NPI registry status
Active
2026 NPPES data Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician NPI 1508926106 MD PHD
Verify on CMS → Charles Butler, MD PHD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Kalamazoo, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 5,070 in Thoracic Surgery (Cardiothoracic Vascular Surgery) 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
136
Medicare Part D claims · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician avg: 128
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Charles Butler, MD PHD filed 136 Medicare Part D claims in 2023 as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Kalamazoo, Michigan, prescribing 90% generic.
- 136
- Part D claims, 2023
- 90%
- generic prescribing
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.
Charles Butler, MD PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
136 35th percentile higher than 35% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Charles Butler, MD PHD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Charles Butler, MD PHD?
Quality data not reportedPrimary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Medicare Part D claims
136 6% vs specialty avg
Specialty distribution in Michigan
How Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician compares to other specialties among Michigan 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 Thoracic Surgery (Cardiothoracic Vascular Surgery) 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).
Charles Butler, MD PHD appears in the CMS NPPES registry as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider holding MD PHD credentials at 2130 S PARK ST, Kalamazoo, MI, 49001, with a listed phone of (269) 598-6000. NPI 1508926106 was issued on 12/12/2006.
Medicare Part D records for calendar year 2023 show 136 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $73K in drug spend, split 10% brand-name and 90% generic by claim count.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician is a mid-sized specialty nationwide, with 5,070 enrolled providers across 52 states and an average of 128 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 | 1508926106 |
|---|---|
| Specialty | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician |
| Credentials | MD PHD |
| Gender | Male |
| NPI Issued | 12/12/2006 |
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Charles Butler, MD PHD. To verify Charles Butler, MD PHD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Charles Butler, MD PHD - brand share 10.0%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician average
10% brand-name claims vs 90% generic, on 136 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.
136
Total Claims
$73K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 170
- Total Day Supply
- 4,930
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $72K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 78.5 years
- Avg HCC Risk Score
- 2.56
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Butler, MD PHD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Celecoxib
Celecoxib
13 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
13 claims
- Aripiprazole
Aripiprazole
12 claims
- Duloxetine Hcl
Duloxetine Hcl
12 claims
- Gabapentin
Gabapentin
12 claims
- Lansoprazole
Lansoprazole
12 claims
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
12 claims
- Amitriptyline Hcl
Amitriptyline Hcl
11 claims
| Drug | Claims |
|---|---|
| Celecoxib | 13 |
| Rosuvastatin Calcium | 13 |
| Aripiprazole | 12 |
| Duloxetine Hcl | 12 |
| Gabapentin | 12 |
| Lansoprazole | 12 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 12 |
| Amitriptyline Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in MI →
All providers in Michigan →
Compare specialties →
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Overview
How Charles Butler, MD PHD fits within the Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician landscape nationally.
5,070
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in US
52
States with Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
128
Avg Claims per Provider
Charles Butler, MD PHD's 136 claims are above the specialty average of 128.
Nearby Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Butler.
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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Thoracic Surgery (Cardiothoracic Vascular Surgery) 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 Charles Butler, MD PHD's specialty? ▼
Charles Butler, MD PHD specializes in Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician and practices in Kalamazoo, Michigan. Credentials: MD PHD.
How much does Charles Butler, MD PHD prescribe under Medicare Part D? ▼
In 2023, Charles Butler, MD PHD wrote 136 Medicare Part D claims totaling $73K in drug costs for N/A beneficiaries.
Where is Charles Butler, MD PHD located? ▼
Charles Butler, MD PHD is located at 2130 S PARK ST, Kalamazoo, MI, 49001. Phone: (269) 598-6000.
What is Charles Butler, MD PHD's NPI number? ▼
Charles Butler, MD PHD's National Provider Identifier (NPI) is 1508926106, issued on 12/12/2006.
Does Charles Butler, MD PHD prescribe more brand-name or generic drugs? ▼
Charles Butler, MD PHD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $72K in brand drug costs.
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers are there in the US? ▼
There are 5,070 Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers across 52 states in the US. The average Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider writes 128 Medicare Part D claims per year.
What drugs does Charles Butler, MD PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Butler, MD PHD's most frequently prescribed drugs include Celecoxib, Rosuvastatin Calcium, Aripiprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Butler, MD PHD accept Medicare? ▼
Charles Butler, MD PHD appears in CMS Medicare data with 136 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Butler, MD PHD's credentials? ▼
Charles Butler, MD PHD's NPI is 1508926106 with credentials MD PHD. 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
Compiled from official public sources by the PlainDoctor editorial team.
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.