Catherine Schuyler Brennan, MD
Psychiatry Physician · Davis, CA
Catherine Schuyler Brennan, MD is a psychiatry physician with a practice address in Davis, California, and NPI 1346354990, issued on Aug 19, 2006. Check the license (California G73257, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Schuyler Brennan
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G73257 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1590 Drew Ave Ste 200, Davis, CA 95618
- Phone
- (855) 501-1004
- Enumerated
- Aug 19, 2006
- Record last updated
- Apr 29, 2026
- Medicaid ID
- 00G732570 CA
- Medicare enrollment
- Enrolled (PECOS I20141006000410); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1590 Drew Ave Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rebecca Currie, LCSWClinical Social Worker1346729340
- Bita Shaghaghi, D.O.Psychiatry Physician1467690156
- Ajay Pal Singh, M.D.Psychiatry Physician1689830408
Verify Catherine Schuyler Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73257Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average psychiatry physician in 2024
275 Medicare Part D claims for 20 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Fluoxetine Hcl31 claims
- Lorazepam27 claims
- Clonazepam24 claims
- Quetiapine Fumarate19 claims
- Fluvoxamine Maleate13 claims
- Risperidone12 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.
Bills Medicare through one group practice
- Mark David Levine MD Professional CorporationDavis, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine Schuyler Brennan among 8,673 psychiatry physician records in California
Catherine Schuyler Brennan, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% 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, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1990 · median 2005 among the 3,295 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 psychiatry physician records list a practice address in Davis
They are 22 of the 1,711 NPPES records with a practice address in Davis, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Davis → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Elizabeth Bowler, MDDavis, CA 956181215102165
- Paul Cox, M.D.Davis, CA 956181790769834
- Ana Junia, M.D.Davis, CA 956181255580981
- Phacharawut Kanchananakhin, MDDavis, CA 956181114031721
- Seema Khan, M.D.Davis, CA 956181295842540
- Pavan Madan, M.D.Davis, CA 956181922319573
- Bita Shaghaghi, D.O.Davis, CA 956181467690156
- Ajay Pal Singh, M.D.Davis, CA 956181689830408
Common questions
What is Catherine Schuyler Brennan, MD's NPI number?
Catherine Schuyler Brennan, MD's National Provider Identifier (NPI) is 1346354990, issued on Aug 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Schuyler Brennan, MD located?
The NPPES record lists a practice address at 1590 Drew Ave Ste 200, Davis, CA, 95618. Phone: (855) 501-1004. Providers update this record themselves, so call before visiting.
How can I verify Catherine Schuyler Brennan, MD's license?
NPPES lists California license number G73257, 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 Catherine Schuyler Brennan, MD prescribe under Medicare Part D?
In 2024, Catherine Schuyler Brennan, MD had 275 Medicare Part D claims for 20 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.