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William C. Dorion , CNP

Nurse Practitioner โ€ข Worcester, MA

Active NPI 1609403922 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

55 Lake Ave N
Worcester, MA 016550002

Call 5084211400 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

55 Lake Ave N

Worcester, MA 016550002

Telephone 5084211400
Fax 5084211490
Organization at the Same NPPES Address or Phone
Umass Memorial Medical Center Facility NPI 1679574933

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 2 distinct group names: Cep America Llc; Umass Memorial Medical Group Inc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

Sioux City College Of Medicine

Graduation Year

2020

Medicare patients

109 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $7,224 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Paid by Medicare

About $5,709 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $19.54 in 2024

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2024.

Guide: How to read an Open Payments record

Years since graduation

6 years (graduated 2020)

CMS Doctors and Clinicians data list 2020 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2020

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

William Dorion has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists William Dorion as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Worcester and Massachusetts

Billing and prescribing volume is not a quality rating.

Medicare Part B services

Fewer Medicare Part B services than 60% of clinicians listed under Nurse Practitioner in Worcester, MA (2024, 225 clinicians with data). Median for this group: 162. Middle half: 80 to 346.

Fewer Medicare Part B services than 75% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: 293. Middle half: 113 to 625.

Medicare-allowed amount

A lower Medicare-allowed amount than 70% of clinicians listed under Nurse Practitioner in Worcester, MA (2024, 225 clinicians with data). Median for this group: $13,875. Middle half: $6,625 to $26,061.

A lower Medicare-allowed amount than 80% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: $24,187. Middle half: $9,751 to $49,233.

Paid by Medicare

A lower Medicare payment amount than 70% of clinicians listed under Nurse Practitioner in Worcester, MA (2024, 225 clinicians with data). Median for this group: $10,316. Middle half: $4,844 to $19,689.

A lower Medicare payment amount than 75% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: $18,312. Middle half: $7,110 to $37,062.

499 active clinicians are listed under Nurse Practitioner with a practice address in Worcester, MA (3,483 in Massachusetts).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Worcester

17.8% of these 499 clinicians have the CMS telehealth indicator.

57.7% of these 499 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2024

Program year 2024 (payments made January 1 โ€“ December 31, 2024): fewer than 11 records totaling $19.54.

Manufacturer Payment Nature Product Type Amount ($)
GlaxoSmithKline, LLC.
Food and Beverage
In-kind items and services
AREXVY General $19.54

Source: CMS Open Payments, program year 2024, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024
Reporting Year:

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2019โ€“2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2020โ€“2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99238 Hospital discharge day management, 30 minutes or less
63 63 $250.00 $68.44
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
44 40 $238.00 $66.19

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2025-07-14
Nurse Practitioner Primary Specialty

NUCC Taxonomy Code: 363L00000X

License # reported to NPPES CT 12.013832

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Registered Nurse

NUCC Taxonomy Code: 163W00000X

License # reported to NPPES MA RN2291576

(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.

Nurse Practitioner

NUCC Taxonomy Code: 363L00000X

License # reported to NPPES MA RN2291576

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Emergency Medical Technician, Basic

NUCC Taxonomy Code: 146N00000X

License # reported to NPPES MA E0910097

A Basic EMT is an individual trained and certified to perform basic life support treatment in medical emergencies based on individual state boards.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Massachusetts Board of Registration in Medicine.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
110161526A (MA)

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - NURSE PRACTITIONER

Medicare Enrollment ID

I20241112001509

Enrollment State Jurisdiction

CT

PECOS Control ID

7517388986

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Cep America Llc

201 Chestnut Hill Rd, Stafford Springs, CT 060764005

Phone: 8606844251

Umass Memorial Medical Group Inc

55 Lake Ave N, Worcester, MA 016550002

Phone: 5083341000

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

40 listed
Dr. Steven Bird , MD

Emergency Medicine

NPI 1174514863

Doctor of Medicine (M.D.)

Marc Bisceglia , PA-C

Physician Assistant

NPI 1093749509

Physician Assistant (Certified)

Dr. Katherine Boyle , MD

Emergency Medicine

NPI 1104147842

Doctor of Medicine (M.D.)

Dr. Justin Briones , MD

Emergency Medicine

NPI 1104024017

Doctor of Medicine (M.D.)

Dr. Cameron Burke , MD

Emergency Medicine

NPI 1154908838

Doctor of Medicine (M.D.)

Jessie Christensen , CNP

Nurse Practitioner

NPI 1043652274

Certified Nurse Practitioner

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

10 Historical Events
๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 14, 2025

Registered Nurse (license number reported to NPPES: MA RN2291576)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) November 14, 2020

Emergency Medical Technician, Basic (license number reported to NPPES: MA E0910097)

๐Ÿ“
Updated Practice Location May 21, 2020

Registered at 55 LAKE AVE N, WORCESTER, MA 016550002 (Tel: 5084211400)

๐Ÿ“
Updated Business Mailing Address May 21, 2020

Registered at PO BOX 415348, BOSTON, MA 022415348

โœ…
NPI Profile Active March 25, 2020

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) March 25, 2020

Registered at 157 UNION ST, MARLBOROUGH, MA 017521228 (Tel: 5084815000)

๐Ÿ“
Business Mailing Address (Initial Record) March 25, 2020

Registered at 35 HARRINGTON AVE UNIT 1105, SHREWSBURY, MA 015455274 (Tel: 6179217017)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) March 25, 2020

Recorded as WILLIAM DORION, CNP

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) March 25, 2020

Nurse Practitioner (license number reported to NPPES: MA RN2291576)

๐ŸŸข
Initial NPI Registration & Enumeration March 25, 2020

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1609403922
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: March 25, 2020
Last Update: July 14, 2025
Sole Proprietor: No

Other Nurse Practitioners in Worcester

All Nurse Practitioners in Worcester

Mailing Address

Po Box 415348

Boston, MA 022415348

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.