Dr William G Tsiaras, MD, PHD - Medicare Dermatology in Boston, MA

Dr William G Tsiaras, MD, PHD is a medicare enrolled "Dermatology" physician in Boston, Massachusetts. He graduated from medical school in 2010 and has 14 years of diverse experience with area of expertise as Dermatology. He is a member of the group practice Brigham And Womens Physicians Organization Inc and his current practice location is 221 Longwood Ave, Brigham Dermatology Associates, Boston, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (617) 732-4918.

Dr William G Tsiaras is licensed to practice in Massachusetts (license number 259741) 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 1215255526.

Contact Information

Dr William G Tsiaras, MD, PHD
221 Longwood Ave, Brigham Dermatology Associates,
Boston, MA 02115-5804
(617) 732-4918
(617) 582-6060

Map and Direction




Physician's Profile

Full NameDr William G Tsiaras
GenderMale
SpecialityDermatology
Experience14 Years
Location221 Longwood Ave, Boston, 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 G Tsiaras graduated from medical school in 2010
  NPI Data:
  • NPI Number: 1215255526
  • Provider Enumeration Date: 05/11/2010
  • Last Update Date: 03/19/2015
  Medicare PECOS Information:
  • PECOS PAC ID: 8921266628
  • Enrollment ID: I20141024000501

Medical Identifiers

Medical identifiers for Dr William G Tsiaras such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1215255526NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine LP01895 (Rhode Island)Secondary
207N00000XDermatology 247360 (Massachusetts)Secondary
207N00000XDermatology 259741 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Brigham And Women's HospitalBoston, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Brigham And Womens Physicians Organization Inc38704059882511

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 G Tsiaras allows following entities to bill medicare on his behalf.
Entity NameBrigham & Womens Physicians Organization Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033535497
PECOS PAC ID: 3870405988
Enrollment ID: O20150107001260

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 G Tsiaras 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 G Tsiaras, MD, PHD
221 Longwood Ave, Brigham Dermatology Associates,
Boston, MA 02115-5804

Ph: (617) 732-4918
Dr William G Tsiaras, MD, PHD
221 Longwood Ave, Brigham Dermatology Associates,
Boston, MA 02115-5804

Ph: (617) 732-4918

Reviews and Comments


Dermatology Doctors in Boston, MA

Erica Dommasch, MD
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Dr. Joseph C Kvedar, MD
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Dr. David Attar Hashemi, MD, MBA
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Practice Location: 450 Brookline Ave, Boston, MA 02215
Phone: 617-732-5500    

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.