Mark J. Den Hartog, DC
Chiropractor · Eugene, OR
Mark J. Den Hartog, DC is a chiropractor with a practice address in Eugene, Oregon, and NPI 1023081155, issued on Feb 9, 2006. Check the license (Oregon 6485, as entered in NPPES) with the Oregon board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark J. Den Hartog
- Credential
- DC
- Primary taxonomy
- Chiropractor 111N00000X
- License numbers
- 6485 OR
60741817 WA
Self-reported in NPPES; status is on the state search - Practice location
- 225 E 4TH Ave, Eugene, OR 97401
- Phone
- (541) 762-4807
- Enumerated
- Feb 9, 2006
- Record last updated
- Jun 24, 2026
- Medicare enrollment
- Enrolled (PECOS I20251209004243); may accept Medicare assignment
- Medical or professional school
- Northwestern College Of Chiropractic, 1992
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 1,881 in Oregon → Look up another NPI →
Verify Mark J. Den Hartog in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license 6485Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark J. Den Hartog among 1,881 chiropractor records in Oregon
Mark J. Den Hartog, DC is one of 1,881 chiropractor records with a practice address in Oregon. 18% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 74% newer
- In a Medicare fileNo · 18% of these records are
- In the CMS Doctors and Clinicians fileYes · 34% of these records are
- Graduated1992 · median 2008 among the 638 with a school on file
- Record last updated2026 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Chiropractor providers in Oregon
There are 1,881 chiropractor records in Oregon. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,881 in Oregon → Every provider in Eugene → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Shawn Arbor, D.C.Eugene, OR 974011104909043
- Nancy Colfer, D.C.Eugene, OR 974011285696617
- Wade Guthrie, D.C., P.C.Eugene, OR 974011669484077
- Eric Hansen, DCEugene, OR 974011215089495
- Katherine Kinports, D.C.Eugene, OR 974011891808788
- Charles Koch, DCEugene, OR 974011134293442
- Frank Muhr, D.C.Eugene, OR 974011285625913
- Bradley Rethwill, D.C.Eugene, OR 974011548242183
Common questions
What is Mark J. Den Hartog, DC's NPI number?
Mark J. Den Hartog, DC's National Provider Identifier (NPI) is 1023081155, issued on Feb 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark J. Den Hartog, DC located?
The NPPES record lists a practice address at 225 E 4TH Ave, Eugene, OR, 97401. Phone: (541) 762-4807. Providers update this record themselves, so call before visiting.
How can I verify Mark J. Den Hartog, DC's license?
NPPES lists Oregon license number 6485, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity 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. 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.