Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dennis Grewal, DO

Individual provider Cardiovascular Disease Physician · NPI 1538556592

Dennis Grewal, DO is a Cardiovascular Disease (Cardiology) in Santa Ana, California. Qualified in 2015, 11 years ago. Practices with Cardiology Specialists of Orange County, a 9-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
11
Licensed in
CA
In the registry since
2015
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

700 N Tustin Ave
Santa Ana, CA 92705-3602
Phone: (714) 245-1444
Fax: (714) 245-1444
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 16300 Sand Canyon Ave Ste 201, Irvine, CA 92618-3712 — (949) 753-9150

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 15476 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 20A15476 (CA)

Record details

NPI number1538556592
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 16, 2015
Last updated in NPPESApril 7, 2025
Certification dateApril 7, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Cardiology Specialists Of Orange County — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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