Ingrid Kristina Brennan, MD
Hospitalist Physician · San Rafael, CA
Ingrid Kristina Brennan, MD is a hospitalist physician with a practice address in San Rafael, California, and NPI 1518046655, issued on Nov 2, 2006. Check the license (California A67040, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ingrid Kristina Brennan
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A67040 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 Montecillo RD, San Rafael, CA 94903
- Phone
- (415) 444-2000
- Enumerated
- Nov 2, 2006
- Record last updated
- Dec 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A670400 CA
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 99 Montecillo RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ingrid Kristina Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A67040Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average hospitalist physician in 2024
747 Medicare Part D claims for 257 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium43 claims
- Pantoprazole Sodium33 claims
- Torsemide32 claims
- Tamsulosin Hcl31 claims
- Omeprazole25 claims
- Clopidogrel24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Ingrid Kristina Brennan among 3,099 hospitalist physician records in California
Ingrid Kristina Brennan, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in San Rafael → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Gregory Arent, MDSan Rafael, CA 949031245314210
- Anne-Maree Cantwell, MDSan Rafael, CA 949031679657670
- Siraphob Chansangavej, MDSan Rafael, CA 949031386268027
- Viet Lam, MDSan Rafael, CA 949031942384011
- Jeffrey Lovold, MDSan Rafael, CA 949031376627356
- Robert Lowell, MDSan Rafael, CA 949031053495051
- Stephen Mizroch, MDSan Rafael, CA 949031225112394
- Peter Reidy, MDSan Rafael, CA 949031013113257
Common questions
What is Ingrid Kristina Brennan, MD's NPI number?
Ingrid Kristina Brennan, MD's National Provider Identifier (NPI) is 1518046655, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ingrid Kristina Brennan, MD located?
The NPPES record lists a practice address at 99 Montecillo RD, San Rafael, CA, 94903. Phone: (415) 444-2000. Providers update this record themselves, so call before visiting.
How can I verify Ingrid Kristina Brennan, MD's license?
NPPES lists California license number A67040, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ingrid Kristina Brennan, MD prescribe under Medicare Part D?
In 2024, Ingrid Kristina Brennan, MD had 747 Medicare Part D claims for 257 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.