NPI registry status
Active
2026 NPPES data Orthopaedic Trauma Physician NPI 1679520944 MD
Verify on CMS → Michael Chardack, MD
Orthopaedic Trauma Physician in Eau Claire, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 717 in Orthopaedic Trauma 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
26
Medicare Part D claims · 17 beneficiaries · Orthopaedic Trauma Physician avg: 160
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Michael Chardack, MD filed 26 Medicare Part D claims in 2023 as an Orthopaedic Trauma Physician in Eau Claire, Wisconsin.
- 26
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥0th
- pct by Part D claim volume (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.
Michael Chardack, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
26 ≥ 0th percentile 0% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Michael Chardack, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Michael Chardack, MD?
Quality data not reportedPrimary specialty
Orthopaedic Trauma Physician
Medicare Part D claims
26 84% vs specialty avg
Specialty distribution in Wisconsin
How Orthopaedic Trauma Physician compares to other specialties among Wisconsin providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Orthopaedic Trauma Physician. Verify directly:
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).
Michael Chardack, MD appears in the CMS NPPES registry as an Orthopaedic Trauma Physician provider holding MD credentials at 617 W CLAIREMONT AVE, Eau Claire, WI, 54701, with a listed phone of (920) 496-4700. NPI 1679520944 was issued on 05/30/2006.
Medicare Part D records for calendar year 2023 show 26 prescription claims written by this provider, covering 17 Medicare beneficiaries and totaling roughly $978 in drug spend, with an opioid prescribing rate of 50.0%.
Orthopaedic Trauma Physician is a narrow specialty nationwide, with 717 enrolled providers across 51 states and an average of 160 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 | 1679520944 |
|---|---|
| Specialty | Orthopaedic Trauma Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/30/2006 |
Hospital and facility affiliations
Facilities where Michael Chardack, MD 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.
Mercy Clinic Trauma And General Surgery LLC
Saint Louis, MO
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
26
Total Claims
$978
Total Drug Cost
17
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 26
- Total Day Supply
- 273
- Brand Drug Cost
- $0
- Generic Drug Cost
- $978
- Opioid Claims
- 13 (50.0% rate)
Patient Demographics
- Average Patient Age
- 73.4 years
- Avg HCC Risk Score
- 2.10
Orthopaedic Trauma Physician Overview
How Michael Chardack, MD fits within the Orthopaedic Trauma Physician landscape nationally.
717
Orthopaedic Trauma Physician Providers in US
51
States with Orthopaedic Trauma Physician
160
Avg Claims per Provider
Michael Chardack, MD's 26 claims are below the specialty average of 160.
Nearby Orthopaedic Trauma Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Chardack.
Dr. Jacquelyn Dunahoe
MD
Madison, WI
Dr. Matthew Ryba
PA-C
Eau Claire, WI
Dr. Gregory Schmeling
MD
Milwaukee, WI
Compare Orthopaedic Trauma 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Orthopaedic Trauma 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Michael Chardack, MD's specialty? ▼
Michael Chardack, MD specializes in Orthopaedic Trauma Physician and practices in Eau Claire, Wisconsin. Credentials: MD.
How much does Michael Chardack, MD prescribe under Medicare Part D? ▼
In 2023, Michael Chardack, MD wrote 26 Medicare Part D claims totaling $978 in drug costs for 17 beneficiaries.
Where is Michael Chardack, MD located? ▼
Michael Chardack, MD is located at 617 W CLAIREMONT AVE, Eau Claire, WI, 54701. Phone: (920) 496-4700.
What is Michael Chardack, MD's NPI number? ▼
Michael Chardack, MD's National Provider Identifier (NPI) is 1679520944, issued on 05/30/2006.
Does Michael Chardack, MD prescribe opioids? ▼
Yes, Michael Chardack, MD had 13 opioid claims in 2023 with an opioid prescribing rate of 50.0%.
How many Orthopaedic Trauma Physician providers are there in the US? ▼
There are 717 Orthopaedic Trauma Physician providers across 51 states in the US. The average Orthopaedic Trauma Physician provider writes 160 Medicare Part D claims per year.
Does Michael Chardack, MD accept Medicare? ▼
Michael Chardack, MD appears in CMS Medicare data with 26 Part D claims and 17 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Chardack, MD's credentials? ▼
Michael Chardack, MD's NPI is 1679520944 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.
- 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.