Quick answers
- Which hospitals does Cornelia A. Tjandra work at?
- Medicare's official clinician data lists Cornelia A. Tjandra at 1 hospital: Highland Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Cornelia A. Tjandra see patients?
- Medicare's clinician data lists 1 practice location in Hayward, CA. Call before your visit to confirm the address.
- What is Cornelia A. Tjandra's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Cornelia A. Tjandra accept Medicare assignment?
- Yes. Medicare's clinician data says Cornelia A. Tjandra 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 Cornelia A. Tjandra?
- (510) 266-1700, as listed in official Medicare / NPI Registry data.
- What is Cornelia A. Tjandra's NPI number?
- 1841466406. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Cornelia A. Tjandra works
Medicare's Facility Affiliation Data lists Cornelia A. Tjandra at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Highland HospitalOakland, CA · Acute Care Hospital · CCN 050320
Practice locations
Addresses where Cornelia A. Tjandra is enrolled with Medicare (CMS data updated 2026-10-02).
- 664 Southland MallHayward, CA 94545 (510) 266‑1700
Group practices
Medicare enrollment lists Cornelia A. Tjandra as a member of this group (CMS data updated 2026-10-02).
- Alameda Health System601 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Hayward
Clinicians with the same Medicare primary specialty in Hayward, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841466406 |
| 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