NPI registry status
Active
2026 NPPES data Transplant Hepatology Physician NPI 1821064692
Verify on CMS → Michael Charlton
Transplant Hepatology Physician in Chicago, 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 151 in Transplant Hepatology 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
513
Medicare Part D claims · 65 beneficiaries · Transplant Hepatology Physician avg: 553
MIPS score
97.7/100
▲ 14 pts above national avg 83.5 · Exceptional
Industry payments
$44.8K
12 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Michael Charlton reported a CMS MIPS final score of 97.7/100 - above the 83.5 national average - and filed 513 Medicare Part D claims in 2024.
- 97.7/100
- MIPS score · +14 vs avg
- 513
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥84th
- 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.
Federal trust snapshot
What official records show about Michael Charlton
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1821064692), first enumerated 02/23/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 513 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 97.7/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Industry payment transparency
$44.8K in reported industry payments (12 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Michael Charlton's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1821064692 · Transplant Hepatology Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · MIPS-ELITE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH
- NPI-10 1821064692
- ENUM-LEGACY 2006
- TAX-TRACE 151
- MIPS-ELITE 97.7/100
- RX-LIGHT 513
- BOOK-THIN 8 in Illinois
- PHOTO-FINISH Geoffrey Block, MD · ±0.1
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Anita Pai, MD · …
Anita Pai, MD
97.1 MIPS pts
- Geoffrey Block, …
Geoffrey Block, MD
97.6 MIPS pts
- Haripriya Maddur…
Haripriya Maddur, MD
97.6 MIPS pts
- Charlton · this …
Charlton · this provider
97.7 MIPS pts
- Henry Lin, MD · …
Henry Lin, MD
97.8 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Michael Charlton'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.
98 ≥ 84th percentile 84% 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 Michael Charlton sits
This provider among transplant hepatology physician peers
Across the 56 transplant hepatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Michael Charlton writes more Part D claims than 55% of them and scores higher on MIPS quality than 73% - 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 transplant hepatology physician peer from a representative sample of 55; the gold marker is Michael Charlton. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Michael Charlton 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 Michael Charlton?
High performer (top quartile)Primary specialty
Transplant Hepatology Physician
Medicare Part D claims
513 7% vs specialty avg
MIPS final score
97.7/100 14.2 pts vs avg
Specialty distribution in Illinois
How Transplant Hepatology Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Michael Charlton's 2023 MIPS final score plotted against the Transplant Hepatology Physician national average
- MIPS Final Score
- 97.7/100
- 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 | 1821064692 |
|---|---|
| Specialty | Transplant Hepatology Physician |
| Gender | Male |
| NPI Issued | 02/23/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
97.7188
Final Score
Measured-score avg: 83.5
75.4375
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
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 Michael Charlton. Source: openpaymentsdata.cms.gov.
Total received
$44.8K
Largest payer
Madrigal Pharmaceuticals
Most common payment type
Consulting Fee
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.
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 Michael Charlton. To verify Michael Charlton'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 2024.
513
Total Claims
$299K
Total Drug Cost
65
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 799.533
- Total Day Supply
- 23,295
- Generic Drug Cost
- $19K
- Antibiotic Claims
- 60
Patient Demographics
- Average Patient Age
- 66.4 years
- Avg HCC Risk Score
- 2.72
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 21, 65-74: 30, 75-84: 14, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Michael Charlton prescribes most
Top Medicare Part D drugs by claim count, 2024
- Xifaxan
Xifaxan
59 claims
- Mycophenolate Mofe…
Mycophenolate Mofetil
37 claims
- Furosemide
Furosemide
31 claims
- Ursodiol
Ursodiol
29 claims
- Azathioprine
Azathioprine
28 claims
- Ozempic
Ozempic
28 claims
- Lactulose 22
Lactulose
22 claims
- Tacrolimus 22
Tacrolimus
22 claims
| Drug | Claims |
|---|---|
| Xifaxan Rifaximin | 59 |
| Mycophenolate Mofetil | 37 |
| Furosemide | 31 |
| Ursodiol | 29 |
| Azathioprine | 28 |
| Ozempic Semaglutide | 28 |
| Lactulose | 22 |
| Tacrolimus | 22 |
| Spironolactone | 21 |
| Alendronate Sodium | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Transplant Hepatology Physician Overview
How Michael Charlton fits within the Transplant Hepatology Physician landscape nationally.
151
Transplant Hepatology Physician Providers in US
36
States with Transplant Hepatology Physician
553
Avg Claims per Provider
Michael Charlton's 513 claims are below the specialty average of 553.
Nationwide Transplant Hepatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Charlton, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (97.7 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Transplant Hepatology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Charlton.
One of 8 Transplant Hepatology Physician providers enrolled in Illinois, 5 are shown here.
Andrew Aronsohn
Chicago, IL
Dr. Maria El Gemayel
MD
Chicago, IL
Dharani Guttikonda
Chicago, IL
Nisha Howarth
Chicago, IL
Dr. Krystina Johnson
MD
Chicago, IL
Compare Transplant Hepatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michael Charlton's specialty? ▼
Michael Charlton specializes in Transplant Hepatology Physician and practices in Chicago, Illinois.
How much does Michael Charlton prescribe under Medicare Part D? ▼
In 2024, Michael Charlton wrote 513 Medicare Part D claims totaling $299K in drug costs for 65 beneficiaries.
What is Michael Charlton's Medicare quality score? ▼
Michael Charlton has a CMS MIPS Final Score of 97.7/100 (Quality: 75.4). 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 Michael Charlton located? ▼
Michael Charlton is located at 5841 S MARYLAND AVE, Chicago, IL, 60637. Phone: (888) 824-0200.
What is Michael Charlton's NPI number? ▼
Michael Charlton's National Provider Identifier (NPI) is 1821064692, issued on 02/23/2006.
How many Transplant Hepatology Physician providers are there in the US? ▼
There are 151 Transplant Hepatology Physician providers across 36 states in the US. The average Transplant Hepatology Physician provider writes 553 Medicare Part D claims per year.
What drugs does Michael Charlton prescribe most often? ▼
Based on 2024 Medicare Part D data, Michael Charlton's most frequently prescribed drugs include Xifaxan, Mycophenolate Mofetil, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Charlton accept Medicare? ▼
Michael Charlton appears in CMS Medicare data with 513 Part D claims and 65 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Charlton's credentials? ▼
Michael Charlton's NPI is 1821064692. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.