Garrett Christopher Daum, M.D.
Psychiatry Physician · Castro Valley, CA
Garrett Christopher Daum, M.D. is a psychiatry physician with a practice address in Castro Valley, California, and NPI 1053597138, issued on Jan 18, 2008. Check the license (California G55616, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Garrett Christopher Daum
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- G55616 CA
G65616 CA
MD00040757 WA
Self-reported in NPPES; status is on the state search - Practice location
- 20980 Redwood RD, Castro Valley, CA 94546
- Phone
- (510) 390-1930
- Enumerated
- Jan 18, 2008
- Record last updated
- Jan 18, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 20980 Redwood RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jo Ellen Hilmo, PH.D.Clinical Psychologist1922025097
Verify Garrett Christopher Daum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G55616Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Garrett Christopher Daum among 8,673 psychiatry physician records in California
Garrett Christopher Daum, M.D. 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 not. Its NPI, issued in 2008, is newer than 52% of them.
- NPI issued2008 · 52% of these records are older, 43% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2008 · 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).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,673 in California → Every provider in Castro Valley → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Karen Gudiksen, M.D.Castro Valley, CA 945461053486787
- Arkady Oreper, MDCastro Valley, CA 945461346320710
- Thomas Powers, M.D.Castro Valley, CA 945461780778407
- David Ringo, MDHayward, CA 945451245318013
- A. Gerson Schreiber, MDHayward, CA 945451871645671
- Ana EwartHayward, CA 945441932745049
- Roger Lauer, M.D.Hayward, CA 945441972624534
- Ralph Rauch, MDLafayette, CA 945491073213732
Common questions
What is Garrett Christopher Daum, M.D.'s NPI number?
Garrett Christopher Daum, M.D.'s National Provider Identifier (NPI) is 1053597138, issued on Jan 18, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Garrett Christopher Daum, M.D. located?
The NPPES record lists a practice address at 20980 Redwood RD, Castro Valley, CA, 94546. Phone: (510) 390-1930. Providers update this record themselves, so call before visiting.
How can I verify Garrett Christopher Daum, M.D.'s license?
NPPES lists California license number G55616, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.