Alan Leung, MD
NPI 1245222330 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Leung, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1245222330).
Provider details
- NPI number
- 1245222330
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 12846R (LA)
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
20 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
31 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 31 | $108 |
Typical Medicare-allowed amounts for these services range $108–$108 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 807 | 261 |
| Amlodipine Besylate | 607 | 192 |
| Losartan Potassium | 422 | 138 |
| Lisinopril | 308 | 102 |
| Metformin Hcl | 239 | 76 |
| Tamsulosin Hcl | 222 | 90 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-16
- Last updated
- 2021-12-09
Frequently asked questions
- What is Alan Leung's NPI number?
- Alan Leung's National Provider Identifier (NPI) is 1245222330, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Leung's specialty?
- Alan Leung is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Leung located?
- Alan Leung's practice location on file with NPPES is 2238 Geary Blvd, San Francisco, CA 94115-3416.
- What is Alan Leung's phone number?
- The practice phone number listed in the NPPES registry for Alan Leung is (415) 833-2200.
- Does Alan Leung accept Medicare?
- Alan Leung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Leung's NPI active?
- Yes — Alan Leung's NPI (1245222330) is active in the NPPES registry as of the last update on 2021-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.