Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mark E Williams, MD

Individual provider Specialist · NPI 1184653891

Dr. Mark E Williams, MD is a Nephrology in Boston, Massachusetts. Graduated from Indiana University School of Medicine in 1977, 49 years ago. Practices with Joslin Clinic Inc, a 54-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
49
Trained at
Indiana University School of Medicine
Licensed in
MA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1 Joslin Pl
Boston, MA 02215-5306
Phone: (617) 732-2477
Fax: (617) 732-2467
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 45103 (MA)
Specialist Taxonomy 174400000X · Licence 45103 (MA)

Record details

NPI number1184653891
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 3, 2006
Last updated in NPPESApril 25, 2011
Mailing address31 Hereford St, Boston, MA 02115-1718

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice Joslin Clinic Inc — 54 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations8 on file with Medicare

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