Mary Lee Villanueva, MD
NPI 1699857821 · Hematology & Oncology Physician · Yankton, SD
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Lee Villanueva, MD is a Hematology & Oncology Physician provider in Yankton, SD (NPI 1699857821).
Provider details
- NPI number
- 1699857821
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 6096 (SD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,287 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Injection of Additional New Drug Or Substance Into Vein96375 | 540 | $15 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 523 | $165 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 474 | $125 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 383 | $14 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 305 | $28 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 258 | $26 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 96 | 29 |
| Letrozole | 91 | 23 |
| Levothyroxine Sodium | 27 | 11 |
| Prednisone | 22 | — |
| Acyclovir | 18 | — |
| Exemestane | 18 | — |
| Omeprazole | 18 | — |
| Ondansetron Hcl | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$78 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-19
- Last updated
- 2020-07-03
- Certified
- 2020-07-03
Frequently asked questions
- What is Mary Lee Villanueva's NPI number?
- Mary Lee Villanueva's National Provider Identifier (NPI) is 1699857821, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Lee Villanueva's specialty?
- Mary Lee Villanueva is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Lee Villanueva located?
- Mary Lee Villanueva's practice location on file with NPPES is 1104 W 8th St, Yankton, SD 57078-3306.
- What is Mary Lee Villanueva's phone number?
- The practice phone number listed in the NPPES registry for Mary Lee Villanueva is (605) 665-7841.
- Does Mary Lee Villanueva accept Medicare?
- Mary Lee Villanueva is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Lee Villanueva's NPI active?
- Yes — Mary Lee Villanueva's NPI (1699857821) is active in the NPPES registry as of the last update on 2020-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.