Ingrid Brennan, MD
NPI 1518046655 · Hospitalist Physician · San Rafael, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ingrid Brennan, MD is a Hospitalist Physician provider in San Rafael, CA (NPI 1518046655).
Provider details
- NPI number
- 1518046655
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A67040 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 43 | 22 |
| Pantoprazole Sodium | 33 | 15 |
| Torsemide | 32 | 25 |
| Tamsulosin Hcl | 31 | 17 |
| Omeprazole | 25 | 18 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 24 | 12 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2021-12-22
Frequently asked questions
- What is Ingrid Brennan's NPI number?
- Ingrid Brennan's National Provider Identifier (NPI) is 1518046655, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ingrid Brennan's specialty?
- Ingrid Brennan is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Ingrid Brennan located?
- Ingrid Brennan's practice location on file with NPPES is 99 Montecillo Rd, San Rafael, CA 94903-3308.
- What is Ingrid Brennan's phone number?
- The practice phone number listed in the NPPES registry for Ingrid Brennan is (415) 444-2000.
- Does Ingrid Brennan accept Medicare?
- Ingrid Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ingrid Brennan's NPI active?
- Yes — Ingrid Brennan's NPI (1518046655) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.