James Siy, MD
NPI 1811075591 · Internal Medicine Physician · Folsom, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Siy, MD is a Internal Medicine Physician provider in Folsom, CA (NPI 1811075591).
Provider details
- NPI number
- 1811075591
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G87559 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 134 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 413 | 142 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 397 | 53 |
| Amlodipine Besylate | 355 | 117 |
| Lisinopril | 277 | 101 |
| Levothyroxine Sodium | 274 | 95 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 203 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-13
Frequently asked questions
- What is James Siy's NPI number?
- James Siy's National Provider Identifier (NPI) is 1811075591, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Siy's specialty?
- James Siy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Siy located?
- James Siy's practice location on file with NPPES is 2155 Iron Point Rd, Folsom, CA 95630-8707.
- What is James Siy's phone number?
- The practice phone number listed in the NPPES registry for James Siy is (916) 817-5000.
- Does James Siy accept Medicare?
- James Siy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Siy's NPI active?
- Yes — James Siy's NPI (1811075591) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.