William C. Dorion, CNP

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

12.013832 Issued in CT

Practice address

55 Lake Ave N
Worcester, MA 01655-0002

Phone

(508) 421-1400

Fax

(508) 421-1490

NPI assigned

Mar 25, 2020

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Other identifiers 1

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in MA, CT2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 2

Specialty

Nurse Practitioner

Education

Sioux City College of Medicine, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cep America LLCGroup PAC ID 6608056171, 995 clinicians

Umass Memorial Medical Group IncGroup PAC ID 4284539891, 2,494 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Umass Memorial Medical Center/University Campus Hospital, Worcester, MA, CCN 220163

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as apm

Quality

82.98

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Certified Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wdorion3789234@direct.trinity-health.org
• Direct secure messaging: wdorion332384@umassmemorial.direct-ci.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.

• Umass Memorial Medical Group Inc

  • Internal Medicine Physician
  • Worcester, MA
  • NPI 1760445373

  Nurse Practitioner

  Medicare reassignment Care Compare group NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Waterbury, CT
  • NPI 1700681202
  Medicare reassignment Care Compare group NPD
• Nes Medical Services of Northern Connecticut, P.C.

  • Emergency Medicine Physician
  • Putnam, CT
  • NPI 1447231865
  Medicare reassignment NPD
• Trinity Health of New England Provider Network Organization Inc

  dba Trinity Health Of New England Medical Group

  • Internal Medicine Physician
  • Hartford, CT
  • NPI 1003882812

  Nurse Practitioner

  Medicare reassignment NPD
• Umass Memorial Medical Group, Inc.

  dba Urgent Care Express at Harrington

  • Urgent Care Clinic/Center
  • Oxford, MA
  • NPI 1982381018
  NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Stafford Springs, CT
  • NPI 1427853936
  NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Fort Lauderdale, FL
  • NPI 1700747946
  NPD
• Nes Medical Services of Northern Connecticut, P.C.

  • Emergency Medicine Physician
  • Stafford Springs, CT
  • NPI 1194450478
  NPD
• Trinity Health of New England Provider Network Organization Inc

  dba Trinity Health Of New England Medical Group

  • Internal Medicine Physician
  • Waterville, ME
  • NPI 1134779531
  NPD

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

• Umass Memorial Medical Center, Inc.

  • General Acute Care Hospital
  • Worcester, MA
  • NPI 1831151455
  Care Compare affiliation

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

{
    "created_epoch": "1585094400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752451200000",
    "number": "1609403922",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 415348",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022415348"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 LAKE AVE N",
            "city": "WORCESTER",
            "state": "MA",
            "postal_code": "016550002",
            "telephone_number": "508-421-1400",
            "fax_number": "508-421-1490"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DORION",
        "first_name": "WILLIAM",
        "middle_name": "C.",
        "credential": "CNP",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-25",
        "last_updated": "2025-07-14",
        "certification_date": "2025-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "MA",
            "license": "RN2291576",
            "primary": false
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MA",
            "license": "RN2291576",
            "primary": false
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "CT",
            "license": "12.013832",
            "primary": true
        },
        {
            "code": "146N00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medical Technician, Basic",
            "state": "MA",
            "license": "E0910097",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "110161526A",
            "state": "MA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "wdorion332384@UmassMemorial.direct-ci.com",
            "affiliation": "N",
            "address_1": "55 Lake Ave N",
            "city": "Worcester",
            "state": "MA",
            "country_code": "US",
            "postal_code": "016550002",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0978.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "55 Lake Ave N",
            "city": "Worcester",
            "state": "MA",
            "country_code": "US",
            "postal_code": "016550002",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Kevin Robert Doray, AG-ACNP
• Fiona Jill St. Leger Dore, MD
• Lydia Dorey
• Jennifer Dorfman
• Jon D. Dorfman, MD
• Nelli G Dorman, MD
• Saryah Lynn Dorsett
• Michael A Dorsey, PA-C
• John P. Dorval, PA-C
• Giovana Dos Reis

• Nurse Practitioner in Worcester, MA
• Providers in Worcester, MA by specialty
• Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 14, 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.