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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Arlene Calvino O'Connor, PSY.D.

Clinical Psychologist in Mission Viejo, CA · enumerated 2007 · practices at Madnik, Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1174659627

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Registry record

Entity type Individual (Type 1)
Name Dr. Arlene Calvino O'Connor
Credential PSY.D.
Sex Female
Practice address Mission Viejo, CA, 92691
Phone (310) 993-8188
Enumeration date Feb 26, 2007
Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY18396 (CA) Primary
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Arlene O'Connor practice?
The practice location on file with NPPES is in Mission Viejo, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Arlene O'Connor?
The National Provider Identifier (NPI) for Arlene O'Connor is 1174659627, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.