Rachel Rose Devadhason Nguyen, MD
Psychiatry Physician · San Marcos, CA
Rachel Rose Devadhason Nguyen, MD is a psychiatry physician with a practice address in San Marcos, California, and NPI 1932542750, issued on Apr 10, 2013. Check the license (California A134079, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rachel Rose Devadhason Nguyen
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A134079 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Rancheros Dr Ste 130, San Marcos, CA 92069
- Phone
- (858) 279-1223
- Enumerated
- Apr 10, 2013
- Record last updated
- Jul 21, 2022
- Medicare enrollment
- Enrolled (PECOS I20170817003875); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 300 Rancheros Dr Ste 130
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Melanie Dawson, LMFTMarriage & Family Therapist1538538582
- Rachel Dezember, LCSWClinical Social Worker1649370826
Verify Rachel Rose Devadhason Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A134079Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average psychiatry physician in 2024
2,987 Medicare Part D claims for 418 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Quetiapine Fumarate243 claims
- Trazodone Hcl230 claims
- Sertraline Hcl217 claims
- Duloxetine Hcl154 claims
- Alprazolam147 claims
- Clonazepam143 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
- Southern California Permanente Medical GroupSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rachel Rose Devadhason Nguyen among 8,673 psychiatry physician records in California
Rachel Rose Devadhason Nguyen, 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 2013, is newer than 69% of them.
- NPI issued2013 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2013 · median 2005 among the 3,295 with a school on file
- Record last updated2022 · 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.
All 8,673 in California → Every provider in San Marcos → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Robert Alessi, M.D.San Marcos, CA 920691770685901
- Alan Berkowitz, MDSan Marcos, CA 920691578519476
- Claudio Cabrejos, MDSan Marcos, CA 920691033133483
- Sheila Cai, MDSan Marcos, CA 920691780625012
- Victor Doroski, MDSan Marcos, CA 920691851330351
- Nicole Esposito, MDSan Marcos, CA 920691497880579
- Nicholas Frost, MDSan Marcos, CA 920691730129651
- Josefa Licas, M.D.San Marcos, CA 920691083650535
Common questions
What is Rachel Rose Devadhason Nguyen, MD's NPI number?
Rachel Rose Devadhason Nguyen, MD's National Provider Identifier (NPI) is 1932542750, issued on Apr 10, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Rachel Rose Devadhason Nguyen, MD located?
The NPPES record lists a practice address at 300 Rancheros Dr Ste 130, San Marcos, CA, 92069. Phone: (858) 279-1223. Providers update this record themselves, so call before visiting.
How can I verify Rachel Rose Devadhason Nguyen, MD's license?
NPPES lists California license number A134079, 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 Rachel Rose Devadhason Nguyen, MD prescribe under Medicare Part D?
In 2024, Rachel Rose Devadhason Nguyen, MD had 2,987 Medicare Part D claims for 418 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.