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

Mallory Sin, LDN, RD

Individual provider Registered Dietitian · NPI 1821426826

Mallory Sin, LDN, RD is a Registered Dietitian OR Nutrition Professional in Boston, Massachusetts. Qualified in 2012, 14 years ago. Practices with Alisonrd LLC, a 3-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
14
Licensed in
MA
In the registry since
2013
What do these letters mean?
LDN — Licensed Dietitian Nutritionist
A state-licensed dietitian nutritionist.
RD — Registered Dietitian
A credentialed nutrition professional.

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Practice location Partly verified

Some contact details are missing from the federal record.

One Joslin Pl
Boston, MA 02215-3432
Phone: (917) 825-0376
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1290 Tremont St, Roxbury, MA 02120-3432 — (617) 427-1000

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 1076733 (MA)

Record details

NPI number1821426826
Entity typeIndividual (Type 1)
GenderFemale
Credentials LDN , RD
Sole proprietorNo
NPI enumeratedOctober 29, 2013
Last updated in NPPESNovember 27, 2018
Mailing address1290 Tremont St, Roxbury, MA 02120-3432

Medicare enrollment

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

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Alisonrd Llc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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