Dr William Barry Casey, MD - Medicare Radiation Oncology in Worcester, MA

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Dr William Barry Casey, MD is a medicare enrolled "Radiology - Radiation Oncology" physician in Worcester, Massachusetts. He went to Georgetown University School Of Medicine and graduated in 1988 and has 37 years of diverse experience with area of expertise as Radiation Oncology. He is a member of the group practice Southcoast Physicians Group Inc, Mercy Medical Group Inc, Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc and his current practice location is 1 Eaton Pl, Worcester, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (508) 363-7100.

Dr William Barry Casey is licensed to practice in Massachusetts (license number 246019) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1811933047.

Contact Information

Dr William Barry Casey, MD
1 Eaton Pl,
Worcester, MA 01608-1232
(508) 363-7100
(508) 363-7170

Map and Direction




Physician's Profile

Full NameDr William Barry Casey
GenderMale
SpecialityRadiation Oncology
Experience37 Years
Location1 Eaton Pl, Worcester, Massachusetts
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr William Barry Casey attended and graduated from Georgetown University School Of Medicine in 1988
  NPI Data:
  • NPI Number: 1811933047
  • Provider Enumeration Date: 06/22/2006
  • Last Update Date: 03/04/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 6406854736
  • Enrollment ID: I20110113001068

Medical Identifiers

Medical identifiers for Dr William Barry Casey such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1811933047NPI-NPPES
44485361MedicaidCO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2085R0001XRadiology - Radiation Oncology 44895 (Colorado)Secondary
2085R0001XRadiology - Radiation Oncology 246019 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Southcoast Hospitals GroupFall river, MAHospital
Mercy Medical CtrSpringfield, MAHospital
Winchester HospitalWinchester, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Southcoast Physicians Group Inc0749171957789
Mercy Medical Group Inc236569802414
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc44865671041474

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr William Barry Casey allows following entities to bill medicare on his behalf.
Entity NameHarvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982644555
PECOS PAC ID: 4486567104
Enrollment ID: O20040315000313
Entity NameSouthcoast Physicians Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336137629
PECOS PAC ID: 0749171957
Enrollment ID: O20040920000138
Entity NameBeth Israel Deaconess Medical Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548202641
PECOS PAC ID: 8123936119
Enrollment ID: O20041001000827
Entity NameSaint Vincent Physician Services Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013997329
PECOS PAC ID: 8921056276
Enrollment ID: O20050104000566
Entity NameBmc Affiliated Physicians, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1245320910
PECOS PAC ID: 9830133123
Enrollment ID: O20050617000054
Entity NameSteward Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629398219
PECOS PAC ID: 2860688728
Enrollment ID: O20101119000007
Entity NameMercy Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316213143
PECOS PAC ID: 2365698024
Enrollment ID: O20120813000018

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr William Barry Casey is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr William Barry Casey, MD
1 Eaton Pl,
Worcester, MA 01608-1232

Ph: (508) 363-7100		Dr William Barry Casey, MD
1 Eaton Pl,
Worcester, MA 01608-1232

Ph: (508) 363-7100

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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