John D. Oholleran, MD
Surgery Physician · Oregon City, OR
John D. Oholleran, MD is a surgery physician with a practice address in Oregon City, Oregon, and NPI 1912007220, issued on Sep 25, 2006. Check the license (Oregon MD215189, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- John D. Oholleran
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License numbers
- MD215189 OR
6073614 CA
G73614 CA
036150765 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1510 Division St Ste 210, Oregon City, OR 97045
- Phone
- (503) 723-6525
- Enumerated
- Sep 25, 2006
- Record last updated
- Feb 2, 2024
- Medicare enrollment
- Enrolled (PECOS I20230811003404); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 524 in Oregon → Look up another NPI →
Also registered at 1510 Division St Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Domreis, M.D.Surgery Physician1629168646
- Thomas Huber, MDGastroenterology Physician1740205830
- Eleazar Lawson, MDSurgery Physician1508976473
- Melissa Lin, M.D.Surgery Physician1659735751
- Tyler Mittelstaedt, MD-MPHSurgery Physician1053678284
- Shawn Morgan, MDSurgery Physician1477538064
Verify John D. Oholleran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD215189Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average surgery physician in 2024
39 Medicare Part D claims for 33 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 23 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen19 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
- Providence Health And Services OregonOregon City, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John D. Oholleran among 524 surgery physician records in Oregon
John D. Oholleran, MD is one of 524 surgery 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 53% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1987 · median 2005 among the 321 with a school on file
- Record last updated2024 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Oregon
There are 524 surgery physician records in Oregon.
All 524 in Oregon → Every provider in Oregon City → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- John Antolik, MDOregon City, OR 970451417927351
- John Domreis, M.D.Oregon City, OR 970451629168646
- Kevin Johnson, M.D.Oregon City, OR 970451750387049
- Eleazar Lawson, MDOregon City, OR 970451508976473
- Melissa Lin, M.D.Oregon City, OR 970451659735751
- Tyler Mittelstaedt, MD-MPHOregon City, OR 970451053678284
- Shawn Morgan, MDOregon City, OR 970451477538064
- Haruka Snow, MDOregon City, OR 970451891119947
Common questions
What is John D. Oholleran, MD's NPI number?
John D. Oholleran, MD's National Provider Identifier (NPI) is 1912007220, issued on Sep 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John D. Oholleran, MD located?
The NPPES record lists a practice address at 1510 Division St Ste 210, Oregon City, OR, 97045. Phone: (503) 723-6525. Providers update this record themselves, so call before visiting.
How can I verify John D. Oholleran, MD's license?
NPPES lists Oregon license number MD215189, 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 John D. Oholleran, MD prescribe under Medicare Part D?
In 2024, John D. Oholleran, MD had 39 Medicare Part D claims for 33 beneficiaries; the average among surgery physician prescribers was 147. 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.