NPI registry status
Active
2026 NPPES data Hospice and Palliative Medicine (Family Medicine) Physician NPI 1821259003 MD
Verify on CMS → Marek Grzeskowiak, MD
Hospice and Palliative Medicine (Family Medicine) Physician in Glenview, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 785 in Hospice and Palliative Medicine (Family 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
133
Medicare Part D claims · 55 beneficiaries · Hospice and Palliative Medicine (Family Medicine) Physician avg: 2K
MIPS score
90.2/100
▲ 7 pts above national avg 83.1 · Exceptional
What the federal data shows
Marek Grzeskowiak, MD reported a CMS MIPS final score of 90.2/100 - above the 83.1 national average - and filed 133 Medicare Part D claims in 2023.
- 90.2/100
- MIPS score · +7 vs avg
- 133
- 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.
Marek Grzeskowiak, MD'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 40% higher than 60% 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 Marek Grzeskowiak, MD sits
This provider among hospice and palliative medicine (family medicine) physician peers
Across the 146 hospice and palliative medicine (family medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Marek Grzeskowiak, MD writes more Part D claims than 23% of them and scores higher on MIPS quality than 57% - 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 hospice and palliative medicine (family medicine) physician peer from a representative sample of 60; the gold marker is Marek Grzeskowiak, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Marek Grzeskowiak, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Marek Grzeskowiak, MD?
High performer (top quartile)Primary specialty
Hospice and Palliative Medicine (Family Medicine) Physician
Medicare Part D claims
133 94% vs specialty avg
MIPS final score
90.2/100 7.1 pts vs avg
Specialty distribution in Illinois
How Hospice and Palliative Medicine (Family Medicine) Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Marek Grzeskowiak, MD's 2023 MIPS final score plotted against the Hospice and Palliative Medicine (Family Medicine) Physician national average
- MIPS Final Score
- 90.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hospice and Palliative Medicine (Family Medicine) Physician) - 90.2/100 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).
Marek Grzeskowiak, MD appears in the CMS NPPES registry as a Hospice and Palliative Medicine (Family Medicine) Physician provider holding MD credentials at 2050 CLAIRE CT, Glenview, IL, 60025, with a listed phone of (847) 556-1707. NPI 1821259003 was issued on 06/20/2008.
Medicare Part D records for calendar year 2023 show 133 prescription claims written by this provider, covering 55 Medicare beneficiaries and totaling roughly $11K in drug spend, with an opioid prescribing rate of 21.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 90.2/100 for the 2023 performance year (Quality 65.4, Cost 80.1), compared with the national average of 83.1.
Hospice and Palliative Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 785 enrolled providers across 51 states and an average of 2,070 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 | 1821259003 |
|---|---|
| Specialty | Hospice and Palliative Medicine (Family Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/20/2008 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
90.1881
Final Score
Avg: 83.1
65.3726
Quality
80.13
Cost
Reporting: Group practice
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Marek Grzeskowiak, MD. To verify Marek Grzeskowiak, MD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois 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.
133
Total Claims
$11K
Total Drug Cost
55
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 179
- Total Day Supply
- 3,980
- Generic Drug Cost
- $2K
- Opioid Claims
- 28 (21.1% rate)
Patient Demographics
- Average Patient Age
- 80.6 years
- Avg HCC Risk Score
- 3.30
- Gender Split
- 51% female / 49% 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 |
|---|---|
| Lorazepam | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hospice and Palliative Medicine (Family Medicine) Physician in IL →
All providers in Illinois →
Compare specialties →
Hospice and Palliative Medicine (Family Medicine) Physician Overview
How Marek Grzeskowiak, MD fits within the Hospice and Palliative Medicine (Family Medicine) Physician landscape nationally.
785
Hospice and Palliative Medicine (Family Medicine) Physician Providers in US
51
States with Hospice and Palliative Medicine (Family Medicine) Physician
2,070
Avg Claims per Provider
Marek Grzeskowiak, MD's 133 claims are below the specialty average of 2,070.
Nearby Hospice and Palliative Medicine (Family Medicine) Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Grzeskowiak.
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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospice and Palliative Medicine (Family 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 Marek Grzeskowiak, MD's specialty? ▼
Marek Grzeskowiak, MD specializes in Hospice and Palliative Medicine (Family Medicine) Physician and practices in Glenview, Illinois. Credentials: MD.
How much does Marek Grzeskowiak, MD prescribe under Medicare Part D? ▼
In 2023, Marek Grzeskowiak, MD wrote 133 Medicare Part D claims totaling $11K in drug costs for 55 beneficiaries.
What is Marek Grzeskowiak, MD's Medicare quality score? ▼
Marek Grzeskowiak, MD has a CMS MIPS Final Score of 90.2/100 (Quality: 65.4, Cost: 80.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Marek Grzeskowiak, MD located? ▼
Marek Grzeskowiak, MD is located at 2050 CLAIRE CT, Glenview, IL, 60025. Phone: (847) 556-1707.
What is Marek Grzeskowiak, MD's NPI number? ▼
Marek Grzeskowiak, MD's National Provider Identifier (NPI) is 1821259003, issued on 06/20/2008.
Does Marek Grzeskowiak, MD prescribe opioids? ▼
Yes, Marek Grzeskowiak, MD had 28 opioid claims in 2023 with an opioid prescribing rate of 21.1%.
How many Hospice and Palliative Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 785 Hospice and Palliative Medicine (Family Medicine) Physician providers across 51 states in the US. The average Hospice and Palliative Medicine (Family Medicine) Physician provider writes 2,070 Medicare Part D claims per year.
What drugs does Marek Grzeskowiak, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Marek Grzeskowiak, MD's most frequently prescribed drugs include Lorazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Marek Grzeskowiak, MD accept Medicare? ▼
Marek Grzeskowiak, MD appears in CMS Medicare data with 133 Part D claims and 55 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marek Grzeskowiak, MD's credentials? ▼
Marek Grzeskowiak, MD's NPI is 1821259003 with credentials MD. 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.