Mary Malecek, MD
NPI 1144647355 · Hematology & Oncology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Malecek, MD is a Hematology & Oncology Physician provider in Saint Louis, MO (NPI 1144647355).
Provider details
- NPI number
- 1144647355
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 2017010068 (MO)
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
12 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
972 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 460 | $93 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 132 | $76 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 130 | $138 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 66 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 56 | $63 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 104 | 34 |
| Hydroxyurea | 96 | 26 |
| Anastrozole | 79 | 18 |
| Zanubrutinibbrand: Brukinsa | 67 | — |
| Apixabanbrand: Eliquis | 64 | 14 |
| Acalabrutinib Maleatebrand: Calquence | 59 | — |
| Rivaroxabanbrand: Xarelto | 58 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$250 across 8 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
- 2014-03-25
- Last updated
- 2021-10-29
- Certified
- 2021-10-29
Frequently asked questions
- What is Mary Malecek's NPI number?
- Mary Malecek's National Provider Identifier (NPI) is 1144647355, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Malecek's specialty?
- Mary Malecek is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Malecek located?
- Mary Malecek's practice location on file with NPPES is 3015 N Ballas Rd, Saint Louis, MO 63131-2329.
- What is Mary Malecek's phone number?
- The practice phone number listed in the NPPES registry for Mary Malecek is (314) 996-5151.
- Does Mary Malecek accept Medicare?
- Mary Malecek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Malecek's NPI active?
- Yes — Mary Malecek's NPI (1144647355) is active in the NPPES registry as of the last update on 2021-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.