Individual Healthcare Provider
Mark J Den Hartog, DC
Provider's NPPES record last updated: June 24, 2026
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1023081155
- Primary Specialty
- Chiropractor
- Practice Location
- Eugene, Oregon
- Sole Proprietor
- Yes
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 18, 2026, 12:43 AM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Chiropractor
Chiropractic Providers
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
Taxonomy code 111N00000X
Provider-Reported License Information
- Chiropractor (Oregon)
- 6485
- Chiropractor (Washington)
- 60741817
Practice Locations
Practice Location
225 E 4th Ave
Eugene, Oregon 97401-2429
Phone: (541) 762-4807
Additional Practice Location
114 1/2 E Monroe
Pleasantville, Iowa 50225-7744
Phone: (515) 848-3334
Fax: (515) 848-3355
Additional Practice Location
1018 7th Ave Se
Olympia, Washington 98501-1512
Phone: (360) 459-8114
Fax: (360) 493-8742
Additional Practice Location
114 1/2 E Monroe
Pleasantville, Iowa 50225-7744
Phone: (515) 848-3334
Fax: (515) 848-3355
Record Information
- Enumeration Date
- February 9, 2006
- Provider's NPPES Record Last Updated
- June 24, 2026
- Certification Date
- June 24, 2026
- NPISignal NPPES Dataset
- August 2026
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