NPPES file of Aug 9, 2026

Samuel Joseph Buffington Roberts, DO

Nephrology Physician · Portland, OR

Samuel Joseph Buffington Roberts, DO is a nephrology physician with a practice address in Portland, Oregon, and NPI 1831775220, issued on Mar 24, 2021. Check the license (Oregon DO230783, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1831775220
Name
Samuel Joseph Buffington Roberts
Credential
DO
Primary taxonomy
Nephrology Physician 207RN0300X
License number
DO230783 OR
Self-reported in NPPES; status is on the state search
Practice location
3181 SW Sam Jackson Park RD, Portland, OR 97239
Phone
(503) 494-3442
Enumerated
Mar 24, 2021
Record last updated
Jul 29, 2026
Fax
(503) 494-5330
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 3181 SW Sam Jackson Park RD

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

  1. Alex AamodtCritical Care Medicine Registered Nurse1154257590
  2. Jefferson Abaricia, MD, PHDStudent in an Organized Health Care Education/Training Program1073215711
  3. Kenneth Abbey, MDAnesthesiology Physician1588779342
  4. Matthew Abbott, PA-CMedical Physician Assistant1154738003
  5. Ayah Abdelsalam Megahed, MD, MSCVascular & Interventional Radiology Physician1023503596
  6. Obada Abdulrazzak, MDStudent in an Organized Health Care Education/Training Program1598567430

Verify Samuel Joseph Buffington Roberts in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license DO230783    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

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70% fewer Medicare Part D claims than the average nephrology physician in 2024

433 Medicare Part D claims for 95 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 13 claims were for opioids.

  1. Samuel Roberts433
  2. Specialty average1,465

Most prescribed

  1. Atorvastatin Calcium30 claims
  2. Omeprazole22 claims
  3. Sertraline Hcl20 claims
  4. Eliquis17 claims
  5. Clopidogrel15 claims
  6. Gabapentin15 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.

Nephrology Physician providers in Oregon

There are 136 nephrology physician records in Oregon.

All 136 in Oregon → Every provider in Portland →

Other nephrology physician records in Oregon

  1. Wooin Ahn, M.D.Portland, OR1366608267
  2. Fadi Akoum, M.D.Hermiston, OR1952577231
  3. Sharon Anderson, MDPortland, OR1285642710
  4. Andreea Andone, M.D.Salem, OR1891711446
  5. Tyler Andrea, DOCorvallis, OR1295183291
  6. Nayan Arora, M.D.Portland, OR1700102159
  7. Rupali Avasare, M.D.Portland, OR1265676324
  8. Susan Bagby, MDPortland, OR1245245760
  9. William Bennett, MDPortland, OR1457320525
  10. Poojitha Beravol, M.D.Corvallis, OR1073749396

Common questions

What is Samuel Joseph Buffington Roberts, DO's NPI number?

Samuel Joseph Buffington Roberts, DO's National Provider Identifier (NPI) is 1831775220, issued on Mar 24, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Samuel Joseph Buffington Roberts, DO located?

The NPPES record lists a practice address at 3181 SW Sam Jackson Park RD, Portland, OR, 97239. Phone: (503) 494-3442. Providers update this record themselves, so call before visiting.

How can I verify Samuel Joseph Buffington Roberts, DO's license?

NPPES lists Oregon license number DO230783, 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 Samuel Joseph Buffington Roberts, DO prescribe under Medicare Part D?

In 2024, Samuel Joseph Buffington Roberts, DO had 433 Medicare Part D claims for 95 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.

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.