William Demarco, DO - Medicare Internal Medicine in Great Barrington, MA

William Demarco, DO is a medicare enrolled "Internal Medicine" physician in Great Barrington, Massachusetts. He went to University Of New England, College Of Osteo Medicine and graduated in 1984 and has 40 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Berkshire Medical Center Inc and his current practice location is 29 Lewis Ave, Great Barrington, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (413) 496-6820.

William Demarco is licensed to practice in Massachusetts (license number 59492) 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 1124103577.

Contact Information

William Demarco, DO
29 Lewis Ave,
Great Barrington, MA 01230
(413) 496-6820
(413) 496-6821

Map and Direction




Physician's Profile

Full NameWilliam Demarco
GenderMale
SpecialityInternal Medicine
Experience40 Years
Location29 Lewis Ave, Great Barrington, 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:
  • William Demarco attended and graduated from University Of New England, College Of Osteo Medicine in 1984
  NPI Data:
  • NPI Number: 1124103577
  • Provider Enumeration Date: 10/26/2006
  • Last Update Date: 01/24/2008
  Medicare PECOS Information:
  • PECOS PAC ID: 7315920097
  • Enrollment ID: I20040611001446

Medical Identifiers

Medical identifiers for William Demarco such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1124103577NPI-NPPES
3045161MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 59492 (Massachusetts)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Berkshire Medical Center Inc1355232711158

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. William Demarco allows following entities to bill medicare on his behalf.
Entity NameBerkshire Medical Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1295765261
PECOS PAC ID: 1355232711
Enrollment ID: O20040324000088

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. William Demarco 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
William Demarco, DO
725 North Street,
Pittsfield, MA 01201

Ph: (413) 496-6820
William Demarco, DO
29 Lewis Ave,
Great Barrington, MA 01230

Ph: (413) 496-6820

Reviews and Comments


Internal Medicine Doctors in Great Barrington, MA

Edward J Weiner, MD
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Phone: 413-528-8647    Fax: 413-528-8290
Renu Agarwal, MD FCCP
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Alan Inglis, MD
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Phone: 413-637-8921    Fax: 413-637-3137

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.