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

Shannon O'Brien, LCSW

Individual provider Clinical Social Worker · NPI 1962088062

Shannon O'Brien, LCSW is a Clinical Social Worker in Lancaster, California. Qualified in 2014, 12 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California, New Jersey, New York and Virginia.

Years since qualifying
12
Licensed in
CA, NJ, NY, VA
In the registry since
2021
Specialties on file
4
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

626 W Lancaster Blvd Unit 128
Lancaster, CA 93534-3108
Phone: (661) 434-5997
Fax: (877) 483-9786
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 89763 (CA)
Clinical Social Worker Taxonomy 1041C0700X · Licence 0904014443 (VA)
Clinical Social Worker Taxonomy 1041C0700X · Licence 102476 (NY)
Clinical Social Worker Taxonomy 1041C0700X · Licence 44SC06383300 (NJ)

Record details

NPI number1962088062
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedMarch 20, 2021
Last updated in NPPESApril 30, 2026
Certification dateApril 30, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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