Brian Macgillivray, MD
NPI 1851374623 · Family Medicine Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Macgillivray, MD is a Family Medicine Physician provider in San Antonio, TX (NPI 1851374623).
Provider details
- NPI number
- 1851374623
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- M3304 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 92 | 22 |
| Alprazolam | 66 | — |
| Montelukast Sodium | 56 | 16 |
| Progesterone, Micronizedbrand: Progesterone | 54 | 11 |
| Prednisone | 47 | 28 |
| Azithromycin | 45 | 31 |
| Zolpidem Tartrate | 42 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$30 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-25
- Last updated
- 2025-09-08
- Certified
- 2025-09-08
Frequently asked questions
- What is Brian Macgillivray's NPI number?
- Brian Macgillivray's National Provider Identifier (NPI) is 1851374623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Macgillivray's specialty?
- Brian Macgillivray is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Macgillivray located?
- Brian Macgillivray's practice location on file with NPPES is 19054 Stone Oak Pkwy Ste 102, San Antonio, TX 78258-3460.
- What is Brian Macgillivray's phone number?
- The practice phone number listed in the NPPES registry for Brian Macgillivray is (210) 447-9275.
- Does Brian Macgillivray accept Medicare?
- Brian Macgillivray is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Macgillivray's NPI active?
- Yes — Brian Macgillivray's NPI (1851374623) is active in the NPPES registry as of the last update on 2025-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.