Doctor profile · Federal record
Dr. Peter Sien, MD
Radiation Oncology Physician (CMS: Radiation Oncology) · Radiation Oncology Physician · Radiation Oncology Physician · Kennewick, WA
- NPI 1053399568
- Accepts Medicare
- 51 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 4 locations .
- Primary practice
-
7379 W Deschutes Ave Ste 100
Kennewick, WA 993367900
(509) 987-1800
fax (509) 987-1808 - Additional location
-
625 N 6Th St
Phoenix, AZ 850042155
(602) 406-8222 - Additional location
-
1316 Nelson Ave
Modesto, CA 953505341
(209) 575-5870
fax (209) 575-5875 - Additional location
-
844 N 5Th Ave
Sequim, WA 983823045
(360) 683-9895
fax (360) 582-5614 - Mailing address
-
163 Valleyview Way
South San Francisco, CA 940805553
Show 1 more location
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- January 5, 2026
- Year of graduation
- 1975 — 51 yrs since
- Specialty taxonomy
- 2085R0001X — NUCC code
- State licenses (3)
- Washington #MD60698178 · Arizona #18502 · California #G32267
- Medicaid (4)
- CA #00G322670 · OR #500732059 · CA #CA211033 · CA #1053399568
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1053399568. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
711
Distinct HCPCS
6
Medicare allowed
$121,599
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
77014 |
Ct guidance for insertion of radiation therapy fields | 476 | 88 | $120 | |
77427 |
Radiation treatment management, 5 treatment sessions | 119 | 80 | $185 | |
77300 |
Calculation of radiation therapy dose | 49 | 17 | $61 | |
77334 |
Design and construction of complex radiation treatment device | 34 | 26 | $119 | |
77338 |
Design and construction of radiation treatment device for high precision radiation therapy | 17 | 16 | $441 | |
77301 |
High precision radiation therapy planning | 16 | 16 | $1,756 |
In context: peer comparison
Among 4 peers in Kennewick Radiation Oncology Physician, average services per provider: 161. This provider delivers 4.4× the peer median.Open Payments
Industry payments received
All-time total
$16
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Puma Biotechnology, INC. | 1 | $16.43 |
By nature of payment
Frequently asked questions
What is Dr. Peter Sien's medical specialty?
Dr. Peter Sien practices Radiation Oncology Physician in Kennewick, WA.
Where does Dr. Peter Sien practice?
Dr. Peter Sien practices at 7379 W Deschutes Ave Ste 100, Kennewick, WA 993367900. Office phone: 5099871800.
What is Dr. Peter Sien's NPI?
Dr. Peter Sien's National Provider Identifier (NPI) is 1053399568, issued by NPPES.
Does Dr. Peter Sien accept Medicare assignment?
Yes. Dr. Peter Sien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Peter Sien commonly perform?
Top Medicare-reported procedures in 2023: Ct guidance for insertion of radiation therapy fields (HCPCS 77014); Radiation treatment management, 5 treatment sessions (HCPCS 77427); Calculation of radiation therapy dose (HCPCS 77300). Source: CMS Medicare Physician & Other Practitioners file.