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

Robert A. Portnoy, Ph.D

Speech-Language Pathologist in Maryland Heights, MO · enumerated 2026.

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

National Provider Identifier

1003725789

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Registry record

Entity type Individual (Type 1)

Name Robert A. Portnoy

Credential Ph.D

Sex Male

Practice address Maryland Heights, MO, 63043

Phone (314) 420-1907

Enumeration date Sep 7, 2026

Last updated in NPPES Sep 7, 2026

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

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 2006017610 (MO) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Robert Portnoy practice?

The practice location on file with NPPES is in Maryland Heights, MO. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Robert Portnoy?

The National Provider Identifier (NPI) for Robert Portnoy is 1003725789, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-09-07.