Quick answers
- Does Margaret Song accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret Song accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Margaret Song see?
- In 2024, CMS data shows 161 Original Medicare patients and 593 services for Margaret Song. This counts Original Medicare only and measures volume, not quality.
- What is Margaret Song's NPI number?
- 1104074814. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Margaret Song, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 161 |
|---|---|
| Services billed to Medicare | 593 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)202 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)102 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)73 services
- Annual depression screening, 5 to 15 minutes (G0444)73 services
- Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit (G0438)15 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol74%
- High blood pressure66%
- Diabetes43%
- Arthritis30%
- Chronic kidney disease30%
- Depression20%
Practice locations
Addresses where Margaret Song is enrolled with Medicare (CMS data updated October 2, 2026).
- 6405 Day StRiverside, CA 92507 (951) 697‑5556
- 7117 Brockton AveRiverside, CA 92506 (951) 683‑6370
Group practices
Medicare enrollment lists Margaret Song as a member of this group (CMS data updated October 2, 2026).
- Riverside Medical Clinic Inc173 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Riverside
Clinicians with the same Medicare primary specialty in Riverside, CA — not a recommendation.
Other clinicians in Riverside Medical Clinic Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Medical school | Loma Linda University School Of Medicine |
|---|---|
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1104074814 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians