Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sienna Hill
Behavior Technician in Troy, MI · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669913125
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Registry record
Entity type Individual (Type 1)
Name Sienna Hill
Sex Female
Practice address 3290 W Big Beaver Rd Ste 510, Troy, MI, 48084
Phone (303) 989-8169
Enumeration date Mar 17, 2017
Last updated in NPPES Jun 27, 2023
Taxonomy & licenses
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.
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 Sienna Hill?
Sienna Hill is registered in NPPES with the primary taxonomy of Behavior Technician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-27.