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SAMUEL JOSEPH BUFFINGTON ROBERTS DO
NPI 1831775220
Internal Medicine - Nephrology in Portland, OR

Active since March 24, 2021PECOS EnrolledAccepts Medicare Assignment
3181 SW SAM JACKSON PARK RD, PORTLAND, OR 97239(503) 494-3442(503) 494-5330 Get Directions Write a Review

NPPES record last updated: July 29, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 29, 2026, Nov 26, 2025, Mar 24, 2021 (3 updates tracked since 2021).

About Samuel Joseph Buffington Roberts Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SAMUEL JOSEPH BUFFINGTON ROBERTS DO (NPI 1831775220) is an individual nephrology provider in Portland, Oregon, licensed in Oregon (DO230783) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS and is a graduate of Arizona College Of Osteopathic Medicine Mid Western University (2021).

NPPES Registry Identity

NPI1831775220
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameSAMUEL JOSEPH BUFFINGTON ROBERTSCredential: DO
Location Address3181 SW SAM JACKSON PARK RDPortland, OR 97239-3011
Mailing Address3181 Sw Sam Jackson Park RdPortland, OR 97239-3011 · (503) 494-3442 · Fax (503) 494-5330
Phone(503) 494-3442
Fax(503) 494-5330
Sole ProprietorNo
Medical School CMSArizona College Of Osteopathic Medicine Mid Western UniversityGraduated 2021
Enumeration DateMarch 24, 2021
Last NPPES UpdateJuly 29, 20263 updates tracked since enumeration
NPPES CertifiedJuly 29, 2026
✔ NPI 1831775220 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in OR · DO230783
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
3181 SW SAM JACKSON PARK RD, Portland, OR 97239
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include PacificSource Health Plans, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Samuel Joseph Buffington Roberts Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3173923919
PECOS Enrollment IDI20260618002979
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Samuel Roberts reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Professional Services
Same address
General Practice
3181 SW SAM JACKSON PARK RD
Portland, OR 97239
  • Reassigned Medicare billing, Oregon enrollment
  • 2,212 clinicians in this Medicare group
NPI 1376709535 (503) 494-8311

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97239 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.16 typical visit price
range $58.99 – $176.88
Typical copayment $33.54 (range $14.74 – $44.22)
Most-billed visit code 99204
Established Patient
$103.51 typical visit price
range $19.32 – $144.79
Typical copayment $25.87 (range $4.83 – $36.19)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DONALD RICHARD SULLIVAN MD
Internal Medicine (Pulmonary Disease)
3181 SW SAM JACKSON PARK RD, UHN67
PORTLAND, OR 97239
Multnomah County (503) 494-6949
MRS. ANJALEE NIX ROWE NP
Nurse Practitioner (Acute Care)
3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239
Multnomah County (503) 494-3988
REEM HASAN MD
Internal Medicine
3181 SW SAM JACKSON PARK RD, PPV 350
PORTLAND, OR 97239
Multnomah County (503) 494-8562
DR. AMANDA D BALL PSY.D
Psychologist (Clinical)
3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239
Multnomah County (503) 494-6176
SUNSHINE WELSCH LMT
Massage Therapist
3181 SW SAM JACKSON PARK RD, 7D19
PORTLAND, OR 97239
Multnomah County (503) 494-8349
DR. ROBERT GENE MEALER M.D., PH.D.
Psychiatry & Neurology (Psychiatry)
3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239
Multnomah County (503) 494-6176
GREGORY HALL MD
Radiology (Diagnostic Radiology)
3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239
Multnomah County (503) 418-0990
DR. BURHAN AHMED MIAN MD
Student in an Organized Health Care Education/Training Program
3181 SW SAM JACKSON PARK RD
PORTLAND, OR 97239
Multnomah County (503) 494-8311

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Samuel Roberts's NPI number?

The NPI number for Samuel Roberts is 1831775220. It was assigned to this individual provider in the NPPES registry on March 24, 2021.

Where is Samuel Roberts located?

Samuel Roberts practices at 3181 SW Sam Jackson Park Rd, Portland, OR 97239. The listed phone number is (503) 494-3442.

What is Samuel Roberts's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Samuel Roberts enrolled in Medicare?

Yes. Samuel Roberts is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Samuel Roberts's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Samuel Roberts reassigns Medicare benefits to University Professional Services (Portland, OR). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Samuel Roberts's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Samuel Roberts accept?

Health plans from PacificSource Health Plans and Providence Health Plan list Samuel Roberts as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Samuel Roberts was last updated on July 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.