Wai-Lam Chan, M.D.
NPI 1891791877 · Family Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wai-Lam Chan, M.D. is a Family Medicine Physician provider in San Francisco, CA (NPI 1891791877).
Provider details
- NPI number
- 1891791877
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A74856 (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
21 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
537 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 | 167 | $154 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 110 | $156 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 104 | $24 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 62 | $110 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 46 | $18 |
| Admn Sarscov2 Vacc 1 Dose90480 | 35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 116 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 966 | 274 |
| Amlodipine Besylate | 340 | 99 |
| Rosuvastatin Calcium | 310 | 91 |
| Alendronate Sodium | 229 | 73 |
| Metformin Hcl | 228 | 65 |
| Metoprolol Succinate | 208 | 58 |
| Empagliflozin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$495 across 21 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
- 2005-06-23
- Last updated
- 2010-06-29
Frequently asked questions
- What is Wai-Lam Chan's NPI number?
- Wai-Lam Chan's National Provider Identifier (NPI) is 1891791877, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wai-Lam Chan's specialty?
- Wai-Lam Chan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Wai-Lam Chan located?
- Wai-Lam Chan's practice location on file with NPPES is 1431 Noriega St, San Francisco, CA 94122-4431.
- What is Wai-Lam Chan's phone number?
- The practice phone number listed in the NPPES registry for Wai-Lam Chan is (415) 759-3777.
- Does Wai-Lam Chan accept Medicare?
- Wai-Lam Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wai-Lam Chan's NPI active?
- Yes — Wai-Lam Chan's NPI (1891791877) is active in the NPPES registry as of the last update on 2010-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.