Peter K. Sien, MD
Radiation Oncology Physician · Kennewick, WA
Peter K. Sien, MD is a radiation oncology physician with a practice address in Kennewick, Washington, and NPI 1053399568, issued on Jan 4, 2006. Check the license (Washington MD60698178, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Peter K. Sien
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD60698178 WA
18502 AZ
G32267 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7379 W Deschutes Ave Ste 100, Kennewick, WA 99336
- Phone
- (509) 987-1800
- Enumerated
- Jan 4, 2006
- Record last updated
- Jan 5, 2026
- Fax
- (509) 987-1808
- Medicaid IDs
- 00G322670 CA
500732059 OR
CA211033 CA
1053399568 CA - Medicare enrollment
- Enrolled (PECOS I20190403003263); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1975
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 198 in Washington → Look up another NPI →
Verify Peter K. Sien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60698178Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $16.43
1 payment: food and beverage; the largest payer was Puma Biotechnology, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sjhmc Physician ServicesPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter K. Sien among 198 radiation oncology physician records in Washington
Peter K. Sien, MD is one of 198 radiation oncology physician records with a practice address in Washington. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 52% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1975 · median 2006 among the 141 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Washington
There are 198 radiation oncology physician records in Washington.
All 198 in Washington → Every provider in Kennewick → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Juno Choe, M.D., PH.D.Kennewick, WA 993361700099439
- Richard Giever, MDKennewick, WA 993361912981135
- Ryan Kraus, MDKennewick, WA 993361528509767
- Sue Mandell, MDKennewick, WA 993361578668406
- Sheila Rege, MDKennewick, WA 993361003890336
- Andrew Roehrig, MDKennewick, WA 993361225526890
- Sherry Zhao, M.D.Kennewick, WA 993361841603479
- Ian Gallaher, MDWalla Walla, WA 993621801152160
Common questions
What is Peter K. Sien, MD's NPI number?
Peter K. Sien, MD's National Provider Identifier (NPI) is 1053399568, issued on Jan 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter K. Sien, MD located?
The NPPES record lists a practice address at 7379 W Deschutes Ave Ste 100, Kennewick, WA, 99336. Phone: (509) 987-1800. Providers update this record themselves, so call before visiting.
How can I verify Peter K. Sien, MD's license?
NPPES lists Washington license number MD60698178, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.