Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Marlon Decastro, MD

Individual provider Internal Medicine Physician · NPI 1780643270

Dr. Marlon Decastro, MD is an Internal Medicine in Santa Rosa, California. Qualified in 1997, 29 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California and South Carolina.

Years since qualifying
29
Licensed in
CA, SC
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

500 Doyle Park Dr Ste 303
Santa Rosa, CA 95405-4558
Phone: (707) 303-8300
Fax: (707) 303-8301
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence C53594 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 23181 (SC)

Record details

NPI number1780643270
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 22, 2006
Last updated in NPPESMarch 7, 2023
Certification dateOctober 21, 2021
Mailing address500 Doyle Park Dr, Ste 303, Santa Rosa, CA 95405-4558

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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