Fausto J Castillo Mairena, M.D.
Family Medicine Physician · Visalia, CA
Fausto J Castillo Mairena, M.D. is a family medicine physician with a practice address in Visalia, California, and NPI 1780115972, issued on Mar 21, 2017. Check the license (California A163451, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Fausto J Castillo Mairena
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A163451 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5405 W Hillsdale Ave, Visalia, CA 93291
- Phone
- (559) 556-5591
- Enumerated
- Mar 21, 2017
- Record last updated
- Apr 26, 2024
- Fax
- (888) 720-1716
- Medicare enrollment
- Enrolled (PECOS I20201217001850); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 5405 W Hillsdale Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Harpreet Dhillon, FNP-CFamily Nurse Practitioner1528953122
- Michael Flaherty, DPMPodiatrist1962439158
- Thalia Rivera, FNP-CFamily Nurse Practitioner1235911132
Verify Fausto J Castillo Mairena in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A163451Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average family medicine physician in 2024
3,707 Medicare Part D claims for 287 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 141 claims were for opioids.
Most prescribed
- Atorvastatin Calcium197 claims
- Lisinopril121 claims
- Amlodipine Besylate118 claims
- Metformin Hcl106 claims
- Losartan Potassium104 claims
- Metoprolol Succinate104 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.
Industry payments in 2024: $75.90
3 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Fausto J Castillo Mairena among 17,133 family medicine physician records in California
Fausto J Castillo Mairena, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 79% of them.
- NPI issued2017 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2001 · median 2005 among the 10,652 with a school on file
- Record last updated2024 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 family medicine physician records list a practice address in Visalia
They are 74 of the 4,225 NPPES records with a practice address in Visalia, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Visalia → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Robert Allen, M.D.Visalia, CA 932911629074489
- John Booker, M.D.Visalia, CA 932911790769768
- Peter Caballes, MDVisalia, CA 932911275591521
- John Coffey, MDVisalia, CA 932911003826728
- Glenda Dalby, M.D.Visalia, CA 932911912903972
- Carlos Dominguez, M.D.Visalia, CA 932911548266505
- Ash Ghaly, M.D.Visalia, CA 932911619081528
- Laurie Hagopian-Dresser, DOVisalia, CA 932911578513610
Common questions
What is Fausto J Castillo Mairena, M.D.'s NPI number?
Fausto J Castillo Mairena, M.D.'s National Provider Identifier (NPI) is 1780115972, issued on Mar 21, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Fausto J Castillo Mairena, M.D. located?
The NPPES record lists a practice address at 5405 W Hillsdale Ave, Visalia, CA, 93291. Phone: (559) 556-5591. Providers update this record themselves, so call before visiting.
How can I verify Fausto J Castillo Mairena, M.D.'s license?
NPPES lists California license number A163451, 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 Fausto J Castillo Mairena, M.D. prescribe under Medicare Part D?
In 2024, Fausto J Castillo Mairena, M.D. had 3,707 Medicare Part D claims for 287 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.