Quick answers
- Where does Ada W. Lien see patients?
- Medicare's clinician data lists 3 practice locations, including San Leandro, CA, Oakland, CA and Alameda, CA. Call before your visit to confirm the address.
- What is Ada W. Lien's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Ada W. Lien accept Medicare assignment?
- Yes. Medicare's clinician data says Ada W. Lien 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 Ada W. Lien?
- (510) 357-6500, as listed in official Medicare / NPI Registry data.
- What is Ada W. Lien's NPI number?
- 1174053573. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ada W. Lien is enrolled with Medicare (CMS data updated 2026-10-02).
- 13855 E 14th StSan Leandro, CA 94578 (510) 357‑6500
- 1411 E 31st StOakland, CA 94602 (510) 437‑4800
- 2070 Clinton AveAlameda, CA 94501 (510) 522‑3700
Group practices
Medicare enrollment lists Ada W. Lien as a member of this group (CMS data updated 2026-10-02).
- Alameda Health System601 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in San Leandro
Clinicians with the same Medicare primary specialty in San Leandro, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174053573 |
| 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
- 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