NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1992142046 M.D.
Verify on CMS → William Rafelson, M.D.
Hematology & Oncology Physician in Morristown, New Jersey.
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
794
Medicare Part D claims · 114 beneficiaries · Hematology & Oncology Physician avg: 847
MIPS score
89.6/100
▲ 6 pts above national avg 83.5 · Exceptional
Industry payments
$5.7K
111 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
William Rafelson, M.D. reported a CMS MIPS final score of 89.6/100 - above the 83.5 national average - and filed 794 Medicare Part D claims in 2023.
- 89.6/100
- MIPS score · +6 vs avg
- 794
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥56th
- pct among measured MIPS (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1992142046 · Hematology & Oncology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-ABOVE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH
- NPI-10 1992142046
- ENUM-MID 2013
- TAX-MID 11K Hematology &
- MIPS-ABOVE 89.6/100
- RX-LIGHT 794
- BOOK-THIN 323 in New Jersey
- PHOTO-FINISH Victoria Blinder · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Rafelson · this …
Rafelson · this provider
89.6 MIPS pts
- Luis Diaz · high…
Luis Diaz
89.6 MIPS pts
- Victoria Blinder…
Victoria Blinder
89.6 MIPS pts
- Jason Chan · near
Jason Chan
89.6 MIPS pts
- Andrew Chow · near
Andrew Chow
89.6 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
William Rafelson, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
90 ≥ 56th percentile 56% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where William Rafelson, M.D. sits
This provider among hematology & oncology physician peers
Across the 4,019 hematology & oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Rafelson, M.D. writes more Part D claims than 53% of them and scores higher on MIPS quality than 57% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one hematology & oncology physician peer from a representative sample of 60; the gold marker is William Rafelson, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Rafelson, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 William Rafelson, M.D.?
High performer (top quartile)Primary specialty
Hematology & Oncology Physician
Medicare Part D claims
794 6% vs specialty avg
MIPS final score
89.6/100 6.1 pts vs avg
Specialty distribution in New Jersey
How Hematology & Oncology Physician compares to other specialties among New Jersey providers
Medicare quality performance, MIPS
William Rafelson, M.D.'s 2023 MIPS final score plotted against the Hematology & Oncology Physician national average
- MIPS Final Score
- 89.6/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1992142046 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/30/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.6113
Final Score
Measured-score avg: 83.5
81.8956
Quality
Reporting: Group practice
Hospital and facility affiliations
Facilities where William Rafelson, 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.
Practice Associates Medical Group
Morristown, NJ
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for William Rafelson, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$5.7K
Largest payer
Exelixis Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
794
Total Claims
$2.7M
Total Drug Cost
114
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 863
- Total Day Supply
- 24,592
- Generic Drug Cost
- $250K
- Opioid Claims
- 15 (1.9% rate)
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 2.61
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Rafelson, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
175 claims
- Abiraterone Acetate
Abiraterone Acetate
173 claims
- Nubeqa
Nubeqa
71 claims
- Erleada 41
Erleada
41 claims
- Xtandi 35
Xtandi
35 claims
- Orgovyx 31
Orgovyx
31 claims
- Ondansetron Hcl 29
Ondansetron Hcl
29 claims
- Dexamethasone 22
Dexamethasone
22 claims
| Drug | Claims |
|---|---|
| Prednisone | 175 |
| Abiraterone Acetate | 173 |
| Nubeqa Darolutamide | 71 |
| Erleada Apalutamide | 41 |
| Xtandi Enzalutamide | 35 |
| Orgovyx Relugolix | 31 |
| Ondansetron Hcl | 29 |
| Dexamethasone | 22 |
| Gabapentin | 19 |
| Lenvima Lenvatinib Mesylate | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hematology & Oncology Physician Overview
How William Rafelson, 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
William Rafelson, M.D.'s 794 claims are below the specialty average of 847.
Nationwide Hematology & Oncology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Rafelson, both outside New Jersey so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (89.6 here).
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Hematology & Oncology Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Rafelson.
One of 323 Hematology & Oncology Physician providers enrolled in New Jersey, 5 are shown here.
Dr. Muhammad Abbasi
M.D.
Mountain Lakes, NJ
Dr. May Abdo-Matkiwsky
D.O.
Sparta, NJ
Dr. Stephen Abo
D.O.
Newark, NJ
Dr. Ahmed Abou Hussein
M.D.
Camden, NJ
Dr. Kenneth Adler
M.D,
Morristown, NJ
Compare Hematology & Oncology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is William Rafelson, M.D.'s specialty? ▼
William Rafelson, M.D. specializes in Hematology & Oncology Physician and practices in Morristown, New Jersey. Credentials: M.D..
How much does William Rafelson, M.D. prescribe under Medicare Part D? ▼
In 2023, William Rafelson, M.D. wrote 794 Medicare Part D claims totaling $2.7M in drug costs for 114 beneficiaries.
What is William Rafelson, M.D.'s Medicare quality score? ▼
William Rafelson, M.D. has a CMS MIPS Final Score of 89.6/100 (Quality: 81.9). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Rafelson, M.D. located? ▼
William Rafelson, M.D. is located at 100 MADISON AVE, Morristown, NJ, 07960. Phone: (973) 971-7960.
What is William Rafelson, M.D.'s NPI number? ▼
William Rafelson, M.D.'s National Provider Identifier (NPI) is 1992142046, issued on 05/30/2013.
Does William Rafelson, M.D. prescribe opioids? ▼
Yes, William Rafelson, M.D. had 15 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
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.
What drugs does William Rafelson, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Rafelson, M.D.'s most frequently prescribed drugs include Prednisone, Abiraterone Acetate, Nubeqa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Rafelson, M.D. accept Medicare? ▼
William Rafelson, M.D. appears in CMS Medicare data with 794 Part D claims and 114 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Rafelson, M.D.'s credentials? ▼
William Rafelson, M.D.'s NPI is 1992142046 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.