Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marissa H Simon, CCC-SLP

Speech-Language Pathologist in Glen Mills, PA · enumerated 2021.

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

National Provider Identifier

1558023432

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Registry record

Entity type Individual (Type 1)

Name Marissa H Simon

Credential CCC-SLP

Sex Female

Practice address 1020 Baltimore Pike Ste 210, Glen Mills, PA, 19342

Phone (484) 227-7999

Enumeration date Oct 8, 2021

Last updated in NPPES Oct 8, 2021

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License SL016015 (PA) Primary

Other identifiers

Identifier	Type	State	Issuer
SL016015	Other	PA	ASHA

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Marissa Simon?

The National Provider Identifier (NPI) for Marissa Simon is 1558023432, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marissa Simon practice?

The practice location on file with NPPES is in Glen Mills, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-08.