Sidney P Williamson Jr., MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

10418 Issued in MT

Practice address

915 Highland Blvd
Bozeman, MT 59715-6902

Phone

(406) 585-5000

NPI assigned

Oct 11, 2006

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 3

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in MT

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 1

Specialty

Emergency Medicine

Education

Other, 1999

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Bozeman Health Deaconess HospitalGroup PAC ID 4688984164, 309 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Bozeman Health Deaconess Hospital Hospital, Bozeman, MT, CCN 270057

Merit-based Incentive Payment System (MIPS)

Final score

87.04 of 100Reported as group

Quality

84.13

Promoting interoperability

100

Improvement activities

40

Cost

72.66

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: swilliamson236393@wm.providencedirect.org
• Direct secure messaging: sidney.williamson@605326376828932.direct.elationemr.com

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.

• Bozeman Health Deaconess Hospital

  • Family Medicine Physician
  • Bozeman, MT
  • NPI 1619347390
  Medicare reassignment Care Compare group NPD
• Barrett Hospital Development Corporation

  • Critical Access Hospital
  • Dillon, MT
  • NPI 1326042078
  Medicare reassignment NPD
• Barrett Hospital Development Corporation

  • Critical Access Hospital
  • Dillon, MT
  • NPI 1396286480
  Medicare reassignment NPD
• Barrett Hospital Development Corporation

  • Multi-Specialty Clinic/Center
  • Twin Bridges, MT
  • NPI 1265319255
  NPD
• Belgrade Clinic PLLP

  • Family Medicine Physician
  • Belgrade, MT
  • NPI 1447280912
  NPD
• Bozeman Health Deaconess Hospital

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

  • General Acute Care Hospital
  • Bozeman, MT
  • NPI 1104295864
  NPD (past)
• Phelps Memorial Hospital Association

  • Internal Medicine Physician
  • Sleepy Hollow, NY
  • NPI 1003908658
  NPD (past)
• Phelps Memorial Hospital Association

  • Emergency Medicine Physician
  • Sleepy Hollow, NY
  • NPI 1205851821
  NPD (past)

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

• Bozeman Health Deaconess Hospital

  • General Acute Care Hospital
  • Bozeman, MT
  • NPI 1104295864
  Care Compare affiliation

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

{
    "created_epoch": "1160524800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1744675200000",
    "number": "1649368044",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "915 HIGHLAND BLVD",
            "city": "BOZEMAN",
            "state": "MT",
            "postal_code": "597156902",
            "telephone_number": "406-414-5000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "915 HIGHLAND BLVD",
            "city": "BOZEMAN",
            "state": "MT",
            "postal_code": "597156902",
            "telephone_number": "406-585-5000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "SIDNEY",
        "middle_name": "P",
        "name_prefix": "Dr.",
        "name_suffix": "Jr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-11",
        "last_updated": "2025-04-15",
        "certification_date": "2025-04-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MT",
            "license": "10418",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE RAILROAD",
            "identifier": "P00031418",
            "state": null
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3502642",
            "state": "MT"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS MT",
            "identifier": "94845",
            "state": null
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "swilliamson7290920@direct.sanfordhealth.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "915 Highland Blvd",
            "city": "Bozeman",
            "state": "MT",
            "country_code": "US",
            "postal_code": "597156902",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Jessica Williams, LMHC
• Luke Williams
• Mesa Williams
• Tara Nicole Williams, PCLC
• Mary B Williamson
• Jessica Willmarth, COTA/L
• Willow Sage Chiropractic PLLC
• Jennifer E Wilshire, PT
• William Mann Wilshire IV, DPM
• Deborah Wilson, LCSW

• Emergency Medicine Physician in Bozeman, MT
• Providers in Bozeman, MT by specialty
• Emergency Medicine Physician in Montana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 15, 2025; 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.