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

Nick Mashour, MD

Individual provider Internal Medicine Physician · NPI 1508896515

Nick Mashour, MD is an Internal Medicine Physician in Costa Mesa, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

125 Baker St E Ste 180
Costa Mesa, CA 92626-4509
Phone: (714) 540-5900
Fax: (714) 540-5906
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A72007 (CA)

Record details

NPI number1508896515
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 4, 2006
Last updated in NPPESJanuary 31, 2013
Mailing addressPo Box 1867, Huntington Beach, CA 92647-1867

Other providers in Costa Mesa