Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Marissa Owsianik, PH.D.
Psychologist in New Haven, CT · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1730528431
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Marissa Owsianik
Credential PH.D.
Sex Female
Practice address 446a Blake St, Suite 200, New Haven, CT, 06515
Phone (203) 387-9400
Fax (888) 772-2160
Enumeration date Jun 17, 2013
Last updated in NPPES Nov 9, 2014
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License 020066 (NY) Secondary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Marissa Owsianik?
Marissa Owsianik is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Gail Barbagallo-Reeves Marriage & Family Therapist · New Haven, CT NPI 1952579252 Rebekah Jackson Psychologist · New Haven, CT NPI 1245523448 Cecilia Frometa Psychologist · New Haven, CT NPI 1376934000 Aminah Marshall Marriage & Family Therapist · New Haven, CT NPI 1053029942 Bianca Shastokas Social Worker · New Haven, CT NPI 1316725930 Kiefer Rodriguez Counselor · New Haven, CT NPI 1770326811
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-11-09.