Lay-Hwa Lou, MD
NPI 1477667285 · Internal Medicine Physician · Fremont, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lay-Hwa Lou, MD is a Internal Medicine Physician provider in Fremont, CA (NPI 1477667285).
Provider details
- NPI number
- 1477667285
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A53161 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,997 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 962 | $148 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 165 | $147 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 107 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 86 | $10 |
| Hemoglobin A1c Level83036 | 86 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 86 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 80 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 805 | 240 |
| Amlodipine Besylate | 689 | 199 |
| Losartan Potassium | 566 | 169 |
| Metformin Hcl | 321 | 97 |
| Simvastatin | 195 | 57 |
| Levothyroxine Sodium | 187 | 56 |
| Glipizide | 166 | 48 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$80 across 4 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
- 2006-08-18
- Last updated
- 2010-04-15
Frequently asked questions
- What is Lay-Hwa Lou's NPI number?
- Lay-Hwa Lou's National Provider Identifier (NPI) is 1477667285, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lay-Hwa Lou's specialty?
- Lay-Hwa Lou is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lay-Hwa Lou located?
- Lay-Hwa Lou's practice location on file with NPPES is 2333 Mowry Ave, Fremont, CA 94538.
- What is Lay-Hwa Lou's phone number?
- The practice phone number listed in the NPPES registry for Lay-Hwa Lou is (510) 796-0222.
- Does Lay-Hwa Lou accept Medicare?
- Lay-Hwa Lou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lay-Hwa Lou's NPI active?
- Yes — Lay-Hwa Lou's NPI (1477667285) is active in the NPPES registry as of the last update on 2010-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.