Diana Lam, MD
NPI 1659455251 · Cardiovascular Disease Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Lam, MD is a Cardiovascular Disease Physician provider in San Francisco, CA (NPI 1659455251).
Provider details
- NPI number
- 1659455251
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G45411 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
201 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 56 | $153 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 45 | $76 |
| Exercise Or Drug-Induced Heart Stress Test With Electrocardiogram (ecg) With Supervision By Physician93016 | 32 | $24 |
| Exercise Or Drug-Induced Heart Stress Test With Electrocardiogram (ecg) With Review By Physician93018 | 32 | $15 |
| Ultrasound of Heart During Rest, Exercise And/Or Drug-Induced Stress With Report93350 | 13 | $76 |
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 |
|---|---|---|
| Metoprolol Succinate | 155 | 56 |
| Atorvastatin Calcium | 77 | 22 |
| Empagliflozinbrand: Jardiance | 75 | 16 |
| Sacubitril/Valsartanbrand: Entresto | 49 | 11 |
| Losartan Potassium | 45 | 19 |
| Amlodipine Besylate | 40 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-24
- Last updated
- 2010-02-09
Frequently asked questions
- What is Diana Lam's NPI number?
- Diana Lam's National Provider Identifier (NPI) is 1659455251, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Lam's specialty?
- Diana Lam is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Lam located?
- Diana Lam's practice location on file with NPPES is 1199 Bush Street, San Francisco, CA 94109.
- What is Diana Lam's phone number?
- The practice phone number listed in the NPPES registry for Diana Lam is (415) 664-9183.
- Does Diana Lam accept Medicare?
- Diana Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Lam's NPI active?
- Yes — Diana Lam's NPI (1659455251) is active in the NPPES registry as of the last update on 2010-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.