Quick answers
- Which hospitals does John O. Lai work at?
- Medicare's official clinician data lists John O. Lai at 5 hospitals: AHMC Seton Medical Center, California Pacific Medical Center - Mission Bernal…, California Pacific Medical Center- Van Ness Campus, Peninsula Medical Center and UCSF Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John O. Lai see patients?
- Medicare's clinician data lists 1 practice location in San Francisco, CA. Call before your visit to confirm the address.
- What is John O. Lai's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John O. Lai accept Medicare assignment?
- Yes. Medicare's clinician data says John O. Lai 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.
- Does John O. Lai offer telehealth?
- Medicare's clinician data says John O. Lai offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John O. Lai?
- (415) 821-3304, as listed in official Medicare / NPI Registry data.
- What is John O. Lai's NPI number?
- 1457398406. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John O. Lai works
Medicare's Facility Affiliation Data lists John O. Lai at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AHMC Seton Medical CenterDaly City, CA · Acute Care Hospital · CCN 050289
- California Pacific Medical Center - Mission Bernal…San Francisco, CA · Acute Care Hospital · CCN 050055
- California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · CCN 050047
- Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · CCN 050007
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · CCN 050454
Practice locations
Addresses where John O. Lai is enrolled with Medicare (CMS data updated 2026-10-02).
- 1580 Valencia St, Suite 208San Francisco, CA 94110 (415) 821‑3304
Group practices
Medicare enrollment lists John O. Lai as a member of this group (CMS data updated 2026-10-02).
- John Lai and Kevin Wong Medical Corporation2 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1457398406 |
| 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