Jonathan Michael Claassen, MD
Anesthesiology Physician · Medford, OR
Jonathan Michael Claassen, MD is an anesthesiology physician with a practice address in Medford, Oregon, and NPI 1780799114, issued on Aug 19, 2006. Check the license (Oregon MD29027, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan Michael Claassen
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License numbers
- MD29027 OR
A87730 CA
Self-reported in NPPES; status is on the state search - Practice location
- 842 E Main St, Medford, OR 97504
- Phone
- (541) 773-7273
- Enumerated
- Aug 19, 2006
- Record last updated
- Jan 6, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (541) 773-2027
- Medicaid ID
- 00A877300 CA
- Medicare enrollment
- Enrolled (PECOS I20090528000644); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 969 in Oregon → Look up another NPI →
Also registered at 842 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Alford, MDAnesthesiology Physician1992787808
- Chase Altom, M.D.Anesthesiology Physician1699029298
- Mack Bandler, M.D.Diagnostic Radiology Physician1609830199
- Travis Behrend, M.D.Anesthesiology Physician1447516950
- Brent Bose, MDVascular & Interventional Radiology Physician1841435047
- Meghan BostAnesthesiology Physician1396998654
Verify Jonathan Michael Claassen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD29027Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 96.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Anesthesia Associates OF Medford PCMedford, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Michael Claassen among 969 anesthesiology physician records in Oregon
Jonathan Michael Claassen, MD is one of 969 anesthesiology physician records with a practice address in Oregon. 68% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 52% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2002 · median 2009 among the 627 with a school on file
- Record last updated2012 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 anesthesiology physician records list a practice address in Medford
They are 59 of the 4,542 NPPES records with a practice address in Medford, and 969 anesthesiology physician records in Oregon.
All 969 in Oregon → Every provider in Medford → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Amanda Alford, MDMedford, OR 975041992787808
- Jill Antoine, MDMedford, OR 975041912963679
- David Chandler, D.O.Medford, OR 975041023052511
- James Faraoni, MDMedford, OR 975041639109507
- Gary Fletcher, MDMedford, OR 975041407884281
- Brian Hall, MDMedford, OR 975041750318945
- Thomas Hammond, MDMedford, OR 975041962432823
- Gary Ingram, MDMedford, OR 975041578593448
Common questions
What is Jonathan Michael Claassen, MD's NPI number?
Jonathan Michael Claassen, MD's National Provider Identifier (NPI) is 1780799114, issued on Aug 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Michael Claassen, MD located?
The NPPES record lists a practice address at 842 E Main St, Medford, OR, 97504. Phone: (541) 773-7273. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Michael Claassen, MD's license?
NPPES lists Oregon license number MD29027, 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.
What is Jonathan Michael Claassen, MD's MIPS final score?
The 2023 MIPS final score is 96.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.