James A. Siy, MD
Internal Medicine Physician · Folsom, CA
James A. Siy, MD is an internal medicine physician with a practice address in Folsom, California, and NPI 1811075591, issued on Nov 1, 2006. Check the license (California G87559, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James A. Siy
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G87559 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2155 Iron Point RD, Folsom, CA 95630
- Phone
- (916) 817-5000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00G875590 CA
- Medicare enrollment
- Enrolled (PECOS I20060309000509); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2155 Iron Point RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James A. Siy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G87559Check 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
8,061 Medicare Part D claims for 936 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 620 claims were for opioids.
Most prescribed
- Atorvastatin Calcium413 claims
- Hydrocodone-Acetaminophen397 claims
- Amlodipine Besylate355 claims
- Lisinopril277 claims
- Levothyroxine Sodium274 claims
- Albuterol Sulfate Hfa203 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.
Bills Medicare through one group practice
- Permanente Medical Group IncFolsom, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James A. Siy among 17,696 internal medicine physician records in California
James A. Siy, 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
- Graduated1992 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
52 internal medicine physician records list a practice address in Folsom
They are 52 of the 1,811 NPPES records with a practice address in Folsom, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Folsom → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Amanda Camposagrado, M.D.Folsom, CA 956301780669945
- James ChenFolsom, CA 956301568447266
- Robert Debruin, M.D.Folsom, CA 956301073507786
- Donald Gutman, M.D.Folsom, CA 956301396776738
- Sami Khouri, MDFolsom, CA 956301295779197
- Roger Mar-Tang, M.D.Folsom, CA 956301851375307
- Soe Maw, MDFolsom, CA 956301215984364
- Don Nguyen, D.O.Folsom, CA 956301356311427
Common questions
What is James A. Siy, MD's NPI number?
James A. Siy, MD's National Provider Identifier (NPI) is 1811075591, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James A. Siy, MD located?
The NPPES record lists a practice address at 2155 Iron Point RD, Folsom, CA, 95630. Phone: (916) 817-5000. Providers update this record themselves, so call before visiting.
How can I verify James A. Siy, MD's license?
NPPES lists California license number G87559, 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 James A. Siy, MD prescribe under Medicare Part D?
In 2024, James A. Siy, MD had 8,061 Medicare Part D claims for 936 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.