Christopher Sun, MD
NPI 1245407105 · Internal Medicine Physician · Redondo Beach, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Sun, MD is a Internal Medicine Physician provider in Redondo Beach, CA (NPI 1245407105).
Provider details
- NPI number
- 1245407105
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A102353 (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
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,228 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 746 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 251 | $15 |
| Administration of Influenza Virus VaccineG0008 | 66 | $35 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 44 | $16 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 27 | $181 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 |
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 | 699 | 216 |
| Rosuvastatin Calcium | 489 | 157 |
| Losartan Potassium | 376 | 121 |
| Amlodipine Besylate | 248 | 88 |
| Metformin Hcl | 248 | 85 |
| Levothyroxine Sodium | 207 | 60 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$268 across 2 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
Registry dates
- Enumerated
- 2008-05-09
- Last updated
- 2021-04-20
- Certified
- 2021-04-20
Frequently asked questions
- What is Christopher Sun's NPI number?
- Christopher Sun's National Provider Identifier (NPI) is 1245407105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Sun's specialty?
- Christopher Sun is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Sun located?
- Christopher Sun's practice location on file with NPPES is 520 N Prospect Ave, Redondo Beach, CA 90277-3041.
- What is Christopher Sun's phone number?
- The practice phone number listed in the NPPES registry for Christopher Sun is (310) 376-8816.
- Does Christopher Sun accept Medicare?
- Christopher Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Sun's NPI active?
- Yes — Christopher Sun's NPI (1245407105) is active in the NPPES registry as of the last update on 2021-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.