Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Alan Tilley, PA-C

Surgical Physician Assistant in Woodland, CA · enumerated 2006.

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

National Provider Identifier

1720177884

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Registry record

Entity type Individual (Type 1)

Name Mark Alan Tilley

Credential PA-C

Sex Male

Practice address 2081 Bronze Star Dr, Woodland, CA, 95776

Phone (530) 668-2600

Fax (530) 661-1081

Enumeration date Oct 12, 2006

Last updated in NPPES Nov 28, 2022

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA22733 (CA) Secondary

363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA22733 (CA) Primary

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

What specialty is Mark Tilley?

Mark Tilley is registered in NPPES with the primary taxonomy of Surgical Physician Assistant. 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 2022-11-28.