Quick answers
- Which hospitals does Lisa Hertz work at?
- Medicare's official clinician data lists Lisa Hertz at 2 hospitals: Memorialcare Long Beach Medical Center and UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Lisa Hertz see patients?
- Medicare's clinician data lists 4 practice locations, including Orange, CA, Los Alamitos, CA and La Jolla, CA. Call before your visit to confirm the address.
- What is Lisa Hertz's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Lisa Hertz accept Medicare assignment?
- Yes. Medicare's clinician data says Lisa Hertz 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 Lisa Hertz offer telehealth?
- Medicare's clinician data says Lisa Hertz offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Lisa Hertz?
- (714) 835-7700, as listed in official Medicare / NPI Registry data.
- What is Lisa Hertz's NPI number?
- 1639237720. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Lisa Hertz works
Medicare's Facility Affiliation Data lists Lisa Hertz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Memorialcare Long Beach Medical CenterLong Beach, CA · Acute Care Hospital · CCN 050485
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where Lisa Hertz is enrolled with Medicare (CMS data updated 2026-10-02).
- 1010 W La Veta Ave, Suite 570Orange, CA 92868 (714) 835‑7700
- 3751 Katella AveLos Alamitos, CA 90720 (562) 598‑1311
- 4772 Katella Ave, Suite 200Los Alamitos, CA 90720 (562) 596‑5552
- 9850 Genesee Ave, Suite 440La Jolla, CA 92037 (858) 453‑5944
Group practices
Medicare enrollment lists Lisa Hertz as a member of these groups (CMS data updated 2026-10-02).
- Genesis Healthcare Partners PC228 clinicians in the group
- Comprehensive Gi Care a Professional Medical Group Inc3 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1984 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1639237720 |
| 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