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

Individual provider Registered Dietitian · NPI 1508686023

Isabella Katherine Oldham, RDN, LDN is a Registered Dietitian in Irvine, California. Licensed in California. Registered with an NPI since 2024.

Licensed in
CA
In the registry since
2024
What do these letters mean?
RDN — Registered Dietitian Nutritionist
The current title for a registered dietitian.
LDN — Licensed Dietitian Nutritionist
A state-licensed dietitian nutritionist.

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Practice location Address checks out

19501 Sierra Mia Rd
Irvine, CA 92603-3818
Phone: (949) 648-0103
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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 86198144 (CA)

Record details

NPI number1508686023
Entity typeIndividual (Type 1)
GenderFemale
Credentials RDN , LDN
Sole proprietorNo
NPI enumeratedOctober 10, 2024
Last updated in NPPESOctober 10, 2024
Certification dateOctober 10, 2024

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