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

Addison Grant Marshall

Physician Assistant in San Antonio, TX · enumerated 2018.

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

National Provider Identifier

1366911265

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Registry record

Entity type Individual (Type 1)

Name Addison Grant Marshall

Sex Male

Practice address San Antonio, TX, 78229

Phone (210) 358-4000

Enumeration date Nov 20, 2018

Last updated in NPPES May 24, 2019

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

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA12539 (TX) Primary

Other identifiers

Identifier	Type	State	Issuer
396471001	Medicaid	TX	-

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 1366911265 active?

Yes, as of the latest NPPES snapshot, NPI 1366911265 is active (record last updated 2019-05-24).

How do I verify Addison Marshall's NPI record?

Cross-check NPI 1366911265 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 2019-05-24.