Michael Lam, M.D.
NPI 1033122601 · Internal Medicine Physician · Corona, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Lam, M.D. is a Internal Medicine Physician provider in Corona, CA (NPI 1033122601).
Provider details
- NPI number
- 1033122601
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A62691 (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 · 91 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 307 | 100 |
| Semaglutidebrand: Ozempic | 236 | 35 |
| Amlodipine Besylate | 231 | 76 |
| Losartan Potassium | 215 | 64 |
| Metformin Hcl | 183 | 60 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 173 | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$39 across 2 records (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
- 2006-08-14
- Last updated
- 2026-05-12
- Certified
- 2026-05-12
Frequently asked questions
- What is Michael Lam's NPI number?
- Michael Lam's National Provider Identifier (NPI) is 1033122601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Lam's specialty?
- Michael Lam is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Lam located?
- Michael Lam's practice location on file with NPPES is 720 Magnolia Ave Ste B2, Corona, CA 92879-3119.
- What is Michael Lam's phone number?
- The practice phone number listed in the NPPES registry for Michael Lam is (951) 339-8229.
- Does Michael Lam accept Medicare?
- Michael Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Lam's NPI active?
- Yes — Michael Lam's NPI (1033122601) is active in the NPPES registry as of the last update on 2026-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.