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

Dr. Xiomara Michelle Castillo Rivera, MD

Individual provider Internal Medicine Physician · NPI 1740866599

Dr. Xiomara Michelle Castillo Rivera, MD is an Internal Medicine in Newport, Oregon. Graduated from Ponce School of Medicine in 2019, 7 years ago. Practices with County of Lincoln, a 27-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona, Nevada and Oregon.

Years since qualifying
7
Trained at
Ponce School of Medicine
Licensed in
AZ, NV, OR
In the registry since
2021
Specialties on file
3
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

36 SW Nye St
Newport, OR 97365-3821
Phone: (541) 265-4947
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 745 W Moana Ln Ste 300, Reno, NV 89509-4980 — (775) 327-5471

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD227151 (OR)
Internal Medicine Physician Taxonomy 207R00000X · Licence 26810 (NV)
Internal Medicine Physician Taxonomy 207R00000X · Licence 75107 (AZ)

Record details

NPI number1740866599
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 22, 2021
Last updated in NPPESFebruary 11, 2026
Certification dateFebruary 11, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolPONCE SCHOOL OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice County Of Lincoln — 27 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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