Active NPI
Samuel Joseph Buffington Roberts, DO
- Nephrology Physician
- Portland, OR
National Provider Identifier
1831775220
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Nephrology Physician
- License
- DO230783
- Practice address
- 3181 SW Sam Jackson Park Rd
Portland, OR 97239-3011 - Phone
- (503) 494-3442
- Fax
- (503) 494-5330
- NPI assigned
- Mar 24, 2021
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Nephrology Physician | 207RN0300X | DO230783 | OR | Primary |
Addresses
Primary practice location
3181 SW Sam Jackson Park Rd
Portland, OR 97239-3011
Mailing address
3181 SW Sam Jackson Park Rd
Portland, OR 97239-3011
Phone (503) 494-3442
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in OR
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Nephrology
- Education
- Arizona College of Osteopathic Medicine Mid Western University, 2021
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
3181 SW Sam Jackson Park Rd
Portland, OR 97239-3011
Phone (503) 494-8311
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Osteopathy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| PG226441 | OR | MD | Nephrology Physician |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- General Practice Physician
- Portland, OR
- NPI 1376709535
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1616544000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1785283200000",
"number": "1831775220",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3181 SW SAM JACKSON PARK RD",
"city": "PORTLAND",
"state": "OR",
"postal_code": "972393011",
"telephone_number": "503-494-3442",
"fax_number": "503-494-5330"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3181 SW SAM JACKSON PARK RD",
"city": "PORTLAND",
"state": "OR",
"postal_code": "972393011",
"telephone_number": "503-494-3442",
"fax_number": "503-494-5330"
}
],
"practiceLocations": [],
"basic": {
"last_name": "ROBERTS",
"first_name": "SAMUEL",
"middle_name": "JOSEPH BUFFINGTON",
"credential": "DO",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2021-03-24",
"last_updated": "2026-07-29",
"certification_date": "2026-07-29",
"status": "A"
},
"taxonomies": [
{
"code": "207RN0300X",
"taxonomy_group": "",
"desc": "Internal Medicine, Nephrology",
"state": "OR",
"license": "DO230783",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Portland, OR
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 29, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.