Summary

Dr. Mary Villanueva is an oncologist and internal medicine physician who graduated from the Sanford School of Medicine of the University of South Dakota. With 25 years of experience treating cancer patients, she brings extensive knowledge to her practice in oncology and internal medicine. Dr. Villanueva is fluent in both English and Spanish, helping her connect with a diverse patient community.

Dr. Villanueva practices at Avera Saint Anthony's Hospital in O'Neill, Nebraska, and Avera Sacred Heart Hospital in Yankton, South Dakota. She specializes in treating breast cancer, including complex cases involving metastatic or recurrent disease, as well as Paget disease of the breast. Her clinical expertise includes performing comprehensive blood work and metabolic assessments to monitor patient health throughout treatment. Patients have given her an average rating of 4.8 out of 5 stars.

Overview based on verified provider data

Quick Facts

  • 4.8
  • 25 years of experience
  • speaks English, Spanish
  • Sanford School Of Medicine Of The University Of South Dakota
  • 15 written reviews
  • 2 specialties
  • 13 areas of expertise
  • 2 board certifications
  • 2 hospital affiliations
  • 2 office locations
  • Female

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Dr. Mary Lee Villanueva has 2 locations

Avera Saint Anthonys Hospital

300 N 2nd StOneill, NE 68763
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

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Dr. Mary Lee Villanueva, MD
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Dr. Mary Lee Villanueva, MDDr. Lon William Keim, MDDr. Enas Mazen Jawdat Al Zaghal, MDDr. Michael Paul Pietila, MD
OncologyPulmonologyEndocrinology, Diabetes & MetabolismCritical Care Medicine
Accepts New Patients Accepts New Patients
4.8 
3.7 
4.9 
4.9 
25 Years of Experience 56 Years of Experience 20 Years of Experience 26 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English, Spanish Speaks Spanish, English Speaks English, Spanish
Oneill , NEOneill , NENorfolk , NEYankton , SD
Med School: Sanford School Of Medicine Of The University Of South Dakota Med School: Virginia Commonwealth University School Of Medicine Med School: Fatima Jinnah Medical College For Women Med School: Sanford School Of Medicine Of The University Of South Dakota
Current Profile
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Insurance Plans Accepted by Dr. Dr. Mary Lee Villanueva

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Dr. Mary Lee Villanueva has the following 2 specialties

Specialty Expertise

Dr. Mary Lee Villanueva has the following 13 areas of expertise

  • Acute Myeloid Leukemia
  • Blood Cancer
  • Bone Marrow Transplant
  • Cancer
  • Chemotherapy
  • Chronic Myelomonocytic Leukemia
  • Deep Vein Thrombosis
  • Hepatitis C
  • Internal Medicine
  • Leukemia
  • Lymphoma
  • Myelofibrosis
  • Myeloma

Certifications, License, & Education

25 Years Experience

Dr. Dr. Mary Lee Villanueva holds an active medical license in the states of South Dakota and Nebraska.

Medical License

Medical Doctor with an active medical license in the state of South Dakota that expires in 2027 and an active medical license in the state of Nebraska that expires in 2026.

Education & Training

Medical School

Graduated from Sanford School Of Medicine Of The University Of South Dakota in 2001.

NPI Number

Dr. Villanueva's NPI number is 1699857821.

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Frequently Asked Questions

Is Dr. Mary Villanueva accepting new patients?
Dr. Mary Villanueva has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Does Dr. Mary Villanueva accept my insurance?
You can see the insurance plans that Dr. Mary Villanueva accepts on their Vitals profile.
What languages does Dr. Mary Villanueva speak?
Dr. Mary Villanueva speaks English and Spanish.
How can I make an appointment with Dr. Mary Villanueva?
You can find contact information for Dr. Mary Villanueva here on Vitals.
Does Dr. Mary Villanueva accept virtual/telehealth appointments?
Dr. Mary Villanueva has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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