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

Mrs. Katherine J Irwin, MS, RD, LDN, CNSC

Individual provider Nutritionist · NPI 1407362163

Mrs. Katherine J Irwin, MS, RD, LDN, CNSC is a Nutritionist in Oak Ridge, Tennessee. Works from 2 locations. Licensed in Tennessee.

Licensed in
TN
In the registry since
2017
Specialties on file
2
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.

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Practice location Address checks out

990 Oak Ridge Tpke
Oak Ridge, TN 37830-6976
Phone: (865) 835-4118
Fax: (865) 835-4122
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 7420 Stonington Ln, Knoxville, TN 37931-1859 — (865) 919-5426

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 2023 (TN)
Nutritionist Taxonomy 133N00000X · Licence 2023 (TN)

Record details

NPI number1407362163
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS , RD , LDN , CNSC
Sole proprietorNo
NPI enumeratedDecember 18, 2017
Last updated in NPPESJune 16, 2018