Helen Sun, MD
NPI 1952966442 · Internal Medicine Physician · Daly City, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Helen Sun, MD is a Internal Medicine Physician provider in Daly City, CA (NPI 1952966442).
Provider details
- NPI number
- 1952966442
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,174 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 226 | $6 |
| Hemoglobin A1c Level83036 | 174 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 136 | $13 |
| Vitamin D-3 Level82306 | 121 | $29 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 106 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 89 | $6 |
| Blood Test, Thyroid Stimulating Hormone (tsh) |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 403 | 138 |
| Amlodipine Besylate | 341 | 107 |
| Losartan Potassium | 175 | 60 |
| Metformin Hcl | 135 | 46 |
| Metoprolol Succinate | 95 | 28 |
| Lisinopril | 65 | 19 |
| Hydrochlorothiazide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$107 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 (1)
- 1249 15th StHuntington, WV 25701-3662Phone: (304) 691-1000
Registry dates
- Enumerated
- 2019-05-09
- Last updated
- 2022-04-18
- Certified
- 2022-04-18
Frequently asked questions
- What is Helen Sun's NPI number?
- Helen Sun's National Provider Identifier (NPI) is 1952966442, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Helen Sun's specialty?
- Helen Sun is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Helen Sun located?
- Helen Sun's practice location on file with NPPES is 211 Eastmoor Ave, Daly City, CA 94015-2036.
- What is Helen Sun's phone number?
- The practice phone number listed in the NPPES registry for Helen Sun is (650) 550-3923.
- Does Helen Sun accept Medicare?
- Helen Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Helen Sun's NPI active?
- Yes — Helen Sun's NPI (1952966442) is active in the NPPES registry as of the last update on 2022-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.