Eugenia Custo Greig, MD
NPI 1649856477 · Ophthalmology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eugenia Custo Greig, MD is a Ophthalmology Physician provider in Palo Alto, CA (NPI 1649856477).
Provider details
- NPI number
- 1649856477
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A180994 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 513 Parnassus Ave # S321San Francisco, CA 94143-2205Phone: (415) 476-1239
Registry dates
- Enumerated
- 2021-03-22
- Last updated
- 2025-07-07
- Certified
- 2025-07-07
Frequently asked questions
- What is Eugenia Custo Greig's NPI number?
- Eugenia Custo Greig's National Provider Identifier (NPI) is 1649856477, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eugenia Custo Greig's specialty?
- Eugenia Custo Greig is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Eugenia Custo Greig located?
- Eugenia Custo Greig's practice location on file with NPPES is 300 Pasteur Dr, Palo Alto, CA 94305-2200.
- What is Eugenia Custo Greig's phone number?
- The practice phone number listed in the NPPES registry for Eugenia Custo Greig is (650) 723-4000.
- Does Eugenia Custo Greig accept Medicare?
- Eugenia Custo Greig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eugenia Custo Greig's NPI active?
- Yes — Eugenia Custo Greig's NPI (1649856477) is active in the NPPES registry as of the last update on 2025-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.