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

MS. Diane Catharine Darcy, MS, RD, LDN

Individual provider Registered Dietitian · NPI 1336449420

MS. Diane Catharine Darcy, MS, RD, LDN is a Registered Dietitian in Rockville, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2010
What do these letters mean?
MS — Master of Science
A graduate science degree.
RD — Registered Dietitian
A credentialed nutrition professional.
LDN — Licensed Dietitian Nutritionist
A state-licensed dietitian nutritionist.

See every abbreviation used in this directory →

Practice location Address checks out

15825 Shady Grove Rd Ste 140
Rockville, MD 20850-4008
Phone: (301) 869-9776
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence D01479 (MD)

Record details

NPI number1336449420
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS , RD , LDN
Sole proprietorYes
NPI enumeratedOctober 24, 2010
Last updated in NPPESJune 25, 2014

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