Quick answers
- Which hospitals does Mark Ngo work at?
- Medicare's official clinician data lists Mark Ngo at 3 hospitals: Memorialcare Long Beach Medical Center, Providence Little Company of Mary Med Ctr Torrance and Torrance Memorial Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Ngo see patients?
- Medicare's clinician data lists 1 practice location in Los Alamitos, CA. Call before your visit to confirm the address.
- What is Mark Ngo's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Medical Oncology.
- Does Mark Ngo accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Ngo 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 Mark Ngo offer telehealth?
- Medicare's clinician data says Mark Ngo offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark Ngo?
- (562) 725-4367, as listed in official Medicare / NPI Registry data.
- What is Mark Ngo's NPI number?
- 1982623468. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Ngo works
Medicare's Facility Affiliation Data lists Mark Ngo 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
- Providence Little Company of Mary Med Ctr TorranceTorrance, CA · Acute Care Hospital · CCN 050353
- Torrance Memorial Medical CenterTorrance, CA · Acute Care Hospital · CCN 050351
Practice locations
Addresses where Mark Ngo is enrolled with Medicare (CMS data updated 2026-10-02).
- 3851 Katella Ave, Suite 125Los Alamitos, CA 90720 (562) 725‑4367
Group practices
Medicare enrollment lists Mark Ngo as a member of this group (CMS data updated 2026-10-02).
- Cancer and Blood Specialty Clinic18 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Medical Oncologyalso
Other hematologist-oncologists in Los Alamitos
Clinicians with the same Medicare primary specialty in Los Alamitos, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1982623468 |
| 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