Kenneth I. Marshack, M.D.
General Practice Dentistry · Portland, OR
Kenneth I. Marshack, M.D. is a general practice dentistry with a practice address in Portland, Oregon, and NPI 1568562528, issued on Sep 22, 2006. Check the license (Oregon 5268, 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
- Kenneth I. Marshack
- Credential
- M.D.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 5268 OR
Self-reported in NPPES; status is on the state search - Practice location
- 6600 NE Sandy Blvd, Portland, OR 97213
- Phone
- (503) 284-4723
- Enumerated
- Sep 22, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (503) 284-5827
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 1,888 in Oregon → Look up another NPI →
Also registered at 6600 NE Sandy Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jon Daby, DDSGeneral Practice Dentistry1801996806
Verify Kenneth I. Marshack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license 5268Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Kenneth I. Marshack among 1,888 general practice dentistry records in Oregon
Kenneth I. Marshack, M.D. is one of 1,888 general practice dentistry records with a practice address in Oregon. 60% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 55% newer
- In a Medicare fileNo · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2022 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Dentistry providers in Oregon
There are 1,888 general practice dentistry records in Oregon. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,888 in Oregon → Every provider in Portland → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- George Brant, D.M.D.Portland, OR 972131457343659
- May Chang, DDS, PCPortland, OR 972131275530610
- Jon Daby, DDSPortland, OR 972131801996806
- Patricia Demasi, DDSPortland, OR 972131437278801
- Mark Eilers, D.M.D.Portland, OR 972131811983190
- Lawrence Gagnon, DMDPortland, OR 972131568461994
- Michael Gerhards, DDSPortland, OR 972131881716462
- John Holland, DDSPortland, OR 972131417969171
Common questions
What is Kenneth I. Marshack, M.D.'s NPI number?
Kenneth I. Marshack, M.D.'s National Provider Identifier (NPI) is 1568562528, issued on Sep 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth I. Marshack, M.D. located?
The NPPES record lists a practice address at 6600 NE Sandy Blvd, Portland, OR, 97213. Phone: (503) 284-4723. Providers update this record themselves, so call before visiting.
How can I verify Kenneth I. Marshack, M.D.'s license?
NPPES lists Oregon license number 5268, 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.