Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Marissa Patricia Slattery
Behavior Analyst in Oak Lawn, IL · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1124503107
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Registry record
Entity type Individual (Type 1)
Name Ms. Marissa Patricia Slattery
Sex Female
Practice address 10201 S Cicero Ave Ste F, Oak Lawn, IL, 60453
Phone (708) 232-8763
Enumeration date Sep 26, 2018
Last updated in NPPES Aug 5, 2024
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-18-34017 (IL) Primary
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 Slattery?
Marissa Slattery is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Emily Quinn Speech-Language Pathologist · Oak Lawn, IL NPI 1053796615 Andrea Crumley Mental Health Counselor · Oak Lawn, IL NPI 1689111924 Kateryna Shcherbyna Behavior Analyst · Oak Lawn, IL NPI 1518431030 Ashley Landers Occupational Therapist · Oak Lawn, IL NPI 1952946709 Kaitlin Reid Behavior Analyst · Oak Lawn, IL NPI 1275165961 Melissa Inzinga Occupational Therapist · Oak Lawn, IL NPI 1649892282 Alexis Lemus Speech-Language Pathologist · Oak Lawn, IL NPI 1730859232 Nicole Lahey Speech-Language Pathologist · Oak Lawn, IL NPI 1477225654
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-05.