NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1154511251 M.D.
Verify on CMS → Zsofia Stadler, M.D.
Hematology & Oncology Physician in Boston, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,232 in Hematology & Oncology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
19
Medicare Part D claims · Hematology & Oncology Physician avg: 847
MIPS score
89.6/100
▲ 7 pts above national avg 83.1 · Exceptional
What the federal data shows
Zsofia Stadler, M.D. reported a CMS MIPS final score of 89.6/100 - above the 83.1 national average - and filed 19 Medicare Part D claims in 2023.
- 89.6/100
- MIPS score · +7 vs avg
- 19
- Part D claims, 2023
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Zsofia Stadler, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
90 Top 42% higher than 58% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Zsofia Stadler, M.D. sits
This provider among hematology & oncology physician peers
Across the 4,233 hematology & oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Zsofia Stadler, M.D. writes more Part D claims than 1% of them and scores higher on MIPS quality than 60% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one hematology & oncology physician peer from a representative sample of 60; the gold marker is Zsofia Stadler, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Zsofia Stadler, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Zsofia Stadler, M.D.?
High performer (top quartile)Primary specialty
Hematology & Oncology Physician
Medicare Part D claims
19 98% vs specialty avg
MIPS final score
89.6/100 6.5 pts vs avg
Specialty distribution in Massachusetts
How Hematology & Oncology Physician compares to other specialties among Massachusetts providers
Medicare quality performance, MIPS
Zsofia Stadler, M.D.'s 2023 MIPS final score plotted against the Hematology & Oncology Physician national average
- MIPS Final Score
- 89.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hematology & Oncology Physician) - 89.6/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Zsofia Stadler, M.D. appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding M.D. credentials at BIDMC, Boston, MA, 02115, with a listed phone of (617) 667-9262. NPI 1154511251 was issued on 07/26/2007.
Medicare Part D records for calendar year 2023 show 19 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $498 in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 89.6/100 for the 2023 performance year (Quality 81.9), compared with the national average of 83.1.
Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,232 enrolled providers across 54 states and an average of 847 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1154511251 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 07/26/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.6113
Final Score
Avg: 83.1
81.8956
Quality
Reporting: Group practice
Hospital and facility affiliations
Facilities where Zsofia Stadler, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
According to CMS billing records, Zsofia Stadler, M.D. is affiliated with 3 Medicare-billing facilities.
Memorial Clinical Genetics Group
New York, NY
Memorial Medical Consultation Group
New York, NY
Memorial Solid Tumor Group
New York, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Zsofia Stadler, M.D.. To verify Zsofia Stadler, M.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
19
Total Claims
$498
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 28
- Total Day Supply
- 689
- Generic Drug Cost
- $444
Patient Demographics
- Average Patient Age
- 75.6 years
- Avg HCC Risk Score
- 1.47
Hematology & Oncology Physician Overview
How Zsofia Stadler, M.D. fits within the Hematology & Oncology Physician landscape nationally.
11,232
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider
Zsofia Stadler, M.D.'s 19 claims are below the specialty average of 847.
Nearby Hematology & Oncology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Stadler.
Dr. Gregory Abel
MD
Boston, MA
Dr. Rachel Abelman
MD
Boston, MA
Dr. Karim Abou-Nassar
MD
Boston, MA
Dr. Inas Abuali
M.D.
Boston, MA
Dr. Maureen Achebe
MD, MPH
Boston, MA
Compare Hematology & Oncology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology & Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Zsofia Stadler, M.D.'s specialty? ▼
Zsofia Stadler, M.D. specializes in Hematology & Oncology Physician and practices in Boston, Massachusetts. Credentials: M.D..
How much does Zsofia Stadler, M.D. prescribe under Medicare Part D? ▼
In 2023, Zsofia Stadler, M.D. wrote 19 Medicare Part D claims totaling $498 in drug costs for N/A beneficiaries.
What is Zsofia Stadler, M.D.'s Medicare quality score? ▼
Zsofia Stadler, M.D. has a CMS MIPS Final Score of 89.6/100 (Quality: 81.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Zsofia Stadler, M.D. located? ▼
Zsofia Stadler, M.D. is located at BIDMC, Boston, MA, 02115. Phone: (617) 667-9262.
What is Zsofia Stadler, M.D.'s NPI number? ▼
Zsofia Stadler, M.D.'s National Provider Identifier (NPI) is 1154511251, issued on 07/26/2007.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,232 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
Does Zsofia Stadler, M.D. accept Medicare? ▼
Zsofia Stadler, M.D. appears in CMS Medicare data with 19 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Zsofia Stadler, M.D.'s credentials? ▼
Zsofia Stadler, M.D.'s NPI is 1154511251 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.