Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Matthew T Piazza, D.C.

Chiropractor in Redwood City, CA · enumerated 2007 · practices at Matthew T Piazza Chiropractic PC.

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

National Provider Identifier

1114063401

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Matthew T Piazza

Credential D.C.

Sex Male

Practice address Redwood City, CA, 94063

Phone (650) 366-2211

Fax (650) 366-2351

Enumeration date Jan 30, 2007

Last updated in NPPES Feb 8, 2013

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License DC30382 (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
CQ969A	Other	CA	MEDICARE PTAN

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 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 Matthew Piazza?

Matthew Piazza is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Matthew T Piazza Chiropractic PC Chiropractor · Redwood City, CA NPI 1851857049 Erik Cabeza Chiropractor · Redwood City, CA NPI 1154046852

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-02-08.