Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew U To, D.C.

Chiropractor in Carson, CA · enumerated 2006.

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

National Provider Identifier

1023193091

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew U To

Credential D.C.

Sex Male

Practice address 1000 E Dominguez St, #110, Carson, CA, 90746

Phone (310) 366-7553

Fax (310) 366-7545

Enumeration date Oct 26, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License DC27958 (CA) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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 1023193091 active?

Yes, as of the latest NPPES snapshot, NPI 1023193091 is active (record last updated 2007-07-08).

How do I verify Matthew To's NPI record?

Cross-check NPI 1023193091 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.