Alexander Phan, MD
NPI 1245816784 · Internal Medicine Physician · Colton, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Phan, MD is a Internal Medicine Physician provider in Colton, CA (NPI 1245816784).
Provider details
- NPI number
- 1245816784
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 26 |
| Metformin Hcl | 19 |
| Gabapentin | 18 |
| Tamsulosin Hcl | 16 |
| Empagliflozinbrand: Jardiance | 14 |
| Losartan Potassium | 13 |
| Fluticasone Propionate | 12 |
| Pantoprazole Sodium | 12 |
| Ibuprofen | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$815 across 9 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
Additional practice locations (1)
- 11234 Anderson St # CLoma Linda, CA 92350-1716Phone: (909) 558-1000
Registry dates
- Enumerated
- 2021-03-23
- Last updated
- 2025-01-21
- Certified
- 2025-01-21
Frequently asked questions
- What is Alexander Phan's NPI number?
- Alexander Phan's National Provider Identifier (NPI) is 1245816784, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Phan's specialty?
- Alexander Phan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Phan located?
- Alexander Phan's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1819.
- What is Alexander Phan's phone number?
- The practice phone number listed in the NPPES registry for Alexander Phan is (909) 580-1000.
- Does Alexander Phan accept Medicare?
- Alexander Phan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Phan's NPI active?
- Yes — Alexander Phan's NPI (1245816784) is active in the NPPES registry as of the last update on 2025-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.