Sophie Sun, MD, PHD
NPI 1144726829 · Internal Medicine Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sophie Sun, MD, PHD is a Internal Medicine Physician provider in Loma Linda, CA (NPI 1144726829).
Provider details
- NPI number
- 1144726829
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- A163986 (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
8 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
335 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 272 | $118 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 63 | $115 |
Typical Medicare-allowed amounts for these services range $115–$118 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-04-02
- Last updated
- 2022-08-18
- Certified
- 2022-08-18
Frequently asked questions
- What is Sophie Sun's NPI number?
- Sophie Sun's National Provider Identifier (NPI) is 1144726829, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sophie Sun's specialty?
- Sophie Sun is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sophie Sun located?
- Sophie Sun's practice location on file with NPPES is 11234 Anderson St, Loma Linda, CA 92354.
- What is Sophie Sun's phone number?
- The practice phone number listed in the NPPES registry for Sophie Sun is (877) 558-6248.
- Does Sophie Sun accept Medicare?
- Sophie Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sophie Sun's NPI active?
- Yes — Sophie Sun's NPI (1144726829) is active in the NPPES registry as of the last update on 2022-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.