Quick answers
- Which hospitals does Gillian Mackay work at?
- Medicare's official clinician data lists Gillian Mackay at 1 hospital: UC San Diego Health Hillcrest - Hillcrest Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gillian Mackay see patients?
- Medicare's clinician data lists 1 practice location in San Diego, CA. Call before your visit to confirm the address.
- What is Gillian Mackay's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Gillian Mackay accept Medicare assignment?
- Yes. Medicare's clinician data says Gillian Mackay 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 Gillian Mackay?
- (858) 249-6753, as listed in official Medicare / NPI Registry data.
- What is Gillian Mackay's NPI number?
- 1770702177. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gillian Mackay works
Medicare's Facility Affiliation Data lists Gillian Mackay at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UC San Diego Health Hillcrest - Hillcrest Medical CenterSan Diego, CA · Acute Care Hospital · CCN 050025
Practice locations
Addresses where Gillian Mackay is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 W Arbor DrSan Diego, CA 92103 (858) 249‑6753
Group practices
Medicare enrollment lists Gillian Mackay as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of California2,089 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770702177 |
| 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