Dr. Spencer Mack Hansen

Dr. Spencer Mack Hansen is a Orthodontics and Dentofacial Orthopedics Dentistry provider (Dentist) practicing in Longview, TX, registered in the NPPES registry with NPI 1336505635 since 2016. Practices at Mack and Hansen Orthodontics, Pllc (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1336505635
Entity type	Individual (Type 1)
Name	Dr. Spencer Mack Hansen
Sex	Female
Practice address	Longview, TX, 75601
Phone	9032127737
Enumeration date	2016-01-04
Last updated in NPPES	2022-10-24

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223X0400X	Orthodontics and Dentofacial Orthopedics Dentistry	Primary	30007	TX

Copy-ready billing details

Provider: Spencer Hansen
NPI: 1336505635
Taxonomy: 1223X0400X (Orthodontics and Dentofacial Orthopedics Dentistry)
Address: Longview, TX, 75601

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1942699087	Andrew Hansen	Individual	Orthodontics and Dentofacial Orthopedics Dentistry	Longview, TX
1033628920	Mack and Hansen Orthodontics, Pllc	Organization	Orthodontics and Dentofacial Orthopedics Dentistry	Longview, TX

Verify this record

Cross-check NPI 1336505635 against the authoritative CMS record: view Dr. Spencer Mack Hansen 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 Spencer Hansen?

Spencer Hansen is registered in NPPES with the primary taxonomy of Orthodontics and Dentofacial Orthopedics Dentistry. 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 2022-10-24.