Thomas Yang Sun, MD
NPI 1215468160 · Medical Oncology Physician · Pleasanton, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Yang Sun, MD is a Medical Oncology Physician provider in Pleasanton, CA (NPI 1215468160).
Provider details
- NPI number
- 1215468160
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A157081 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 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
2,869 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 1,032 | $19 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 581 | $212 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 351 | $153 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 238 | $131 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 131 | $20 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 68 | 21 |
| Loperamide Hclbrand: Loperamide | 56 | 34 |
| Prochlorperazine Maleate | 56 | 37 |
| Prednisone | 53 | 17 |
| Abiraterone Acetate | 49 | 14 |
| Osimertinib Mesylatebrand: Tagrisso | 38 | — |
| Letrozole | 33 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$156 across 6 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
- 2017-03-22
- Last updated
- 2024-04-29
- Certified
- 2024-04-29
Frequently asked questions
- What is Thomas Yang Sun's NPI number?
- Thomas Yang Sun's National Provider Identifier (NPI) is 1215468160, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Yang Sun's specialty?
- Thomas Yang Sun is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Yang Sun located?
- Thomas Yang Sun's practice location on file with NPPES is 5725 W Las Positas Blvd Ste 100a, Pleasanton, CA 94588-4054.
- What is Thomas Yang Sun's phone number?
- The practice phone number listed in the NPPES registry for Thomas Yang Sun is (925) 734-8130.
- Does Thomas Yang Sun accept Medicare?
- Thomas Yang Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Yang Sun's NPI active?
- Yes — Thomas Yang Sun's NPI (1215468160) is active in the NPPES registry as of the last update on 2024-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.