Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

David Mason Phd PC

Audiologist in Clayton, MO · enumerated 2006 · authorized official David Mason, President.

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

National Provider Identifier

1043244650

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Registry record

Entity type Organization (Type 2)

Legal business name David Mason Phd PC

Practice address 950 Francis Pl, Suite 200, Clayton, MO, 63105

Phone (314) 725-2686

Fax (314) 725-2680

Enumeration date Jul 10, 2006

Last updated in NPPES Apr 23, 2015

Taxonomy & classification

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 01496 (MO) Primary

237700000X Hearing Instrument Specialist Speech, Language and Hearing Service Providers · License 201191 (MO) Secondary

Authorized official

Name David Mason

Title President

Phone (314) 725-2686

Other identifiers

Identifier	Type	State	Issuer
332159417	Medicaid	MO	-
625233	Other	-	HEALTHLINK
3410673/7465525	Other	-	AETNA

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 is David Mason Phd PC located?

The practice location on file with NPPES is in Clayton, MO.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2015-04-23. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-23.