200 · (650) 723-4000
Sole ProprietorNo
Medical School CMSYale University School Of MedicineGraduated 2021
Enumeration DateMarch 22, 2021
Last NPPES UpdateJuly 7, 20265 updates tracked since enumeration
NPPES CertifiedJuly 7, 2026
NPI 1649856477 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License Licensed in CA · A180994
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
300 PASTEUR DR, Palo Alto, CA 94305

Secondary Practice Locations 2

Location 139000 Bob Hope DrRancho Mirage, CA 92270-3202 · Phone (760) 340-3911 · Fax (760) 834-7874
Location 2513 Parnassus Ave # S321San Francisco, CA 94143-2205 · Phone (415) 476-1239

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

Eugenia Paula Custo Greig 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 ID5991247892
PECOS Enrollment IDI20250624001117
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 94305 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
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 20

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

Internal Medicine (Gastroenterology)
300 PASTEUR DR, ALWAY BUILD M211, MC 5187
STANFORD, CA 94305
Radiology (Vascular & Interventional Radiology)
300 PASTEUR DR
STANFORD, CA 94305
Psychiatry & Neurology (Psychiatry)
300 PASTEUR DR
STANFORD, CA 94305
Radiology (Diagnostic Radiology)
300 PASTEUR DR
STANFORD, CA 94305
Nurse Practitioner
300 PASTEUR DR
STANFORD, CA 94305
Neurological Surgery
300 PASTEUR DR
STANFORD, CA 94305
Pathology (Anatomic Pathology & Clinical Pathology)
300 PASTEUR DR, LANE 235
STANFORD, CA 94305
Internal Medicine (Critical Care Medicine)
300 PASTEUR DR
STANFORD, CA 94305

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 Eugenia Custo Greig's NPI number?

The NPI number for Eugenia Custo Greig is 1649856477. It was assigned to this individual provider in the NPPES registry on March 22, 2021.

Where is Eugenia Custo Greig located?

Eugenia Custo Greig practices at 300 Pasteur Dr, Palo Alto, CA 94305. The listed phone number is (650) 723-4000.

What is Eugenia Custo Greig's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Eugenia Custo Greig enrolled in Medicare?

Yes. Eugenia Custo Greig 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 Eugenia Custo Greig was last updated on July 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days 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.