John Fan, MD
NPI 1114129954 · Cardiovascular Disease Physician · Anaheim, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Fan, MD is a Cardiovascular Disease Physician provider in Anaheim, CA (NPI 1114129954).
Provider details
- NPI number
- 1114129954
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A96808 (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
24 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) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 13 | $71 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 11 | $8 |
Typical Medicare-allowed amounts for these services range $8–$71 (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 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 386 | 125 |
| Dabigatran Etexilate Mesylatebrand: Pradaxa | 307 | 103 |
| Losartan Potassium | 271 | 109 |
| Bisoprolol Fumarate | 264 | 103 |
| Carvedilol | 188 | 64 |
| Metoprolol Tartrate | 181 | 64 |
| Furosemide | 155 | 83 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-04
- Last updated
- 2021-12-06
Frequently asked questions
- What is John Fan's NPI number?
- John Fan's National Provider Identifier (NPI) is 1114129954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Fan's specialty?
- John Fan is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Fan located?
- John Fan's practice location on file with NPPES is 3430 E La Palma Ave, Anaheim, CA 92806-2020.
- What is John Fan's phone number?
- The practice phone number listed in the NPPES registry for John Fan is (888) 988-2800.
- Does John Fan accept Medicare?
- John Fan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Fan's NPI active?
- Yes — John Fan's NPI (1114129954) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.