Careers With St. Joseph Health

Our Values are more than just words.

They form the heart and soul of St. Joseph Health and are the prime reason we attract and retain high-caliber employees who believe in the sanctity of their work in our faith-based setting.

Recent News

Covenant Children’s NICU Caregivers Assist with Hurricane Harvey Evacuation

Covenant Children’s NICU Caregivers Assist with Hurricane Harvey Evacuation

| Contributor: kcbd Read More
Systems Embark on Making Health Care 'Friendly' for the Elderly

Systems Embark on Making Health Care 'Friendly' for the Elderly

| Contributor: Catholic Health World Read More
St. Joseph Hoag Health Hospitals Rank Among California's Best in Latest U.S. News & World Report's Listings of Best Hospitals

St. Joseph Hoag Health Hospitals Rank Among California's Best in Latest U.S. News & World Report's Listings of Best Hospitals

| Contributor: U.S. News & World Report Read More

Here you can find news articles and press releases from St. Joseph Health and it's locations.

About St. Joseph Health

SJH provides a full range of care facilities including 16 acute care hospitals, home health agencies, hospice care, outpatient services, skilled nursing facilities, community clinics and physician groups. All of our hospital and home health entities are accredited by the Joint Commission. In our award-winning facilities, SJH maintains a "continuum of care," matched to the diverse needs of the urban centers, smaller cities and rural communities who depend on us every day.

Giving back to the community. St. Joseph Health System Office

Marlon DeCastro, MD

Specialty
  • Internal Medicine
Additional Language Spoken
Tagalog
Address
St. Joseph Health Medical Group
500 Doyle Park Dr.
Suite 303
Santa Rosa, CA 95405
Accepting New Patients

Primary Office

Address
St. Joseph Health Medical Group
500 Doyle Park Dr.
Suite 303
Santa Rosa, CA 95405
Get Directions
Phone
(707) 303-8300
Fax
(707) 303-8301

More Information

Website
www.stjosephhealth.org
Medical Groups & Affiliations
  • St. Joseph Health Medical Group
  • Specialties & Education

    Specialties & Education

    Primary Specialties
    • Internal Medicine
    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
  • Biography

    Biography

    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.