Robert Day, NP
NPI 1063865996 · Nurse Practitioner · Stanford, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Day, NP is a Nurse Practitioner provider in Stanford, CA (NPI 1063865996).
Provider details
- NPI number
- 1063865996
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- No
- License
- 95023125 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2016-07-15
- Last updated
- 2025-02-11
- Certified
- 2025-02-11
Frequently asked questions
- What is Robert Day's NPI number?
- Robert Day's National Provider Identifier (NPI) is 1063865996, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Day's specialty?
- Robert Day is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Robert Day located?
- Robert Day's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Robert Day's phone number?
- The practice phone number listed in the NPPES registry for Robert Day is (650) 723-4000.
- Does Robert Day accept Medicare?
- Robert Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Day's NPI active?
- Yes — Robert Day's NPI (1063865996) is active in the NPPES registry as of the last update on 2025-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.