Alex Sun, M.D
NPI 1538502331 · Diagnostic Radiology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alex Sun, M.D is a Diagnostic Radiology Physician provider in San Diego, CA (NPI 1538502331).
Provider details
- NPI number
- 1538502331
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- A133334 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
5,372 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,387 | $9 |
| Ct Scan Head Or Brain Without Contrast70450 | 404 | $40 |
| X-Ray of Chest, 2 Views71046 | 403 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 209 | $88 |
| Mri Scan of Brain Without Contrast70551 | 189 | $70 |
| X-Ray of Abdomen, 1 View74018 | 161 | $9 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23 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
Additional practice locations (5)
- 9300 Campus Point DrLa Jolla, CA 92037-1300Phone: (800) 926-8273Fax: (888) 539-8781
- 9400 Campus Point DrLa Jolla, CA 92093-3019Phone: (800) 926-8273Fax: (888) 539-8781
- 5555 Grossmont Center DrLa Mesa, CA 91942-3019Phone: (619) 740-4008
- 330 Lewis StSan Diego, CA 92103-2108Phone: (800) 926-8273Fax: (888) 539-8781
- 6655 Alvarado RdSan Diego, CA 92120-5208Phone: (800) 926-8273Fax: (888) 539-8781
Registry dates
- Enumerated
- 2013-04-10
- Last updated
- 2024-07-08
- Certified
- 2024-07-08
Frequently asked questions
- What is Alex Sun's NPI number?
- Alex Sun's National Provider Identifier (NPI) is 1538502331, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alex Sun's specialty?
- Alex Sun is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Alex Sun located?
- Alex Sun's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Alex Sun's phone number?
- The practice phone number listed in the NPPES registry for Alex Sun is (800) 926-8273.
- Does Alex Sun accept Medicare?
- Alex Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alex Sun's NPI active?
- Yes — Alex Sun's NPI (1538502331) is active in the NPPES registry as of the last update on 2024-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.