NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1902123458 M.D.
Verify on CMS → Yonatan Greenstein, M.D.
Critical Care Medicine (Internal Medicine) Physician in Newark, 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 6,646 in Critical Care Medicine (Internal Medicine) 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
93
Medicare Part D claims · 28 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
0%
generic claims · 54% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.3/100
▼ 10 pts below national avg 83.5 · Mid-tier
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Yonatan Greenstein, M.D. reported a CMS MIPS final score of 73.3/100 - below the 83.5 national average - and filed 93 Medicare Part D claims in 2023.
- 73.3/100
- MIPS score · -10 vs avg
- 93
- Part D claims, 2023
- 0%
- generic prescribing
- 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.
Yonatan Greenstein, 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.
73 ≥ 11th percentile 11% 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 Yonatan Greenstein, M.D. sits
This provider among critical care medicine (internal medicine) physician peers
Across the 1,548 critical care medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Yonatan Greenstein, M.D. writes more Part D claims than 17% of them and scores higher on MIPS quality than 10% - placing this provider in the lower-volume, lower-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 critical care medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Yonatan Greenstein, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Yonatan Greenstein, 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 Yonatan Greenstein, M.D.?
Below national averagePrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
93 91% vs specialty avg
MIPS final score
73.3/100 10.2 pts vs avg
Specialty distribution in New Jersey
How Critical Care Medicine (Internal Medicine) Physician compares to other specialties among New Jersey providers
Medicare quality performance, MIPS
Yonatan Greenstein, M.D.'s 2023 MIPS final score plotted against the Critical Care Medicine (Internal Medicine) Physician national average
- MIPS Final Score
- 73.3/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Critical Care Medicine (Internal Medicine) Physician) - 73.3/100 vs national avg 83.5
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).
Yonatan Greenstein, M.D. appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding M.D. credentials at 150 BERGEN ST RM I-354, Newark, NJ, 07103, with a listed phone of (973) 972-6111. NPI 1902123458 was issued on 04/23/2010.
Medicare Part D records for calendar year 2023 show 93 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $56K in drug spend, split 54% brand-name and 0% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.3/100 for the 2023 performance year (Quality 44.9, Cost 47.7), compared with the 83.5 average among clinicians with a measured score.
Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,646 enrolled providers across 53 states and an average of 1,069 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 | 1902123458 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/23/2010 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.2773
Final Score
Measured-score avg: 83.5
44.8928
Quality
47.6995
Cost
83
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Yonatan Greenstein, 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.
University Physician Associates OF New Jersey Inc
Newark, 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).
Brand vs generic prescribing mix · Brand-heavy
Yonatan Greenstein, M.D. - brand share 54.0%
Critical Care Medicine (Internal Medicine) Physician average
54% brand-name claims vs 0% generic, on 93 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
93
Total Claims
$56K
Total Drug Cost
28
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 132
- Total Day Supply
- 3,753
- Brand vs Generic
- 54% brand / 0% generic
- Brand Drug Cost
- $28K
Patient Demographics
- Average Patient Age
- 67.5 years
- Avg HCC Risk Score
- 2.91
- Gender Split
- 54% female / 46% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 21 |
| Symbicort Budesonide/Formoterol Fumarate | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine (Internal Medicine) Physician in NJ →
All providers in New Jersey →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Yonatan Greenstein, M.D. fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,646
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider
Yonatan Greenstein, M.D.'s 93 claims are below the specialty average of 1,069.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Greenstein.
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 New Jersey medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Critical Care Medicine (Internal Medicine) 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 Yonatan Greenstein, M.D.'s specialty? ▼
Yonatan Greenstein, M.D. specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Newark, New Jersey. Credentials: M.D..
How much does Yonatan Greenstein, M.D. prescribe under Medicare Part D? ▼
In 2023, Yonatan Greenstein, M.D. wrote 93 Medicare Part D claims totaling $56K in drug costs for 28 beneficiaries.
What is Yonatan Greenstein, M.D.'s Medicare quality score? ▼
Yonatan Greenstein, M.D. has a CMS MIPS Final Score of 73.3/100 (Quality: 44.9, Cost: 47.7). 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 Yonatan Greenstein, M.D. located? ▼
Yonatan Greenstein, M.D. is located at 150 BERGEN ST RM I-354, Newark, NJ, 07103. Phone: (973) 972-6111.
What is Yonatan Greenstein, M.D.'s NPI number? ▼
Yonatan Greenstein, M.D.'s National Provider Identifier (NPI) is 1902123458, issued on 04/23/2010.
Does Yonatan Greenstein, M.D. prescribe more brand-name or generic drugs? ▼
Yonatan Greenstein, M.D.'s prescribing is 54% brand-name and 0% generic drugs by claim count, with $28K in brand drug costs.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,646 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,069 Medicare Part D claims per year.
What drugs does Yonatan Greenstein, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Yonatan Greenstein, M.D.'s most frequently prescribed drugs include Albuterol Sulfate Hfa, Symbicort. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Yonatan Greenstein, M.D. accept Medicare? ▼
Yonatan Greenstein, M.D. appears in CMS Medicare data with 93 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Yonatan Greenstein, M.D.'s credentials? ▼
Yonatan Greenstein, M.D.'s NPI is 1902123458 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.