Quick answers
- Which hospitals does Peter S. Pak work at?
- Medicare's official clinician data lists Peter S. Pak at 3 hospitals: Hoag Memorial Hospital Presbyterian, Pomona Valley Hospital Medical Center and Providence Mission Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter S. Pak see patients?
- Medicare's clinician data lists 3 practice locations, including Pomona, CA, Mission Viejo, CA and Lancaster, CA. Call before your visit to confirm the address.
- What is Peter S. Pak's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Peter S. Pak accept Medicare assignment?
- Yes. Medicare's clinician data says Peter S. Pak 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 Peter S. Pak?
- (909) 469-9477, as listed in official Medicare / NPI Registry data.
- What is Peter S. Pak's NPI number?
- 1588955694. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter S. Pak works
Medicare's Facility Affiliation Data lists Peter S. Pak at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · CCN 050224
- Pomona Valley Hospital Medical CenterPomona, CA · Acute Care Hospital · CCN 050231
- Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · CCN 050567
Practice locations
Addresses where Peter S. Pak is enrolled with Medicare (CMS data updated 2026-10-02).
- 1798 N Garey AvePomona, CA 91767 (909) 469‑9477
- 27799 Medical Ctr Rd, Suite 440Mission Viejo, CA 92691 (949) 364‑1007
- 43839 15th St WLancaster, CA 93534 (661) 945‑5984
Group practices
Medicare enrollment lists Peter S. Pak as a member of these groups (CMS data updated 2026-10-02).
- High Desert Medical Corporation54 clinicians in the group
- Oc Trauma Inc8 clinicians in the group
- The Institute of Trauma and Acute Care Inc8 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Pomona
Clinicians with the same Medicare primary specialty in Pomona, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588955694 |
| 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