NPPES file of Aug 9, 2026

Robert Scott Mahan, M.D.

Diagnostic Radiology Physician · Clackamas, OR

Robert Scott Mahan, M.D. is a diagnostic radiology physician with a practice address in Clackamas, Oregon, and NPI 1932291309, issued on Sep 29, 2006. Check the license (Oregon MD20055, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1932291309
Name
Robert Scott Mahan
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License numbers
MD20055 OR
ME0059661 FL
036-079566 IL
MD00038143 WA
Self-reported in NPPES; status is on the state search
Practice location
10180 SE Sunnyside RD, Clackamas, OR 97015
Phone
(503) 904-3043
Enumerated
Sep 29, 2006
Record last updated
Oct 30, 2025
Medicare enrollment
Enrolled (PECOS I20071029000606); accepts Medicare assignment
Medical or professional school
Vanderbilt University School Of Medicine, 1987
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest diagnostic radiology physician records → All 522 in Oregon → Look up another NPI →

Also registered at 10180 SE Sunnyside RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Aaron Abajian, MDDiagnostic Radiology Physician1942732300
  2. Samer Abufadil, MDInternal Medicine Physician1750437653
  3. Jeremy Adler, M.D.Anatomic Pathology & Clinical Pathology Physician1548617483
  4. Alejandro Aguilar, PA-CPhysician Assistant1740940006
  5. Usman Ahmad, D.O.Internal Medicine Physician1326288697
  6. Hyun Jung AhnPhysical Therapist1245014703

Verify Robert Scott Mahan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license MD20055    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oregon license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Kaiser Foundation Health Plan OF The NorthwestClackamas, OR

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Robert Scott Mahan among 522 diagnostic radiology physician records in Oregon

Robert Scott Mahan, M.D. is one of 522 diagnostic radiology physician records with a practice address in Oregon. 67% 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 8% of them.

  • NPI issued2006 · 8% of these records are older, 46% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 64% of these records are
  • Graduated1987 · median 2005 among the 334 with a school on file
  • Record last updated2025 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

48 diagnostic radiology physician records list a practice address in Clackamas

They are 48 of the 2,098 NPPES records with a practice address in Clackamas, and 522 diagnostic radiology physician records in Oregon.

All 522 in Oregon → Every provider in Clackamas → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Christa Blecher, MDClackamas, OR 970151376525790
  2. Clark Brixey, MDClackamas, OR 970151912916008
  3. Brian Dunkley, MDClackamas, OR 970151497702062
  4. Douglas Eisenberg, MDClackamas, OR 970151558345355
  5. Erik Foss, MDClackamas, OR 970151003884016
  6. Belinda Holland, M.D.Clackamas, OR 970151699790733
  7. Mark Hurt, M.D.Clackamas, OR 970151215042924
  8. Kevin La Cour, MDClackamas, OR 970151407855786

Common questions

What is Robert Scott Mahan, M.D.'s NPI number?

Robert Scott Mahan, M.D.'s National Provider Identifier (NPI) is 1932291309, issued on Sep 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Robert Scott Mahan, M.D. located?

The NPPES record lists a practice address at 10180 SE Sunnyside RD, Clackamas, OR, 97015. Phone: (503) 904-3043. Providers update this record themselves, so call before visiting.

How can I verify Robert Scott Mahan, M.D.'s license?

NPPES lists Oregon license number MD20055, 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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.