Doctor profile · Federal record
Dr. William Tseng, M.D.
Surgical Oncology Physician (CMS: Surgical Oncology) · Surgery Physician · Arcadia, CA
- NPI 1417071242
- Accepts Medicare
- 22 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
301 W Huntington Dr Ste 400
Arcadia, CA 910073471
(626) 218-9840
fax (626) 218-9860 - Additional location
-
1500 Duarte RD
Duarte, CA 910103012
(626) 256-4673 - Additional location
-
209 Fair Oaks Ave
South Pasadena, CA 910301814
(626) 396-2900
fax (626) 799-2889 - Mailing address
-
Po Box 512185
Los Angeles, CA 900510185
Credentials & registration
- NPI registered
- March 2007 — 19 yrs on file
- Profile last updated
- June 8, 2022
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 2086X0206X — NUCC code
- State license (1)
- California #A94446
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1417071242. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
84
Distinct HCPCS
3
Medicare allowed
$13,349
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 37 | 29 | $152 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 32 | 32 | $192 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 15 | 13 | $104 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 28. This provider delivers 3.0× the peer median.Open Payments
Industry payments received
All-time total
$2,706
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | 1 | $2,590.00 | |
| Aadi Bioscience, Inc. | 1 | $116.17 |
By nature of payment
Frequently asked questions
What is Dr. William Tseng's medical specialty?
Dr. William Tseng practices Surgical Oncology Physician in Arcadia, CA.
Where does Dr. William Tseng practice?
Dr. William Tseng practices at 301 W Huntington Dr Ste 400, Arcadia, CA 910073471. Office phone: 6262189840.
What is Dr. William Tseng's NPI?
Dr. William Tseng's National Provider Identifier (NPI) is 1417071242, issued by NPPES.
Does Dr. William Tseng accept Medicare assignment?
Yes. Dr. William Tseng accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Tseng commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); New patient office or other outpatient visit (HCPCS 99205); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.