Stan Mathioulakis, MD
Internal Medicine Physician · Duarte, CA
Stan Mathioulakis, MD is an internal medicine physician with a practice address in Duarte, California, and NPI 1912080847, issued on Oct 23, 2006. Check the license (California A85470, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stan Mathioulakis
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A85470 CA
Self-reported in NPPES; status is on the state search - Practice location
- 931 Buena Vista St, Duarte, CA 91010
- Phone
- (626) 358-3204
- Enumerated
- Oct 23, 2006
- Record last updated
- Feb 21, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (626) 358-9748
- Medicare enrollment
- Enrolled (PECOS I20040922001208); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 931 Buena Vista St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stan Mathioulakis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85470Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
8,094 Medicare Part D claims for 416 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 248 claims were for opioids.
Most prescribed
- Losartan Potassium604 claims
- Amlodipine Besylate521 claims
- Atorvastatin Calcium497 claims
- Metformin Hcl299 claims
- Omeprazole193 claims
- Hydrocodone-Acetaminophen191 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: $486.82
18 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Stan Mathioulakis among 17,696 internal medicine physician records in California
Stan Mathioulakis, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1985 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Duarte → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Karam Ashouri, MDDuarte, CA 910101518616200
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- Ulin Sargeant, M.D., MPHDuarte, CA 910101992878151
- Tyler Seto, M.D.Duarte, CA 910101669579579
- Indravadan Shah, MDDuarte, CA 910101932126497
- Koral Shah, MDDuarte, CA 910101124672613
- Mohammed Siddiqui, MDDuarte, CA 910101861056251
- Elizabeth Smalley, MDDuarte, CA 910101174596233
Common questions
What is Stan Mathioulakis, MD's NPI number?
Stan Mathioulakis, MD's National Provider Identifier (NPI) is 1912080847, issued on Oct 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stan Mathioulakis, MD located?
The NPPES record lists a practice address at 931 Buena Vista St, Duarte, CA, 91010. Phone: (626) 358-3204. Providers update this record themselves, so call before visiting.
How can I verify Stan Mathioulakis, MD's license?
NPPES lists California license number A85470, 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 Stan Mathioulakis, MD prescribe under Medicare Part D?
In 2024, Stan Mathioulakis, MD had 8,094 Medicare Part D claims for 416 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.