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Dennis Grewal, DO

Cardiovascular Disease Physician in Santa Ana, CA · enumerated 2015.

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

National Provider Identifier

1538556592

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Registry record

Entity type Individual (Type 1)
Name Dennis Grewal
Credential DO
Sex Male
Practice address 700 N Tustin Ave, Santa Ana, CA, 92705
Phone (714) 245-1444
Fax (714) 245-1444
Enumeration date Apr 16, 2015
Last updated in NPPES Apr 7, 2025

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 15476 (CA) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A15476 (CA) Secondary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

How do I verify Dennis Grewal's NPI record?
Cross-check NPI 1538556592 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1538556592 active?
Yes, as of the latest NPPES snapshot, NPI 1538556592 is active (record last updated 2025-04-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-07.