Robert David Pfeffer, M.D.

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

MD00026712 Issued in WA

Practice address

216 14TH Ave SW
Sidney, MT 59270-3519

Phone

(406) 488-2100

NPI assigned

Oct 21, 2005

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 8

Medicare fee-for-service enrollment

Enrolled in WA, MT, IN3 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 3

Specialty

Radiation Oncology

Education

University of Washington School of Medicine, 1986

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Central Washington Health Services AssociationGroup PAC ID 4880504596, 708 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• St Peters Health Hospital, Helena, MT, CCN 270003
• Memorial Hospital Hospital, Logansport, IN, CCN 150072

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rpfeffer101354@edirect.chehr.org

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.

• Central Washington Health Services Association

  • Emergency Medical Services (Emergency Medicine) Physician
  • Wenatchee, WA
  • NPI 1801937453
  Medicare reassignment Care Compare group NPD
• Benefis Hospitals Inc

  • Multi-Specialty Clinic/Center
  • Great Falls, MT
  • NPI 1780968974
  Medicare reassignment NPD
• Bozeman Health Deaconess Hospital

  • Family Medicine Physician
  • Bozeman, MT
  • NPI 1619347390
  Medicare reassignment NPD
• Northern Montana Hospital

  • Critical Access Hospital
  • Havre, MT
  • NPI 1427059070
  Medicare reassignment NPD
• Multicare Health System

  • Neurological Surgery Physician
  • Tacoma, WA
  • NPI 1497766638
  Medicare reassignment NPD
• Parkview Logansport Hospital, Inc.

  • General Acute Care Hospital
  • Logansport, IN
  • NPI 1942317656
  Medicare reassignment
• Benefis Hospitals, Inc.

  • General Acute Care Hospital
  • Great Falls, MT
  • NPI 1881650737
  NPD
• Bozeman Health Deaconess Hospital

  • Durable Medical Equipment & Medical Supplies
  • Bozeman, MT
  • NPI 1013733955
  NPD
• Bozeman Health Deaconess Hospital

  • Emergency Medicine Physician
  • Bozeman, MT
  • NPI 1437529112
  NPD
• Northern Montana Hospital

  • Clinic/Center
  • Havre, MT
  • NPI 1023169190
  NPD
• Northern Montana Hospital

  • Critical Access Hospital
  • Havre, MT
  • NPI 1578536355
  NPD
• Central Washington Health Services Association

  • General Acute Care Hospital
  • Wenatchee, WA
  • NPI 1881642239
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• St Peter'S Medical Group North

  • Family Medicine Physician
  • Helena, MT
  • NPI 1477844744

  Hospital

  Care Compare affiliation
• St. Peter'S Health

  • Family Medicine Physician
  • Helena, MT
  • NPI 1083869390

  Hospital

  Care Compare affiliation
• St. Peter'S Health

  • General Acute Care Hospital
  • Helena, MT
  • NPI 1528023520
  Care Compare affiliation
• St. Peter'S Hospital

  • Ambulance
  • Helena, MT
  • NPI 1760586481

  Hospital

  Care Compare affiliation
• Parkview Logansport Hospital Inc

  • General Acute Care Hospital
  • Logansport, IN
  • NPI 1356320469
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1129852800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775692800000",
    "number": "1679563639",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "SIDNEY HEALTH CENTER",
            "address_2": "14TH AVE SW",
            "city": "SIDNEY",
            "state": "MT",
            "postal_code": "59270"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "216 14TH AVE SW",
            "city": "SIDNEY",
            "state": "MT",
            "postal_code": "592703519",
            "telephone_number": "406-488-2100"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "PFEFFER",
        "first_name": "ROBERT",
        "middle_name": "DAVID",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-10-21",
        "last_updated": "2026-04-09",
        "certification_date": "2026-04-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "WA",
            "license": "MD00026712",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "ASURIS NW HEALTH",
            "identifier": "3255PF",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS OF IDAHO",
            "identifier": "KZ561",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE SHIELD OF IDAHO",
            "identifier": "000010150380",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "7670662",
            "state": null
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "807071800",
            "state": "ID"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "LABOR & INDUSTRIES",
            "identifier": "0142238",
            "state": "WA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "8417248",
            "state": "WA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "P00202524",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kelly C. O'Neal, MD
• Jodi A Oakland, DPT
• Kaylyn Marie Obert, RPH
• Sandra Eileen Olson, RPH
• Sarah Ann Perrault, LCPC, LAC
• Paul Pfennig, ACNS-BC, FNP-BC, ANP
• Edward Lewis Pierce, MD PC
• Prairie Hills Recovery Center
• R Laqua PC
• Rajohn Karanjai, M.D., P.C.

• Radiation Oncology Physician in Sidney, MT
• Providers in Sidney, MT by specialty
• Radiation Oncology Physician in Montana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 9, 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.

Verify at the official NPI Registry.