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

Primary Office

Address
Internal Medicine – Doyle Park 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.
  • 4-Jun-2019
    Felt very comfortable w Dr DeCastro. He listened to me and discussed his thoughts with me.
    29-May-2019
    no comment everything is good .
    26-May-2019
    feel at ease at all time. thanks for your concern.
    16-May-2019
    Dr. DeCastro always has my best interests in mind. There is a medication I need that is not covered by insurance. I told him it was too expensive at my usual pharmacy ($99). He suggested another pharmacy where the savings were over $82 (it cost about $16.99), and I received 120 more capsules for the price. I was impressed with his knowledge and for the great suggestion. I feel I can trust him, and that he is a top notch doctor.
    15-May-2019
    Very good experience was very happy to meet my new doctor and he was very nice and very thorough and he definitely cares about his patients and I'm looking forward to seeing him in the future thank you very much dr. Decastro
    42 Total Comments Page 1 2 3 4 5 6 7 8 9   Next