Dr. Mark J Den Hartog , DC
Chiropractor • Eugene, OR
Professional Overview & Biography Verified Profile Summary
Dr. Mark Den Hartog, DC is a certified Chiropractor practicing in Eugene, OR. With approximately 34 years of clinical experience since graduating from Northwestern College Of Chiropractic in 1992, Dr. Den Hartog delivers high-quality medical care to the local community at 225 E 4TH AVE.
Dr. Den Hartog does not directly accept Medicare assignment.
Frequently performed procedures and clinical services include chiropractic manipulative treatment, 3-4 spinal regions, chiropractic manipulative treatment, 5 spinal regions. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
225 E 4th Ave
Eugene, OR 974012429
Medicare Profile & Education
Northwestern College Of Chiropractic
1992
Not Specified
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Chiropractor in Eugene, OR
Practicing in Eugene, OR (1950 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
98941
Chiropractic manipulative treatment, 3-4 spinal regions
|
88 | 19 | $75.82 | $40.15 |
|
98942
Chiropractic manipulative treatment, 5 spinal regions
|
26 | 14 | $86.00 | $52.48 |
Medical Specialties & State Licenses
CMS Verified: 2026-06-24NUCC Taxonomy Code: 111N00000X
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.
NUCC Taxonomy Code: 111N00000X
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.
Secondary Practice Locations
114 1/2 E Monroe
Pleasantville, IA 502257744
Phone: 5158483334
1018 7th Ave Se
Olympia, WA 985011512
Phone: 3604598114
114 1/2 E Monroe
Pleasantville, IA 502257744
Phone: 5158483334
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 225 E 4TH AVE, EUGENE, OR 974012429 (Tel: 5417624807)
Registered at 225 E 4TH AVE, EUGENE, OR 974012429 (Tel: 5417624807)
Chiropractor (License #6485 in OR)
NPI status registered as active in NPPES database
Registered at 1018 7TH AVE SE, OLYMPIA, WA 985011512 (Tel: 3604598114)
Registered at 1018 7TH AVE SE, OLYMPIA, WA 985011512 (Tel: 3604598114)
Recorded as MARK DEN HARTOG, DC
Chiropractor (License #60741817 in WA)
NPI status registered as active in NPPES database
Registered at 1018 7TH AVE SE, OLYMPIA, WA 985011512 (Tel: 3604598114)
Registered at 1018 7TH AVE SE, OLYMPIA, WA 985011512 (Tel: 3604598114)
Recorded as MARK DEN HARTOG, DC
Chiropractor (License #60741817 in WA)
NPI status registered as active in NPPES database
Registered at 114 1/2 E MONROE, PLEASANTVILLE, IA 502257744 (Tel: 5158483334)
Registered at 114 1/2 E MONROE, PO BOX 491, PLEASANTVILLE, IA 502257744 (Tel: 5158483334)
Recorded as MARK DEN HARTOG
Chiropractor (License #A05976 in IA)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
225 E 4th Ave
Eugene, OR 974012429
Phone: 5417624807
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.