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

Mary Seiersen, RDE

Individual provider Nutritionist · NPI 1538282983

Mary Seiersen, RDE is a Nutritionist in Los Alamitos, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
Specialties on file
3

Practice location Address checks out

3851 Katella Ave Ste 275
Los Alamitos, CA 90720-3377
Phone: (562) 296-5528
Fax: (562) 296-8506
Show map & directions

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

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X
Nutritionist Taxonomy 133N00000X
Diabetes Educator Registered Nurse Taxonomy 163WD0400X · Licence 711000 (CA)

Record details

NPI number1538282983
Entity typeIndividual (Type 1)
GenderFemale
Credentials RDE
Sole proprietorNo
NPI enumeratedApril 9, 2007
Last updated in NPPESDecember 28, 2023
Certification dateDecember 28, 2023