Quick answers
- Which hospitals does Eric J. Day work at?
- Medicare's official clinician data lists Eric J. Day at 2 hospitals: Dominican Hospital and Stanford Health Care. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Eric J. Day see patients?
- Medicare's clinician data lists 1 practice location in Santa Cruz, CA. Call before your visit to confirm the address.
- What is Eric J. Day's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Eric J. Day accept Medicare assignment?
- Yes. Medicare's clinician data says Eric J. Day accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Eric J. Day?
- (831) 475-1111, as listed in official Medicare / NPI Registry data.
- What is Eric J. Day's NPI number?
- 1316443534. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Eric J. Day works
Medicare's Facility Affiliation Data lists Eric J. Day at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Dominican HospitalSanta Cruz, CA · Acute Care Hospital · CCN 050242
- Stanford Health CareStanford, CA · Acute Care Hospital · CCN 050441
Practice locations
Addresses where Eric J. Day is enrolled with Medicare (CMS data updated 2026-10-02).
- 1595 Soquel Dr, Suite 400Santa Cruz, CA 95065 (831) 475‑1111
Group practices
Medicare enrollment lists Eric J. Day as a member of this group (CMS data updated 2026-10-02).
- Dignity Health Medical Foundation1,184 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Santa Cruz
Clinicians with the same Medicare primary specialty in Santa Cruz, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Vermont College Of Medicine |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316443534 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians