NPI Portal NPI Lookup & Verification

Joycelyn Michelle Dier

Joycelyn Michelle Dier is a Behavior Analyst provider (Behavior Analyst) practicing in Southfield, MI, registered in the NPPES registry with NPI 1366996779 since 2016.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI 1366996779
Entity type Individual (Type 1)
Name Joycelyn Michelle Dier
Sex Female
Practice address Southfield, MI, 48033
Phone 3132443509
Enumeration date 2016-08-15
Last updated in NPPES 2016-08-15

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

Taxonomy & licenses

Taxonomy code Specialty Primary License State
103K00000X Behavior Analyst Primary
Copy-ready billing details
Provider: Joycelyn Dier
NPI: 1366996779
Taxonomy: 103K00000X (Behavior Analyst)
Address: Southfield, MI, 48033

Other providers at this practice address

NPI Name Type Specialty Location
1497299036 Donovan Douglas Individual Other Technician Southfield, MI
1669993937 Santreis Cook Individual Pharmacist Southfield, MI

Verify this record

Cross-check NPI 1366996779 against the authoritative CMS record: view Joycelyn Michelle Dier on the official NPPES registry .

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 or validate an NPI number.

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 Joycelyn Dier?
Joycelyn Dier 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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-08-15.