Quick answers
- Which hospitals does Ernest Mak work at?
- Medicare's official clinician data lists Ernest Mak at 1 hospital: Mercy Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ernest Mak see patients?
- Medicare's clinician data lists 2 practice locations, including Merced, CA and Bakersfield, CA. Call before your visit to confirm the address.
- What is Ernest Mak's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Ernest Mak accept Medicare assignment?
- Yes. Medicare's clinician data says Ernest Mak 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 Ernest Mak?
- (800) 967-2289, as listed in official Medicare / NPI Registry data.
- What is Ernest Mak's NPI number?
- 1750489589. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ernest Mak works
Medicare's Facility Affiliation Data lists Ernest Mak at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Medical CenterMerced, CA · Acute Care Hospital · CCN 050444
Practice locations
Addresses where Ernest Mak is enrolled with Medicare (CMS data updated 2026-10-02).
- 333 Mercy AveMerced, CA 95340 (800) 967‑2289
- 400 Old River RdBakersfield, CA 93311 (864) 908‑3530
Group practices
Medicare enrollment lists Ernest Mak as a member of this group (CMS data updated 2026-10-02).
- Obhg California PC94 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Merced
Clinicians with the same Medicare primary specialty in Merced, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Francisco School Of Medicine |
| Graduation year | 1972 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750489589 |
| 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