Physician Profile
Peter K Sien, MD
Unclaimed ProfileAbout Dr. Sien
Peter K Sien, MD practices radiation oncology in Kennewick, WA. Peter is a 1975 graduate of Medical College of Wisconsin. According to Medicare claims data, Peter cared for 35 Medicare patients across 60 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (509) 987-1800
- Email not available
Practice Locations
7379 W DESCHUTES AVE STE 100
Kennewick, WA 99336
Conditions Commonly Evaluated or Treated
Within Radiation Oncology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Procedures & services
Most searched procedures
Procedures Most Often Billed to Medicare
60 services · 35 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Ct guidance for insertion of radiation therapy fields | Imaging | 77014 |
37 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
23 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other radiation oncology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other radiation oncology specialists in Kennewick 6
Same specialty, same city.
More connections — 21 related providers in 3 groups
Trained at Medical College of Wisconsin 8
Other providers in the same specialty who trained at the same institution.
Class of 1975 at Medical College of Wisconsin 8
Providers who graduated from the same medical school in the same year.
Also performs Ct guidance for insertion of radiation therapy fields 5
Providers in WA who bill this service to Medicare most often.
Common questions
What does Dr. Sien specialize in?
Dr. Sien is a radiation oncology in Kennewick, WA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “RADIATION ONCOLOGY”.
NPI registry
Where is Dr. Sien located?
Dr. Sien is listed at 7379 W DESCHUTES AVE STE 100, Kennewick, WA 99336. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Sien's phone number?
The number on file is (509) 987-1800. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Sien's NPI number?
Dr. Sien's National Provider Identifier is 1053399568. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Sien go to medical school?
Dr. Sien attended Medical College of Wisconsin, graduating in 1975. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Sien been practicing?
Dr. Sien has 51 years experience. Calculated from a graduation year of 1975, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Sien do most often?
According to Medicare billing data, Dr. Sien performs imaging including ct guidance for insertion of radiation therapy fields, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Sien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Sien. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.