Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Stacy Mason, MA

Behavior Analyst in Collegeville, PA · enumerated 2009.

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

National Provider Identifier

1134356520

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Registry record

Entity type Individual (Type 1)

Name Ms. Stacy Mason

Credential MA

Sex Female

Practice address 3774 Ridge Pike, Collegeville, PA, 19426

Phone (610) 489-3340

Fax (610) 489-3375

Enumeration date Jun 12, 2009

Last updated in NPPES Jun 12, 2009

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 117910 (PA) Primary

Other identifiers

Identifier	Type	State	Issuer
100753390	Medicaid	PA	-

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.

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Frequently asked questions

How do I verify Stacy Mason's NPI record?

Cross-check NPI 1134356520 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1134356520 active?

Yes, as of the latest NPPES snapshot, NPI 1134356520 is active (record last updated 2009-06-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-12.