Susan Sun, MD
NPI 1225197973 · Nephrology Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Susan Sun, MD is a Nephrology Physician provider in Riverside, CA (NPI 1225197973).
Provider details
- NPI number
- 1225197973
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A67254 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Allopurinol | 86 | 36 |
| Furosemide | 84 | 33 |
| Atorvastatin Calcium | 58 | 23 |
| Hydralazine Hcl | 52 | 21 |
| Calcitriol | 51 | 22 |
| Losartan Potassium | 44 | 19 |
| Amlodipine Besylate | 43 | 17 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$105 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
Registry dates
- Enumerated
- 2006-12-08
- Last updated
- 2021-12-08
Frequently asked questions
- What is Susan Sun's NPI number?
- Susan Sun's National Provider Identifier (NPI) is 1225197973, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Susan Sun's specialty?
- Susan Sun is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Susan Sun located?
- Susan Sun's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is Susan Sun's phone number?
- The practice phone number listed in the NPPES registry for Susan Sun is (909) 353-2000.
- Does Susan Sun accept Medicare?
- Susan Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Susan Sun's NPI active?
- Yes — Susan Sun's NPI (1225197973) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.