Mario Javier Castellanos, DDS
Dentist · Fontana, CA
Mario Javier Castellanos, DDS is a dentist with a practice address in Fontana, California, and NPI 1285927962, issued on May 27, 2011. Check the license (California 60364, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mario Javier Castellanos
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 60364 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9725 Sierra Ave, Fontana, CA 92335
- Phone
- (909) 822-6200
- Enumerated
- May 27, 2011
- Record last updated
- May 27, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (909) 822-6222
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 9725 Sierra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marco Castellanos, DDSDentist1396083465
Verify Mario Javier Castellanos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 60364Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average dentist in 2024
45 Medicare Part D claims for 24 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin19 claims
- Ibuprofen18 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.
Mario Javier Castellanos among 14,729 dentist records in California
Mario Javier Castellanos, DDS is one of 14,729 dentist records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 54% of them.
- NPI issued2011 · 54% of these records are older, 43% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2011 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
49 dentist records list a practice address in Fontana
They are 49 of the 3,012 NPPES records with a practice address in Fontana, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Fontana → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Alexandra Ayoub, DDSFontana, CA 923351467672279
- James Blalock, DDSFontana, CA 923351619197563
- Francisco Correa, DDSFontana, CA 923351578759866
- Charles Flowers, DDSFontana, CA 923351295956365
- Suneetha Garlapati, DDSFontana, CA 923351225156664
- Elmer Hilo, DDSFontana, CA 923351871631358
- Laura Jimenez, D.D.SFontana, CA 923351821247826
- Sarmukh Kang, DDSFontana, CA 923351598831471
Common questions
What is Mario Javier Castellanos, DDS's NPI number?
Mario Javier Castellanos, DDS's National Provider Identifier (NPI) is 1285927962, issued on May 27, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mario Javier Castellanos, DDS located?
The NPPES record lists a practice address at 9725 Sierra Ave, Fontana, CA, 92335. Phone: (909) 822-6200. Providers update this record themselves, so call before visiting.
How can I verify Mario Javier Castellanos, DDS's license?
NPPES lists California license number 60364, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mario Javier Castellanos, DDS prescribe under Medicare Part D?
In 2024, Mario Javier Castellanos, DDS had 45 Medicare Part D claims for 24 beneficiaries; the average among dentist prescribers was 86. 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.