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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.

Marlon DeCastro, MD

4.7 out of 5 (123 Ratings)
Specialty
  • Internal Medicine
Additional Language Spoken
Tagalog, English
Medical Groups & Affiliations
  • St. Joseph Health Medical Group
  • St. Joseph Health Medical Network
Address
St. Joseph Health Santa Rosa - Doyle Park Internal Medicine Suite 303
500 Doyle Park Drive
Suite 303
Santa Rosa, CA 95405

Primary Office

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

More Information

Website
www.stjosephhealth.org
  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Internal Medicine
    Education & Training
    • Medical School
      University of the Philippines
    • Internship
      Nassau Univ Medical Center- East Meadow
    • Residency
      Nassau Univ. Medical Center- East Meadow
    Areas of Interest
    Family Medicine, General Practice, Internal Medicine
  • Biography

    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.
    Certifications
    A.B.I.M.
  • 20-Aug-2019
    I wanted Dr. DeCastri to sign papers stating that I did not have TB. Am volunteering at the Kid Street Learning Center & needed these papers signed in addition to being fingerprinted & having a background check. He hadn't seen me for approximately a year & wanted to talk to me.
    17-Aug-2019
    *Dr. DeCastro is an excellent doctor. I have been told by a friend he is not friendly. He never tries to rush me. He always has answers. He doesn't waste my time or his.
    15-Aug-2019
    He is sweet and smiling. He is very good when he is explaining. He is perfect good job, *Dr Decastro C. Marlon.
    13-Aug-2019
    The doctor was attentive and knowledgeable. He treated me with respect and genuine concern for my wellness.
    12-Aug-2019
    *Dr. Decastro is taking very good care of me with serious medical problems and referrals St. Joseph Health is the best health provider.
    51 Total Comments Page 1 2 3 4 5 6 7 8 9 10 11   Next