Michael Siu, M.D.
NPI 1528123247 · Family Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Siu, M.D. is a Family Medicine Physician provider in San Francisco, CA (NPI 1528123247).
Provider details
- NPI number
- 1528123247
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A040514 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 128 | 41 |
| Amlodipine Besylate | 96 | 30 |
| Losartan Potassium | 93 | 27 |
| Rosuvastatin Calcium | 57 | 17 |
| Metformin Hcl | 48 | 14 |
| Levothyroxine Sodium | 48 | 13 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$124 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-22
- Last updated
- 2023-03-07
Frequently asked questions
- What is Michael Siu's NPI number?
- Michael Siu's National Provider Identifier (NPI) is 1528123247, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Siu's specialty?
- Michael Siu is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Siu located?
- Michael Siu's practice location on file with NPPES is 380 W Portal Ave Ste E, San Francisco, CA 94127-1428.
- What is Michael Siu's phone number?
- The practice phone number listed in the NPPES registry for Michael Siu is (415) 753-1110.
- Does Michael Siu accept Medicare?
- Michael Siu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Siu's NPI active?
- Yes — Michael Siu's NPI (1528123247) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.