Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Jennifer O'Neill Barr, MPH, RD, CDN, LDN

Individual provider Registered Dietitian · NPI 1629248687

Jennifer O'Neill Barr, MPH, RD, CDN, LDN is a Registered Dietitian OR Nutrition Professional in Downingtown, Pennsylvania. Qualified in 2003, 23 years ago. Accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
23
Licensed in
PA
In the registry since
2008
What do these letters mean?
MPH — Master of Public Health
A graduate degree in population health.
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

721 E Lancaster Ave
Downingtown, PA 19335-2719
Phone: (484) 680-5366
Fax: (484) 397-0310
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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 DN003201 (PA)

Record details

NPI number1629248687
Entity typeIndividual (Type 1)
GenderFemale
Credentials MPH , RD , CDN , LDN
Sole proprietorNo
NPI enumeratedMarch 6, 2008
Last updated in NPPESMay 17, 2017

Medicare enrollment

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

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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