Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARIEL KAY LLANZA HERNANDEZ
NPI 1851883409
Speech-Language Pathologist in San Diego, CA

Q: What is Mariel Kay Hernandez's NPI number?

The NPI number for Mariel Kay Hernandez is 1851883409. It was assigned to this individual provider in the NPPES registry on May 30, 2018.

Q: What is Mariel Kay Hernandez's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Active since May 30, 2018

3551 REDWOOD ST, SAN DIEGO, CA 92104(858) 205-8660 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Mariel Kay Llanza Hernandez NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARIEL KAY LLANZA HERNANDEZ (NPI 1851883409) is an individual speech-language pathologist provider in San Diego, California, licensed in California (38390) and active in the NPI registry since May 2018.

NPPES Registry Identity

NPI1851883409

Entity TypeIndividualFemale

Primary Taxonomy235Z00000X

Provider Legal NameMARIEL KAY LLANZA HERNANDEZ

Location Address3551 REDWOOD STSan Diego, CA 92104-4823

Mailing Address3551 Redwood StSan Diego, CA 92104-4823

Phone(858) 205-8660

Sole ProprietorNo

Enumeration DateMay 30, 2018

Last NPPES UpdateSeptember 29, 2026

NPPES CertifiedSeptember 29, 2026

✔ NPI 1851883409 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers

Taxonomy Code235Z00000X

License✔ Licensed in CA · 38390

Definition

The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

3551 REDWOOD ST, San Diego, CA 92104

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mariel Kay Hernandez's NPI number?

The NPI number for Mariel Kay Hernandez is 1851883409. It was assigned to this individual provider in the NPPES registry on May 30, 2018.

Where is Mariel Kay Hernandez located?

Mariel Kay Hernandez practices at 3551 Redwood St, San Diego, CA 92104. The listed phone number is (858) 205-8660.

What is Mariel Kay Hernandez's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

When was this NPI record last updated?

The NPPES record for Mariel Kay Hernandez was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.