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

Donald Mahon, MD

Individual provider Specialist · NPI 1255335659

Donald Mahon, MD is a Cardiovascular Disease (Cardiology) in Orange, California. Graduated from Baylor College of Medicine in 1982, 44 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
44
Trained at
Baylor College of Medicine
Licensed in
CA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1140 W La Veta Ave Ste 430
Orange, CA 92868-4226
Phone: (714) 543-5555
Fax: (714) 836-2427
Show map & directions

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

Additional practice locations (1)

  • 700 N Tustin Ave, Santa Ana, CA 92705-3602 — (714) 245-1444

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence C41581 (CA)
Specialist Taxonomy 174400000X · Licence C41581 (CA)

Record details

NPI number1255335659
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2005
Last updated in NPPESNovember 8, 2021
Certification dateNovember 8, 2021
Mailing address1140 W La Veta Ave Ste 430, Orange, CA 92868-4226

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolBAYLOR COLLEGE OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

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