Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen T Gardner, M.D.

Orthopaedic Surgery Physician in Mission Viejo, CA · enumerated 2008 · practices at Michael D. Burdi, M.D. Inc.

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

National Provider Identifier

1871753392

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Registry record

Entity type Individual (Type 1)

Name Stephen T Gardner

Credential M.D.

Sex Male

Practice address 26401 Crown Valley Pkwy Ste 101, Mission Viejo, CA, 92691

Phone (949) 348-4000

Enumeration date Jun 10, 2008

Last updated in NPPES Dec 4, 2024

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License A124837 (CA) Primary

207XX0005X Sports Medicine (Orthopaedic Surgery) Physician Allopathic & Osteopathic Physicians · License A124837 (CA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

What specialty is Stephen Gardner?

Stephen Gardner is registered in NPPES with the primary taxonomy of Orthopaedic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-04.