# MARK S LOUDEN, MD
> **INTERNAL MEDICINE** · FULLERTON, CA
## Provider
- **NPI:** 1750368577
- **Credential:** MD
- **Primary specialty:** INTERNAL MEDICINE
- **Gender:** Male
- **Medical school:** DUKE UNIVERSITY SCHOOL OF MEDICINE
- **Graduation year:** 1985
## Practice
- **Address:** 101 E VALENCIA MESA DR, FULLERTON, CA 928353809
- **Phone:** 7148713280
- **Accepts Medicare assignment:** Yes (individual)
- **Telehealth:** No
## Source
- [NPI Registry](https://npiregistry.cms.hhs.gov/provider-view/1750368577)
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