Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Spencer Margaret Amstrup, DDS

General Practice Dentistry in Crystal, MN · enumerated 2020 · practices at Twin Smiles.

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

National Provider Identifier

1023634433

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Registry record

Entity type Individual (Type 1)

Name Dr. Spencer Margaret Amstrup

Credential DDS

Sex Female

Practice address 5237 Douglas Dr N, Crystal, MN, 55429

Phone (763) 536-1118

Enumeration date Jun 22, 2020

Last updated in NPPES Jul 27, 2021

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License D14636 (MN) Primary

1223G0001X General Practice Dentistry Dental Providers · License DDS-09788 (IA) Secondary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

Is NPI 1023634433 active?

Yes, as of the latest NPPES snapshot, NPI 1023634433 is active (record last updated 2021-07-27).

How do I verify Spencer Amstrup's NPI record?

Cross-check NPI 1023634433 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Kevan Cahow General Practice Dentistry · Crystal, MN NPI 1700945797 Twin Smiles Dentist · Crystal, MN NPI 1326479288

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-27.