Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marcie Ryan, PAC

Q: What is the NPI number for Marcie Ryan?

The National Provider Identifier (NPI) for Marcie Ryan is 1821102393, a Type 1 (individual) record in the CMS NPPES registry.

Physician Assistant in Danville, CA · enumerated 2006.

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

National Provider Identifier

1821102393

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Registry record

Entity type Individual (Type 1)

Name Marcie Ryan

Credential PAC

Sex Female

Practice address 4165 Blackhawk Plaza Cir Ste 100, Danville, CA, 94506

Phone (925) 736-7070

Enumeration date Aug 19, 2006

Last updated in NPPES Sep 15, 2017

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 21387 (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

Where does Marcie Ryan practice?

The practice location on file with NPPES is in Danville, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Marcie Ryan?

The National Provider Identifier (NPI) for Marcie Ryan is 1821102393, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-09-15.