Edward Guy Groenhout, M.D.
Internal Medicine Physician · Grants Pass, OR
Edward Guy Groenhout, M.D. is an internal medicine physician with a practice address in Grants Pass, Oregon, and NPI 1760487557, issued on Jun 17, 2005. Check the license (Oregon MD24207, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Edward Guy Groenhout
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD24207 OR
Self-reported in NPPES; status is on the state search - Practice location
- 495 SW Ramsey Ave, Grants Pass, OR 97527
- Phone
- (541) 476-6644
- Enumerated
- Jun 17, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (541) 472-5673
- Medicaid ID
- 226862 OR
- Medicare enrollment
- Enrolled (PECOS I20201119000269); accepts Medicare assignment
- Medical or professional school
- University Of New Mexico School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 495 SW Ramsey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Brandes, MDInternal Medicine Physician1992700991
- Allie BrieskePhysician Assistant1104610237
- Erin ClarkPediatric Nurse Practitioner1770177941
- John Countiss, M.D.Internal Medicine Physician1144225921
- Sean Dunn, DPMFoot & Ankle Surgery Podiatrist1699001776
- Steven Eddy, FNPFamily Nurse Practitioner1235243007
Verify Edward Guy Groenhout in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD24207Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
8,062 Medicare Part D claims for 293 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 33 claims were for opioids.
Most prescribed
- Atorvastatin Calcium619 claims
- Lisinopril561 claims
- Losartan Potassium315 claims
- Levothyroxine Sodium308 claims
- Gabapentin233 claims
- Metformin Hcl Er231 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.
Bills Medicare through one group practice
- Chemawa Indian Health Center Dhhs Ihs Western Oregon Serv UnitSalem, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Edward Guy Groenhout among 2,116 internal medicine physician records in Oregon
Edward Guy Groenhout, M.D. is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1992 · median 2008 among the 1,232 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
35 internal medicine physician records list a practice address in Grants Pass
They are 35 of the 2,127 NPPES records with a practice address in Grants Pass, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Grants Pass → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Brandes, MDGrants Pass, OR 975271992700991
- John Countiss, M.D.Grants Pass, OR 975271144225921
- Haitham Haddad, M.D.Grants Pass, OR 975271922003714
- Dennis Minister, MDGrants Pass, OR 975271720193907
- Philip Murray, M.D.Grants Pass, OR 975271346245131
- Markus Opel, M.D.Grants Pass, OR 975271255336046
- Eric Perry, M.D.Grants Pass, OR 975271750387825
- Andrew Pitzak, DOGrants Pass, OR 975271679534002
Common questions
What is Edward Guy Groenhout, M.D.'s NPI number?
Edward Guy Groenhout, M.D.'s National Provider Identifier (NPI) is 1760487557, issued on Jun 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Edward Guy Groenhout, M.D. located?
The NPPES record lists a practice address at 495 SW Ramsey Ave, Grants Pass, OR, 97527. Phone: (541) 476-6644. Providers update this record themselves, so call before visiting.
How can I verify Edward Guy Groenhout, M.D.'s license?
NPPES lists Oregon license number MD24207, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Edward Guy Groenhout, M.D. prescribe under Medicare Part D?
In 2024, Edward Guy Groenhout, M.D. had 8,062 Medicare Part D claims for 293 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.