Josias Guillermo De Trinidad Castro, M.D.
Internal Medicine Physician · Parlier, CA
Josias Guillermo De Trinidad Castro, M.D. is an internal medicine physician with a practice address in Parlier, California, and NPI 1861831646, issued on Jun 14, 2013. Check the license (California C174719, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Josias Guillermo De Trinidad Castro
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C174719 CA
R0703 TX
Self-reported in NPPES; status is on the state search - Practice location
- 155 S Newmark Ave, Parlier, CA 93648
- Phone
- (559) 646-1200
- Enumerated
- Jun 14, 2013
- Record last updated
- Feb 1, 2022
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 155 S Newmark Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carlos Bayardo, MDFamily Medicine Physician1558347393
- Michelle Rubio, MSN, FNP-CFamily Nurse Practitioner1427690437
Verify Josias Guillermo De Trinidad Castro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C174719Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average internal medicine physician in 2024
4,249 Medicare Part D claims for 208 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 25 claims were for opioids.
Most prescribed
- Atorvastatin Calcium333 claims
- Amlodipine Besylate188 claims
- Losartan Potassium149 claims
- Metformin Hcl137 claims
- Gabapentin136 claims
- Tamsulosin Hcl125 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.
Josias Guillermo De Trinidad Castro among 17,696 internal medicine physician records in California
Josias Guillermo De Trinidad Castro, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 internal medicine physician record lists a practice address in Parlier
They are 1 of the 96 NPPES records with a practice address in Parlier, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Parlier → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Florence Leung, MDOakhurst, CA 936441396817110
- Rex Nzeribe, M.D.Oakhurst, CA 936441053322503
- Cecilia Galindo, MDReedley, CA 936541467410522
- Umme Haani Malwi, MBBSReedley, CA 936541952964520
- Jasdave Maan, MDMendota, CA 936401942829791
- Raman Mattu, M.D.Mendota, CA 936401609210830
Common questions
What is Josias Guillermo De Trinidad Castro, M.D.'s NPI number?
Josias Guillermo De Trinidad Castro, M.D.'s National Provider Identifier (NPI) is 1861831646, issued on Jun 14, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Josias Guillermo De Trinidad Castro, M.D. located?
The NPPES record lists a practice address at 155 S Newmark Ave, Parlier, CA, 93648. Phone: (559) 646-1200. Providers update this record themselves, so call before visiting.
How can I verify Josias Guillermo De Trinidad Castro, M.D.'s license?
NPPES lists California license number C174719, 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 Josias Guillermo De Trinidad Castro, M.D. prescribe under Medicare Part D?
In 2024, Josias Guillermo De Trinidad Castro, M.D. had 4,249 Medicare Part D claims for 208 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.