NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1104835628 MD
Verify on CMS → Charles Ahner, MD
Internal Medicine Physician in Palm Beach Gardens, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in 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
5K
Medicare Part D claims · 628 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
9.9/100
▼ 73 pts below national avg 83.1 · Penalty band
Industry payments
$313.17
15 payments · CMS Open Payments (Sunshine Act)
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 Ahner, MD reported a CMS MIPS final score of 9.9/100 - below the 83.1 national average - and filed 4,862 Medicare Part D claims in 2023.
- 9.9/100
- MIPS score · -73 vs avg
- 5K
- Part D claims, 2023
- 86%
- 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.
Charles Ahner, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
10 2nd percentile higher than 2% 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 Charles Ahner, MD sits
This provider among internal medicine physician peers
Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Charles Ahner, MD writes more Part D claims than 80% of them and scores higher on MIPS quality than 1% - placing this provider in the high-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 internal medicine physician peer from a representative sample of 60; the gold marker is Charles Ahner, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Charles Ahner, 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 Charles Ahner, MD?
Below national averagePrimary specialty
Internal Medicine Physician
Medicare Part D claims
4,862 79% vs specialty avg
MIPS final score
9.9/100 73.2 pts vs avg
Specialty distribution in Florida
How Internal Medicine Physician compares to other specialties among Florida providers
Medicare quality performance, MIPS
Charles Ahner, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 9.9/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 9.9/100 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).
Charles Ahner, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 10333 N MILITARY TRAIL, Palm Beach Gardens, FL, 33410, with a listed phone of (561) 630-3696. NPI 1104835628 was issued on 08/05/2006.
Medicare Part D records for calendar year 2023 show 4,862 prescription claims written by this provider, covering 628 Medicare beneficiaries and totaling roughly $348K in drug spend, split 11% brand-name and 86% generic by claim count, with an opioid prescribing rate of 0.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 9.9/100 for the 2023 performance year (Quality 0, Cost 32.9), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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 | 1104835628 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/05/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
9.8592
Final Score
Avg: 83.1
0
Quality
32.8641
Cost
Reporting: Individual
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 Charles Ahner, MD. Source: openpaymentsdata.cms.gov.
Total received
$313
Largest payer
Eisai Inc.
Most common payment type
Food and Beverage
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 - Florida FLDOH 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 ~75K Florida medical licensees in 2023 - they are NOT specific to Charles Ahner, MD. To verify Charles Ahner, MD's current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases
FLDOH 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 Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Charles Ahner, MD - brand share 11.0%
Internal Medicine Physician average
11% brand-name claims vs 86% generic, on 4,862 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.
4,862
Total Claims
$348K
Total Drug Cost
628
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 9,666
- Total Day Supply
- 278,300
- Brand vs Generic
- 11% brand / 86% generic
- Brand Drug Cost
- $243K
- Generic Drug Cost
- $94K
- Opioid Claims
- 15 (0.3% rate)
- Antibiotic Claims
- 258
Patient Demographics
- Average Patient Age
- 74.1 years
- Avg HCC Risk Score
- 0.85
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 26, 65-74: 308, 75-84: 239, 85+: 55
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Ahner, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
259 claims
- Losartan Potassium
Losartan Potassium
188 claims
- Amlodipine Besylate
Amlodipine Besylate
179 claims
- Alprazolam
Alprazolam
147 claims
- Anastrozole
Anastrozole
132 claims
- Lisinopril
Lisinopril
131 claims
- Testosterone Cypio…
Testosterone Cypionate
114 claims
- Sertraline Hcl 93
Sertraline Hcl
93 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 259 |
| Losartan Potassium | 188 |
| Amlodipine Besylate | 179 |
| Alprazolam | 147 |
| Anastrozole | 132 |
| Lisinopril | 131 |
| Testosterone Cypionate | 114 |
| Sertraline Hcl | 93 |
| Rosuvastatin Calcium | 90 |
| Azithromycin | 87 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Charles Ahner, MD fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Charles Ahner, MD's 4,862 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Ahner.
Dr. Hayden Aaron
M.D.
West Palm Beach, FL
Dr. Abiedu Abaaba
M.D.
Jacksonville, FL
Dr. Kashif Abad
M.D.
West Palm Beach, FL
Dr. Jose Abando
MD
Daytona Beach, FL
Dr. Ismeth Abbas
M.D.
Jacksonville, FL
Compare Internal Medicine 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 Florida medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby 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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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 Charles Ahner, MD's specialty? ▼
Charles Ahner, MD specializes in Internal Medicine Physician and practices in Palm Beach Gardens, Florida. Credentials: MD.
How much does Charles Ahner, MD prescribe under Medicare Part D? ▼
In 2023, Charles Ahner, MD wrote 4,862 Medicare Part D claims totaling $348K in drug costs for 628 beneficiaries.
What is Charles Ahner, MD's Medicare quality score? ▼
Charles Ahner, MD has a CMS MIPS Final Score of 9.9/100 (Quality: 0, Cost: 32.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Charles Ahner, MD located? ▼
Charles Ahner, MD is located at 10333 N MILITARY TRAIL, Palm Beach Gardens, FL, 33410. Phone: (561) 630-3696.
What is Charles Ahner, MD's NPI number? ▼
Charles Ahner, MD's National Provider Identifier (NPI) is 1104835628, issued on 08/05/2006.
Does Charles Ahner, MD prescribe more brand-name or generic drugs? ▼
Charles Ahner, MD's prescribing is 11% brand-name and 86% generic drugs by claim count, with $243K in brand drug costs.
Does Charles Ahner, MD prescribe opioids? ▼
Yes, Charles Ahner, MD had 15 opioid claims in 2023 with an opioid prescribing rate of 0.3%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Charles Ahner, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Ahner, MD's most frequently prescribed drugs include Levothyroxine Sodium, Losartan Potassium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Ahner, MD accept Medicare? ▼
Charles Ahner, MD appears in CMS Medicare data with 4,862 Part D claims and 628 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Ahner, MD's credentials? ▼
Charles Ahner, MD's NPI is 1104835628 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
Compiled from official public sources by the PlainDoctor editorial team.