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Marlon DeCastro, MD
Practice accepting new patients.

Marlon DeCastro, MD

(707) 303-8300
Primary Specialties
  • Internal Medicine
Medical Groups & Affiliations
  • St. Joseph Health Medical Group
  • Additional Languages Spoken
    Tagalog

Primary Office

Address:
St. Joseph Health Medical Group
500 Doyle Park Dr.
Suite 303
Santa Rosa, CA 95405
Phone:
(707) 303-8300
Fax:
(707) 303-8301
Web Page:
www.stjosephhealth.org

Physician Bio

As an internist, Dr. DeCastro specializes in providing patient-centered care for adults of all ages. He is board certified in Internal Medicine and able to care for an individual's specific medical needs from preventive services to the diagnosis, treatment and management of acute and chronic conditions and diseases. He is especially adept at treating individuals with diabetes.

Dr. DeCastro received his medical degree from the University of the Philippines in Manila, and conducted an Internal Medicine residency at Nassau University Medical Center in East Meadow, New York. Most recently, Dr. DeCastro served as an attending physician at Clemson Health Center in South Carolina where he provided primary care to adults and served as lead investigator in several studies. While there, he also earned certification in the Diabetes Physician Recognition Program, presented by the National Committee for Quality Assurance.

Education

  • Medical School:
    University of the Philippines - Manila, Philippines
  • Internship:
    Nassau Univ Medical Center- East Meadow , NY
  • Residency:
    Nassau Univ. Medical Center- East Meadow , NY

Certifications

A.B.I.M.

Areas of Interest

Family Medicine, General Practice, Internal Medicine

Accepted Health Plans

  • HMO - AETNA
  • HMO - CIGNA
  • HMO - HEALTH NET
  • HMO - HEALTH NET SENIORITY PLUS