SIOBHAN MARK MS CCC-SLP
NPI 1487141974
Speech-Language Pathologist in Walnut Creek, CA

Q: What is Siobhan Mark's NPI number?

The NPI number for Siobhan Mark is 1487141974. It was assigned to this individual provider in the NPPES registry on April 19, 2018.

Q: What is Siobhan Mark's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Siobhan Mark was last updated on February 11, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.

Active since April 19, 2018

320 LENNON LN, WALNUT CREEK, CA 94598(925) 906-2000 Get Directions Write a Review

NPPES record last updated: February 11, 2022. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Feb 11, 2022, Apr 19, 2018 (2 updates tracked since 2018).

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About Siobhan Mark Ms Ccc-slp NPPES

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

SIOBHAN MARK MS CCC-SLP (NPI 1487141974) is an individual speech-language pathologist provider in Walnut Creek, California, licensed in California (12149) and active in the NPI registry since April 2018. She maintains a secondary practice location in Walnut Creek.

NPPES Registry Identity

NPI1487141974

Entity TypeIndividualFemale

Primary Taxonomy235Z00000X

Provider Legal NameSIOBHAN MARKCredential: MS CCC-SLP

Location Address320 LENNON LNWalnut Creek, CA 94598-2419

Mailing Address1242 Spruce StBerkeley, CA 94709-1433 · (510) 323-6946

Phone(925) 906-2000

Sole ProprietorYes

Enumeration DateApril 19, 2018

Last NPPES UpdateFebruary 11, 20222 updates tracked since enumeration

✔ NPI 1487141974 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 · 12149

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.

320 LENNON LN, Walnut Creek, CA 94598

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Secondary Practice Location 1

Location 11425 S Main StWalnut Creek, CA 94596-5318 · Phone (925) 295-4000

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LINDA MARIE HECKENLIVELY M.S., CCC-SLP

Speech-Language Pathologist