Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew Audet Cain, M.D.

Clinical Cardiac Electrophysiology Physician in Saint Helena, CA · enumerated 2010 · practices at Gregory B. Smith, M.D., A.P.C..

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

National Provider Identifier

1912210931

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew Audet Cain

Credential M.D.

Sex Male

Practice address 6 Woodland Rd Ste 304, Saint Helena, CA, 94574

Phone (707) 963-7200

Fax (707) 963-7203

Enumeration date Jul 19, 2010

Last updated in NPPES May 17, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 125.057827 (IL) Secondary

207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License 18925 (NV) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 18925 (NV) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License Q5981 (TX) Secondary

207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License C193965 (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.

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Frequently asked questions

Is NPI 1912210931 active?

Yes, as of the latest NPPES snapshot, NPI 1912210931 is active (record last updated 2024-05-17).

How do I verify Matthew Cain's NPI record?

Cross-check NPI 1912210931 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 2024-05-17.