Doctor profile · Federal record

Dr. Thomas Yang Sun, MD

Medical Oncology Physician (CMS: Hematology/Oncology) · Internal Medicine Physician · Hematology (Internal Medicine) Physician · Pleasanton, CA

  • NPI 1215468160
  • Accepts Medicare
  • 9 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
5725 W Las Positas Blvd Ste 100A
Pleasanton, CA 945884054
(925) 734-8130

Credentials & registration

NPPES · NUCC
NPI registered
March 2017 — 9 yrs on file
Profile last updated
April 29, 2024
Year of graduation
2017 — 9 yrs since
Specialty taxonomy
207RX0202X — NUCC code
State license (1)
California #A157081

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1215468160. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
357
Distinct HCPCS
8
Medicare allowed
$57,058
HCPCS Description Services Patients Avg allowed
99215 Established patient office or other outpatient visit, 40-54 minutes 118 48 $210
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 61 22 $132
G2212 Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or 52 17 $36
99205 New patient office or other outpatient visit, 60-74 minutes 30 30 $255
99214 Established patient office or other outpatient visit, 30-39 minutes 27 22 $151
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 26 16 $88
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 23 23 $193
99204 New patient office or other outpatient visit, 45-59 minutes 20 20 $194

In context: peer comparison

Among 1 peers in this city , average services per provider: 44. This provider delivers 8.1× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$156
Transactions
6
Manufacturers
6
Payer (manufacturer) Industry Txns Amount
SpringWorks Therapeutics, Inc. 1 $47.17
E.R. Squibb & Sons, L.L.C. 1 $25.64
Celgene Corporation 1 $25.61
Takeda Pharmaceuticals U.S.A., Inc. 1 $20.47
Gilead Sciences, Inc. 1 $19.39
ADC Therapeutics America, Inc. 1 $17.73

By nature of payment

Food and Beverage
$156

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
101
Patients
14
Total drug cost
$15,201
Drug Type Claims Patients Total cost
Prednisone Generic 25 0 $231
Ondansetron Hcl Generic 21 14 $254
Prochlorperazine Maleate Generic 16 0 $197
Eliquis (Apixaban) Brand 15 0 $7,086
Abiraterone Acetate Generic 12 0 $7,230
Oxycodone Hcl Generic 12 0 $202

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Thomas Yang Sun's medical specialty?
Dr. Thomas Yang Sun practices Medical Oncology Physician in Pleasanton, CA.
Where does Dr. Thomas Yang Sun practice?
Dr. Thomas Yang Sun practices at 5725 W Las Positas Blvd Ste 100A, Pleasanton, CA 945884054. Office phone: 9257348130.
What is Dr. Thomas Yang Sun's NPI?
Dr. Thomas Yang Sun's National Provider Identifier (NPI) is 1215468160, issued by NPPES.
Does Dr. Thomas Yang Sun accept Medicare assignment?
Yes. Dr. Thomas Yang Sun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thomas Yang Sun commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or (HCPCS G2212). Source: CMS Medicare Physician & Other Practitioners file.