Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Arthur Mash, MD

Q: What is the NPI number for Arthur Mash?

The National Provider Identifier (NPI) for Arthur Mash is 1669835930, a Type 1 (individual) record in the CMS NPPES registry.

Family Medicine Physician in Roseville, CA · enumerated 2016 · practices at Regents of the University of California.

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

National Provider Identifier

1669835930

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Registry record

Entity type Individual (Type 1)

Name Dr. Arthur Mash

Credential MD

Sex Male

Practice address 1620 E Roseville Pkwy Ste 200, Roseville, CA, 95661

Phone (916) 783-7109

Enumeration date Apr 3, 2016

Last updated in NPPES Oct 13, 2022

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 299835 (NY) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 173368 (CA) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Arthur Mash?

The National Provider Identifier (NPI) for Arthur Mash is 1669835930, a Type 1 (individual) record in the CMS NPPES registry.

Where does Arthur Mash practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-13.