Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

MS. Sarah Butler Mazerall, MBA, MS, RD, LDN

Individual provider Registered Dietitian · NPI 1972733483

MS. Sarah Butler Mazerall, MBA, MS, RD, LDN is registered under Registered Dietitian OR Nutrition Professional in Boston, Massachusetts. Qualified in 2008, 18 years ago. Practices with Atrius Health Inc, a 1,205-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
18
Licensed in
MA
In the registry since
2009
What do these letters mean?
MBA — Master of Business Administration
A graduate business degree.
MS — Master of Science
A graduate science degree.
RD — Registered Dietitian
A credentialed nutrition professional.
LDN — Licensed Dietitian Nutritionist
A state-licensed dietitian nutritionist.

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Practice location Address checks out

133 Brookline Ave
Boston, MA 02215-3904 Not confirmed with CMS for 10 years — call before visiting
Phone: (617) 629-6444
Fax: (617) 629-6070
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 2734 (MA)

Record details

NPI number1972733483
Entity typeIndividual (Type 1)
GenderFemale
Credentials MBA , MS , RD , LDN
Sole proprietorNo
NPI enumeratedJuly 17, 2009
Last updated in NPPESOctober 29, 2015

Medicare enrollment

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

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Atrius Health Inc — 1205 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients34
Services billed 165 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Atrius Health Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1205 clinicians in the practice; 12 are shown here.

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