Malgorzata Mcmasters
NPI 1588878029 · Hematology & Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Malgorzata Mcmasters is a Hematology & Oncology Physician provider in Boston, MA (NPI 1588878029).
Provider details
- NPI number
- 1588878029
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 240551 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
638 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 260 | $124 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 235 | $152 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 96 | $102 |
| Biopsy and Aspiration of Bone Marrow Sample for Diagnosis38222 | 18 | $79 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 16 | $82 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Ruxolitinib Phosphatebrand: Jakafi | 27 |
| Acyclovir | 17 |
| Apixabanbrand: Eliquis | 13 |
| Prednisone | 12 |
| Venetoclaxbrand: Venclexta | 12 |
| Bosutinibbrand: Bosulif | 11 |
| Belumosudil Mesylatebrand: Rezurock | 11 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 450 Brookline AveBoston, MA 02215-5450Phone: (617) 632-1906
Registry dates
- Enumerated
- 2007-05-10
- Last updated
- 2026-02-04
- Certified
- 2026-02-04
Frequently asked questions
- What is Malgorzata Mcmasters's NPI number?
- Malgorzata Mcmasters's National Provider Identifier (NPI) is 1588878029, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Malgorzata Mcmasters's specialty?
- Malgorzata Mcmasters is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Malgorzata Mcmasters located?
- Malgorzata Mcmasters's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Malgorzata Mcmasters's phone number?
- The practice phone number listed in the NPPES registry for Malgorzata Mcmasters is (617) 726-2000.
- Does Malgorzata Mcmasters accept Medicare?
- Malgorzata Mcmasters is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Malgorzata Mcmasters's NPI active?
- Yes — Malgorzata Mcmasters's NPI (1588878029) is active in the NPPES registry as of the last update on 2026-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.