Christopher R. Loiselle, M.D.
Radiation Oncology Physician · Seattle, WA
Christopher R. Loiselle, M.D. is a radiation oncology physician with a practice address in Seattle, Washington, and NPI 1225259187, issued on May 1, 2007. Check the license (Washington MD60101794, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Christopher R. Loiselle
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD60101794 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1221 Madison St, Seattle, WA 98104
- Phone
- (206) 386-2323
- Enumerated
- May 1, 2007
- Record last updated
- May 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (206) 386-2393
- Medicaid ID
- 8448193 WA
- Medicare enrollment
- Enrolled (PECOS I20110908002351); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 198 in Washington → Look up another NPI →
Also registered at 1221 Madison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Dale Bloomquist, DDSOral and Maxillofacial Surgery (Dentist)1740348705
- Martha Clay, ARNPAdult Health Nurse Practitioner1073697793
Verify Christopher R. Loiselle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60101794Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average radiation oncology physician in 2024
50 Medicare Part D claims for 27 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Dexamethasone13 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.
Industry payments in 2024: $8,376.78
18 payments; by number, the most common kind was consulting fee; the largest payer was Accuray Incorporated. 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
- Tumor Institute Radiation Oncology Group LLPSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christopher R. Loiselle among 198 radiation oncology physician records in Washington
Christopher R. Loiselle, M.D. 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 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 43% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2006 · median 2006 among the 141 with a school on file
- Record last updated2021 · 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 Seattle → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Todd Barnett, M.D.Seattle, WA 981041629091483
- John Blasko, M.D.Seattle, WA 981041194748715
- Steve Eulau, M.D.Seattle, WA 981041346263183
- Tim Mate, M.D.Seattle, WA 981041699798439
- Vivek Mehta, M.D.Seattle, WA 981041417970252
- Astrid Morris, M.D.Seattle, WA 981041194739755
- Reith Sarkar, MDSeattle, WA 981041679034060
- Jacob Trotter, MDSeattle, WA 981041528528965
Common questions
What is Christopher R. Loiselle, M.D.'s NPI number?
Christopher R. Loiselle, M.D.'s National Provider Identifier (NPI) is 1225259187, issued on May 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Christopher R. Loiselle, M.D. located?
The NPPES record lists a practice address at 1221 Madison St, Seattle, WA, 98104. Phone: (206) 386-2323. Providers update this record themselves, so call before visiting.
How can I verify Christopher R. Loiselle, M.D.'s license?
NPPES lists Washington license number MD60101794, 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.
How much does Christopher R. Loiselle, M.D. prescribe under Medicare Part D?
In 2024, Christopher R. Loiselle, M.D. had 50 Medicare Part D claims for 27 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.