Shannon O'Brien, LCSW
Clinical Social Worker · Lancaster, CA
Shannon O'Brien, LCSW is a clinical social worker with a practice address in Lancaster, California, and NPI 1962088062, issued on Mar 20, 2021. Check the license (California 89763, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Shannon O'Brien
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- 89763 CA
44SC06383300 NJ
102476 NY
0904014443 VA
Self-reported in NPPES; status is on the state search - Practice location
- 626 W Lancaster Blvd Unit 128, Lancaster, CA 93534
- Phone
- (661) 434-5997
- Enumerated
- Mar 20, 2021
- Record last updated
- Apr 30, 2026
- Fax
- (877) 483-9786
- Medicare enrollment
- Enrolled (PECOS I20231127000824); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 36,261 in California → Look up another NPI →
Verify Shannon O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 89763Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Shannon O'Brien among 36,261 clinical social worker records in California
Shannon O'Brien, LCSW is one of 36,261 clinical social worker records with a practice address in California. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2021, is newer than 77% of them.
- NPI issued2021 · 77% of these records are older, 19% newer
- In a Medicare fileNo · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated2014 · median 2012 among the 4,008 with a school on file
- Record last updated2026 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
235 clinical social worker records list a practice address in Lancaster
They are 235 of the 4,273 NPPES records with a practice address in Lancaster, and 36,261 clinical social worker records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 36,261 in California → Every provider in Lancaster → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Deborah Devine, LCSWLancaster, CA 935341104943695
- Minerva Garcia, A.C.S.W.Lancaster, CA 935341083809321
- Cynthia Harbour-Logan, LCSWLancaster, CA 935341477747392
- Rhonda Hart, ACSWLancaster, CA 935341710004254
- Amanda Hernandez-EspinozaLancaster, CA 935341710019328
- Marsha Houston, LCSWLancaster, CA 935341588775787
- Merla Huntley, LCSWLancaster, CA 935341750458626
- Jason Lambert, LCSWLancaster, CA 935341578513818
Common questions
What is Shannon O'Brien, LCSW's NPI number?
Shannon O'Brien, LCSW's National Provider Identifier (NPI) is 1962088062, issued on Mar 20, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Shannon O'Brien, LCSW located?
The NPPES record lists a practice address at 626 W Lancaster Blvd Unit 128, Lancaster, CA, 93534. Phone: (661) 434-5997. Providers update this record themselves, so call before visiting.
How can I verify Shannon O'Brien, LCSW's license?
NPPES lists California license number 89763, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.