William Warren Chance, M.D.
Radiation Oncology Physician · Salem, OR
William Warren Chance, M.D. is a radiation oncology physician with a practice address in Salem, Oregon, and NPI 1164788766, issued on Apr 9, 2012. Check the license (Oregon MD 181142, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Warren Chance
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD 181142 OR
Self-reported in NPPES; status is on the state search - Practice location
- 875 Oak St SE Ste 1080, Salem, OR 97301
- Phone
- (503) 561-5294
- Enumerated
- Apr 9, 2012
- Record last updated
- Mar 7, 2023
- Fax
- (503) 814-0457
- Medicaid ID
- 500722681 OR
- Medicare enrollment
- Enrolled (PECOS I20170517002002); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2012
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 115 in Oregon → Look up another NPI →
Also registered at 875 Oak St SE Ste 1080
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shannon Lemay, PA-CPhysician Assistant1255804233
- Samuel Wang, MD, PHDRadiation Oncology Physician1851512941
Verify William Warren Chance in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD 181142Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average radiation oncology physician in 2024
85 Medicare Part D claims for 42 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Lidocaine Hcl Viscous26 claims
- Tamsulosin Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Salem HealthSalem, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Warren Chance among 115 radiation oncology physician records in Oregon
William Warren Chance, M.D. is one of 115 radiation oncology physician records with a practice address in Oregon. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 69% of them.
- NPI issued2012 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2012 · median 2006 among the 85 with a school on file
- Record last updated2023 · 50% 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 Oregon 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 Oregon
There are 115 radiation oncology physician records in Oregon.
All 115 in Oregon → Every provider in Salem → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Matthew Gordon, M.D.Salem, OR 973011730193830
- Arnella Hennig, M.D.Salem, OR 973011801800818
- Matthew Kang, M.D.Salem, OR 973011043224157
- Tasha McDonald, MDSalem, OR 973011871617126
- Nancy Reyes-Molyneux, M.D.Salem, OR 973011326062829
- Samuel Wang, MD, PHDSalem, OR 973011851512941
- Mary Austin-Seymour, M.D.Corvallis, OR 973301194816843
- Bruce Frey, M.D.Corvallis, OR 973301164431680
Common questions
What is William Warren Chance, M.D.'s NPI number?
William Warren Chance, M.D.'s National Provider Identifier (NPI) is 1164788766, issued on Apr 9, 2012. An NPI identifies a provider in billing; it is not a license.
Where is William Warren Chance, M.D. located?
The NPPES record lists a practice address at 875 Oak St SE Ste 1080, Salem, OR, 97301. Phone: (503) 561-5294. Providers update this record themselves, so call before visiting.
How can I verify William Warren Chance, M.D.'s license?
NPPES lists Oregon license number MD 181142, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Warren Chance, M.D. prescribe under Medicare Part D?
In 2024, William Warren Chance, M.D. had 85 Medicare Part D claims for 42 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.