Troy James Andreasen, M.D.
Specialist · Ontario, CA
Troy James Andreasen, M.D. is a specialist with a practice address in Ontario, California, and NPI 1851559462, issued on May 30, 2008. Check the license (California A61879, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Troy James Andreasen
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- A61879 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3333 E Concours St, Ontario, CA 91764
- Phone
- (909) 481-7500
- Enumerated
- May 30, 2008
- Record last updated
- May 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (909) 481-1857
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 3333 E Concours St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Iveliess StevensonBehavior Technician1699647040
Verify Troy James Andreasen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A61879Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average specialist in 2024
45 Medicare Part D claims for 16 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. 15 claims were for opioids.
Most prescribed
- Acetaminophen-Codeine14 claims
- Cephalexin11 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: $112.46
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. 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.
Troy James Andreasen among 5,749 specialist records in California
Troy James Andreasen, M.D. 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2008 · 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.
All 5,749 in California → Every provider in Ontario → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Hampton Gaskins, MDOntario, CA 917641265506109
- Kaming Li, MDOntario, CA 917641295993913
- Brian Machida, MDPntariio, CA 917641417012949
- 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 Troy James Andreasen, M.D.'s NPI number?
Troy James Andreasen, M.D.'s National Provider Identifier (NPI) is 1851559462, issued on May 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Troy James Andreasen, M.D. located?
The NPPES record lists a practice address at 3333 E Concours St, Ontario, CA, 91764. Phone: (909) 481-7500. Providers update this record themselves, so call before visiting.
How can I verify Troy James Andreasen, M.D.'s license?
NPPES lists California license number A61879, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Troy James Andreasen, M.D. prescribe under Medicare Part D?
In 2024, Troy James Andreasen, M.D. had 45 Medicare Part D claims for 16 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.