Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William G. Tsiaras, MD, PHD

Individual provider Internal Medicine Physician · NPI 1215255526

Dr. William G. Tsiaras, MD, PHD is a Dermatology in Boston, Massachusetts. Qualified in 2010, 16 years ago. Practices with Brigham and Womens Physicians Organization Inc, a 2,916-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts and Rhode Island.

Years since qualifying
16
Licensed in
MA, RI
In the registry since
2010
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

221 Longwood Ave Brigham Dermatology Associates
Boston, MA 02115-5804
Phone: (617) 732-4918
Fax: (617) 582-6060
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 259741 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence LP01895 (RI)
Dermatology Physician Taxonomy 207N00000X · Licence 247360 (MA)

Record details

NPI number1215255526
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMay 11, 2010
Last updated in NPPESMarch 19, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDERMATOLOGY
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Brigham And Womens Physicians Organization Inc — 2916 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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