Brian K. Machida, MD
Specialist · Pntariio, CA
Brian K. Machida, MD is a specialist with a practice address in Pntariio, California, and NPI 1417012949, issued on Dec 26, 2006. Check the license (California 652616, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Brian K. Machida
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- 652616 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4550 Ontario Mills Pky, Pntariio, CA 91764
- Phone
- (909) 476-2600
- Enumerated
- Dec 26, 2006
- Record last updated
- Dec 28, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (909) 476-2636
- Medicaid ID
- 00G526160 CA
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Verify Brian K. Machida in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 652616Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average specialist in 2024
81 Medicare Part D claims for 18 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 16 claims were for opioids.
Most prescribed
- Cephalexin19 claims
- Ondansetron Odt19 claims
- Celecoxib16 claims
- Hydrocodone-Acetaminophen15 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: $47.55
1 payment: food and beverage; the largest payer was Baxter Healthcare. The 5,844 providers of this specialty with any payment received $4,760.79 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.
Brian K. Machida among 5,749 specialist records in California
Brian K. Machida, MD is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 60% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2016 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
The 8 specialist records with the nearest ZIP codes
- Troy Andreasen, M.D.Ontario, CA 917641851559462
- Hampton Gaskins, MDOntario, CA 917641265506109
- Kaming Li, MDOntario, CA 917641295993913
- Aadil AbowathDiamond Bar, CA 917651790238962
- Leila Jabaji, M.DDiamond Bar, CA 917651447360888
- Fortunata Mendoza, M.D.Diamond Bar, CA 917651568499317
- Joel Cipres, PHYSICAL THERAPISTPomona, CA 917661427498195
- Riza Tantoco, RDHOntario, CA 917621851098974
Common questions
What is Brian K. Machida, MD's NPI number?
Brian K. Machida, MD's National Provider Identifier (NPI) is 1417012949, issued on Dec 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Brian K. Machida, MD located?
The NPPES record lists a practice address at 4550 Ontario Mills Pky, Pntariio, CA, 91764. Phone: (909) 476-2600. Providers update this record themselves, so call before visiting.
How can I verify Brian K. Machida, MD's license?
NPPES lists California license number 652616, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Brian K. Machida, MD prescribe under Medicare Part D?
In 2024, Brian K. Machida, MD had 81 Medicare Part D claims for 18 beneficiaries; the average among specialist prescribers was 1,380. 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.