Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Jennifer Mesisca, RD
Registered Dietitian in Irvine, CA · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1275490047
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Registry record
Entity type Individual (Type 1)
Name Jennifer Mesisca
Credential RD
Sex Female
Practice address 114 Pacifica Ste 450, Irvine, CA, 92618
Phone (949) 861-5583
Enumeration date Jan 5, 2026
Last updated in NPPES Jan 5, 2026
Taxonomy & licenses
133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 86043231 (CA) Primary
RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration.
About the RD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Jennifer Mesisca?
Jennifer Mesisca is registered in NPPES with the primary taxonomy of Registered Dietitian. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-05.