Jason T. Greyslak, DMD, MS
Dentist · Hermiston, OR
Jason T. Greyslak, DMD, MS is a dentist with a practice address in Hermiston, Oregon, and NPI 1417358961, issued on Sep 15, 2014. Check the license (Oregon D10127, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jason T. Greyslak
- Credential
- DMD, MS
- Primary taxonomy
- Dentist 122300000X
- License number
- D10127 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1050 W Elm Ave, Hermiston, OR 97838
- Phone
- (888) 468-0022
- Enumerated
- Sep 15, 2014
- Record last updated
- Jan 22, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (541) 504-3907
- Entity
- Type 1 · individual
8 nearest dentist records → All 1,246 in Oregon → Look up another NPI →
Also registered at 1050 W Elm Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brent Bakken, DDSGeneral Practice Dentistry1316094550
- G. Fulton, DDSDentist1932360807
- Joseph Gifford, M.D.Family Medicine Physician1952307183
- Matthew Hayden, DDSGeneral Practice Dentistry1174506000
- Terry McMichael, R.R.T.Radiologic Technologist1528369899
- Julian Petersen, DDSDentist1316175185
Verify Jason T. Greyslak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license D10127Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average dentist in 2024
44 Medicare Part D claims for 28 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin28 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Jason T. Greyslak among 1,246 dentist records in Oregon
Jason T. Greyslak, DMD, MS is one of 1,246 dentist records with a practice address in Oregon. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 63% of them.
- NPI issued2014 · 63% of these records are older, 33% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2015 · 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 122300000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 dentist records list a practice address in Hermiston
They are 8 of the 479 NPPES records with a practice address in Hermiston, and 1,246 dentist records in Oregon.
All 1,246 in Oregon → Every provider in Hermiston → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- G. Fulton, DDSHermiston, OR 978381932360807
- Robert Meharry, D.D.S.Hermiston, OR 978381265500177
- Kevin Murray, DMDHermiston, OR 978381659294957
- Pablo Nicacio, DDSHermiston, OR 978381740388834
- Julian Petersen, DDSHermiston, OR 978381316175185
- Cassandra Ramcharan, DMDHermiston, OR 978381902383961
- Joseph Sharon, DDSHermiston, OR 978381346537297
- Kent CherryJohn Day, OR 978451326429911
Common questions
What is Jason T. Greyslak, DMD, MS's NPI number?
Jason T. Greyslak, DMD, MS's National Provider Identifier (NPI) is 1417358961, issued on Sep 15, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Jason T. Greyslak, DMD, MS located?
The NPPES record lists a practice address at 1050 W Elm Ave, Hermiston, OR, 97838. Phone: (888) 468-0022. Providers update this record themselves, so call before visiting.
How can I verify Jason T. Greyslak, DMD, MS's license?
NPPES lists Oregon license number D10127, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Jason T. Greyslak, DMD, MS prescribe under Medicare Part D?
In 2024, Jason T. Greyslak, DMD, MS had 44 Medicare Part D claims for 28 beneficiaries; the average among dentist prescribers was 86. Part D covers Medicare prescriptions 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. 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.