Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Mary Lee Hochstein Villanueva, MD

Individual provider Hematology & Oncology Physician · NPI 1699857821

Dr. Mary Lee Hochstein Villanueva, MD practises Internal Medicine in Yankton, South Dakota. Qualified in 2001, 25 years ago. Practices with Avera McKennan, a 962-clinician group, accepts Medicare assignment and offers telehealth. Licensed in South Dakota.

Years since qualifying
25
Licensed in
SD
In the registry since
2006
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

1104 W 8th St
Yankton, SD 57078-3306
Phone: (605) 665-7841
Fax: (605) 665-0546
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 6096 (SD)

Record details

NPI number1699857821
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 19, 2006
Last updated in NPPESJuly 3, 2020
Certification dateJuly 3, 2020

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Avera McKennan — 962 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients409
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Avera McKennan

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 962 clinicians in the practice; 12 are shown here.

Other providers in Yankton