Quick answers
- Which hospitals does Mark Dy-Liacco work at?
- Medicare's official clinician data lists Mark Dy-Liacco at 2 hospitals: Antelope Valley Hospital and Garfield Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Dy-Liacco see patients?
- Medicare's clinician data lists 3 practice locations, including Lancaster, CA, Alhambra, CA and Corona, CA. Call before your visit to confirm the address.
- What is Mark Dy-Liacco's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Mark Dy-Liacco accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Dy-Liacco 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 Mark Dy-Liacco?
- (310) 400-0645, as listed in official Medicare / NPI Registry data.
- What is Mark Dy-Liacco's NPI number?
- 1366488850. 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 Dy-Liacco works
Medicare's Facility Affiliation Data lists Mark Dy-Liacco at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Antelope Valley HospitalLancaster, CA · Acute Care Hospital · CCN 050056
- Garfield Medical CenterMonterey Park, CA · Acute Care Hospital · CCN 050737
Practice locations
Addresses where Mark Dy-Liacco is enrolled with Medicare (CMS data updated 2026-10-02).
- 1206 W Ave JLancaster, CA 93534 (310) 400‑0645
- 1658 W Valley Blvd, Suite 220Alhambra, CA 91803 (310) 400‑0645
- 900 S Main St, Suite 101Corona, CA 92882 (310) 400‑0645
Group practices
Medicare enrollment lists Mark Dy-Liacco as a member of this group (CMS data updated 2026-10-02).
- House Medicine7 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Lancaster
Clinicians with the same Medicare primary specialty in Lancaster, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366488850 |
| 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