Gillian Mackay, M.D.
NPI 1770702177 · Obstetrics & Gynecology Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gillian Mackay, M.D. is a Obstetrics & Gynecology Physician provider in La Jolla, CA (NPI 1770702177).
Provider details
- NPI number
- 1770702177
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A113346 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
7 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
13 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 13 | $119 |
Typical Medicare-allowed amounts for these services range $119–$119 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (6)
- 1200 Garden View RdEncinitas, CA 92024-2477Phone: (800) 926-8273Fax: (888) 539-8781
- 9300 Campus Point DrLa Jolla, CA 92037-1300Phone: (800) 926-8273Fax: (888) 539-8781
- 16950 Via TazonSan Diego, CA 92127-1607Phone: (800) 926-8273Fax: (888) 539-8781
- 6030 Village Way Ste 200San Diego, CA 92130-2973Phone: (800) 926-8273Fax: (888) 539-8781
- 3750 Convoy St Ste 312San Diego, CA 92111-3741Phone: (800) 926-8273Fax: (888) 539-8781
- 4168 Front StSan Diego, CA 92103-2030Phone: (800) 926-8273Fax: (888) 539-8781
Registry dates
- Enumerated
- 2007-04-24
- Last updated
- 2025-11-13
- Certified
- 2025-11-13
Frequently asked questions
- What is Gillian Mackay's NPI number?
- Gillian Mackay's National Provider Identifier (NPI) is 1770702177, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gillian Mackay's specialty?
- Gillian Mackay is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Gillian Mackay located?
- Gillian Mackay's practice location on file with NPPES is 8910 Villa La Jolla Dr, La Jolla, CA 92037-1701.
- What is Gillian Mackay's phone number?
- The practice phone number listed in the NPPES registry for Gillian Mackay is (800) 926-8273.
- Does Gillian Mackay accept Medicare?
- Gillian Mackay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gillian Mackay's NPI active?
- Yes — Gillian Mackay's NPI (1770702177) is active in the NPPES registry as of the last update on 2025-11-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.