NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1720425416 M.D.
Verify on CMS → Charles Clark, M.D.
Internal Medicine Physician in Metairie, Louisiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 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
3K
Medicare Part D claims · 490 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.6/100
▼ 10 pts below national avg 83.5 · Mid-tier
Industry payments
$124.52
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Charles Clark, M.D. reported a CMS MIPS final score of 73.6/100 - below the 83.5 national average - and filed 2,913 Medicare Part D claims in 2023.
- 73.6/100
- MIPS score · -10 vs avg
- 3K
- Part D claims, 2023
- 88%
- 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.
CMS NPPES provider registry desk
NPI 1720425416 · Internal Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-BELOW · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1720425416
- ENUM-MID 2013
- TAX-MEGA 173K Internal Medicine
- MIPS-BELOW 73.6/100
- RX-MID 2,913
- BOOK-LIGHT 1,841 in Louisiana
- PHOTO-FINISH Wilfredo Abesamis · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Clark · this pro…
Clark · this provider
73.6 MIPS pts
- Mary Alexander ·…
Mary Alexander
73.6 MIPS pts
- Wilfredo Abesami…
Wilfredo Abesamis
73.6 MIPS pts
- Mohamed Abu-Qaou…
Mohamed Abu-Qaoud
73.6 MIPS pts
- Emelya Ahadian ·…
Emelya Ahadian
73.6 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Charles Clark, M.D.'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.
74 ≥ 11th percentile 11% 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 Charles Clark, M.D. sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Charles Clark, M.D. writes more Part D claims than 72% of them and scores higher on MIPS quality than 12% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Charles Clark, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Charles Clark, M.D. 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 Clark, M.D.?
Below national averagePrimary specialty
Internal Medicine Physician
Medicare Part D claims
2,913 7% vs specialty avg
MIPS final score
73.6/100 9.9 pts vs avg
Specialty distribution in Louisiana
How Internal Medicine Physician compares to other specialties among Louisiana providers
Medicare quality performance, MIPS
Charles Clark, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 73.6/100
- 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 | 1720425416 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/04/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.6207
Final Score
Measured-score avg: 83.5
74.5653
Quality
58.6993
Cost
Reporting: Group practice
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 Clark, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$125
Largest payer
Mallinckrodt Hospital Products 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.
Brand vs generic prescribing mix · Typical
Charles Clark, M.D. - brand share 11.0%
Internal Medicine Physician average
11% brand-name claims vs 88% generic, on 2,913 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.
2,913
Total Claims
$322K
Total Drug Cost
490
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,016
- Total Day Supply
- 205,046
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $258K
- Generic Drug Cost
- $62K
- Opioid Claims
- 17 (0.6% rate)
- Antibiotic Claims
- 61
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 38, 65-74: 227, 75-84: 166, 85+: 59
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Clark, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
272 claims
- Amlodipine Besylate
Amlodipine Besylate
139 claims
- Metformin Hcl
Metformin Hcl
138 claims
- Losartan Potassium
Losartan Potassium
115 claims
- Lisinopril 94
Lisinopril
94 claims
- Tamsulosin Hcl 66
Tamsulosin Hcl
66 claims
- Levothyroxine Sodium 59
Levothyroxine Sodium
59 claims
- Omeprazole 58
Omeprazole
58 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 272 |
| Amlodipine Besylate | 139 |
| Metformin Hcl | 138 |
| Losartan Potassium | 115 |
| Lisinopril | 94 |
| Tamsulosin Hcl | 66 |
| Levothyroxine Sodium | 59 |
| Omeprazole | 58 |
| Metoprolol Tartrate | 57 |
| Losartan-Hydrochlorothiazide Losartan/Hydrochlorothiazide | 54 |
* 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 Clark, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Charles Clark, M.D.'s 2,913 claims are above the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Clark, both outside Louisiana so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (73.6 here).
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Louisiana
Other clinicians with the same primary specialty enrolled in Louisiana, drawn from the same CMS NPPES roster as Clark.
One of 1,841 Internal Medicine Physician providers enrolled in Louisiana, 5 are shown here.
Dr. Alfred Abaunza
M.D.
New Orleans, LA
Mokhtar Abdallah
Baton Rouge, LA
Dr. David Abdehou
MD
Shreveport, LA
Dr. Mazin Abdelghany
MD
Covington, LA
Dr. Youssef Abdelmalek
M.D
Alexandria, LA
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Charles Clark, M.D.'s specialty? ▼
Charles Clark, M.D. specializes in Internal Medicine Physician and practices in Metairie, Louisiana. Credentials: M.D..
How much does Charles Clark, M.D. prescribe under Medicare Part D? ▼
In 2023, Charles Clark, M.D. wrote 2,913 Medicare Part D claims totaling $322K in drug costs for 490 beneficiaries.
What is Charles Clark, M.D.'s Medicare quality score? ▼
Charles Clark, M.D. has a CMS MIPS Final Score of 73.6/100 (Quality: 74.6, Cost: 58.7). 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 Charles Clark, M.D. located? ▼
Charles Clark, M.D. is located at 3530 HOUMA BLVD STE 300, Metairie, LA, 70006. Phone: (504) 264-5142.
What is Charles Clark, M.D.'s NPI number? ▼
Charles Clark, M.D.'s National Provider Identifier (NPI) is 1720425416, issued on 06/04/2013.
Does Charles Clark, M.D. prescribe more brand-name or generic drugs? ▼
Charles Clark, M.D.'s prescribing is 11% brand-name and 88% generic drugs by claim count, with $258K in brand drug costs.
Does Charles Clark, M.D. prescribe opioids? ▼
Yes, Charles Clark, M.D. had 17 opioid claims in 2023 with an opioid prescribing rate of 0.6%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Clark, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Clark, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Clark, M.D. accept Medicare? ▼
Charles Clark, M.D. appears in CMS Medicare data with 2,913 Part D claims and 490 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Clark, M.D.'s credentials? ▼
Charles Clark, M.D.'s NPI is 1720425416 with credentials M.D.. 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.