Markus H.a. Opel, M.D.
Internal Medicine Physician · Grants Pass, OR
Markus H.a. Opel, M.D. is an internal medicine physician with a practice address in Grants Pass, Oregon, and NPI 1255336046, issued on Jun 17, 2005. Check the license (Oregon MD18981, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Markus H.a. Opel
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD18981 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
- 150866 OR
- Medicare enrollment
- Enrolled (PECOS I20040524000371); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- 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 Markus H.a. Opel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD18981Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average internal medicine physician in 2024
8,696 Medicare Part D claims for 735 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 538 claims were for opioids.
Most prescribed
- Losartan Potassium442 claims
- Metoprolol Succinate441 claims
- Amlodipine Besylate338 claims
- Atorvastatin Calcium318 claims
- Lisinopril299 claims
- Levothyroxine Sodium295 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
- Grants Pass Clinic LLPGrants Pass, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Markus H.a. Opel among 2,116 internal medicine physician records in Oregon
Markus H.a. Opel, 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
- Graduated1989 · 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
- Edward Groenhout, M.D.Grants Pass, OR 975271760487557
- Haitham Haddad, M.D.Grants Pass, OR 975271922003714
- Dennis Minister, MDGrants Pass, OR 975271720193907
- Philip Murray, M.D.Grants Pass, OR 975271346245131
- Eric Perry, M.D.Grants Pass, OR 975271750387825
- Andrew Pitzak, DOGrants Pass, OR 975271679534002
Common questions
What is Markus H.a. Opel, M.D.'s NPI number?
Markus H.a. Opel, M.D.'s National Provider Identifier (NPI) is 1255336046, issued on Jun 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Markus H.a. Opel, 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 Markus H.a. Opel, M.D.'s license?
NPPES lists Oregon license number MD18981, 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 Markus H.a. Opel, M.D. prescribe under Medicare Part D?
In 2024, Markus H.a. Opel, M.D. had 8,696 Medicare Part D claims for 735 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.