David Fan, M.D.
NPI 1326488040 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Fan, M.D. is a Internal Medicine Physician provider in San Diego, CA (NPI 1326488040).
Provider details
- NPI number
- 1326488040
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A140367 (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
13 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 · 88 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 284 | 101 |
| Levothyroxine Sodium | 148 | 50 |
| Rosuvastatin Calcium | 126 | 53 |
| Lisinopril | 117 | 42 |
| Pantoprazole Sodium | 116 | 47 |
| Prednisone | 111 | 82 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$68 across 1 record (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
- 2013-06-26
- Last updated
- 2021-11-09
- Certified
- 2021-11-09
Frequently asked questions
- What is David Fan's NPI number?
- David Fan's National Provider Identifier (NPI) is 1326488040, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Fan's specialty?
- David Fan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Fan located?
- David Fan's practice location on file with NPPES is 4650 Palm Ave, San Diego, CA 92154-8404.
- What is David Fan's phone number?
- The practice phone number listed in the NPPES registry for David Fan is (800) 290-5000.
- Does David Fan accept Medicare?
- David Fan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Fan's NPI active?
- Yes — David Fan's NPI (1326488040) is active in the NPPES registry as of the last update on 2021-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.