NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1063494706 MD
Verify on CMS → Carl Karoub, MD
Internal Medicine Physician in Royal Oak, 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 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
6K
Medicare Part D claims · 389 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
25.4/100
▼ 58 pts below national avg 83.1 · Below average
Industry payments
$39.38
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Carl Karoub, MD reported a CMS MIPS final score of 25.4/100 - below the 83.1 national average - and filed 6,017 Medicare Part D claims in 2023.
- 25.4/100
- MIPS score · -58 vs avg
- 6K
- 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.
Carl Karoub, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
25 3rd percentile higher than 3% 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 Carl Karoub, 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, Carl Karoub, MD writes more Part D claims than 83% of them and scores higher on MIPS quality than 3% - 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 Carl Karoub, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Carl Karoub, 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 Carl Karoub, MD?
Below national averagePrimary specialty
Internal Medicine Physician
Medicare Part D claims
6,017 122% vs specialty avg
MIPS final score
25.4/100 57.7 pts vs avg
Specialty distribution in Michigan
How Internal Medicine Physician compares to other specialties among Michigan providers
Medicare quality performance, MIPS
Carl Karoub, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 25.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 25.4/100 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).
Carl Karoub, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 4045 W 13 MILE RD, Royal Oak, MI, 48073, with a listed phone of (248) 288-2160. NPI 1063494706 was issued on 11/17/2005.
Medicare Part D records for calendar year 2023 show 6,017 prescription claims written by this provider, covering 389 Medicare beneficiaries and totaling roughly $540K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 6.8%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 25.4/100 for the 2023 performance year (Quality 20, Cost 43), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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 | 1063494706 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/17/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
25.3787
Final Score
Avg: 83.1
20
Quality
43.0297
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 Carl Karoub, MD. Source: openpaymentsdata.cms.gov.
Total received
$39
Largest payer
Mylan Specialty L.P.
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 - 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 Carl Karoub, MD. To verify Carl Karoub, MD'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
Carl Karoub, MD - brand share 13.0%
Internal Medicine Physician average
13% brand-name claims vs 86% generic, on 6,017 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.
6,017
Total Claims
$540K
Total Drug Cost
389
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 11,580
- Total Day Supply
- 332,584
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $407K
- Generic Drug Cost
- $131K
- Opioid Claims
- 407 (6.8% rate)
- Antibiotic Claims
- 245
Patient Demographics
- Average Patient Age
- 80.2 years
- Avg HCC Risk Score
- 1.49
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 18, 65-74: 77, 75-84: 158, 85+: 136
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Carl Karoub, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Rosuvastatin Calcium
Rosuvastatin Calcium
326 claims
- Levothyroxine Sodium
Levothyroxine Sodium
269 claims
- Alprazolam
Alprazolam
248 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
216 claims
- Omeprazole
Omeprazole
180 claims
- Atorvastatin Calcium
Atorvastatin Calcium
163 claims
- Eliquis
Eliquis
158 claims
- Amlodipine Besylate
Amlodipine Besylate
156 claims
| Drug | Claims |
|---|---|
| Rosuvastatin Calcium | 326 |
| Levothyroxine Sodium | 269 |
| Alprazolam | 248 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 216 |
| Omeprazole | 180 |
| Atorvastatin Calcium | 163 |
| Eliquis Apixaban | 158 |
| Amlodipine Besylate | 156 |
| Allopurinol | 141 |
| Lisinopril | 124 |
* 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 Carl Karoub, MD 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
Carl Karoub, MD's 6,017 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Karoub.
Dr. Keith Aaronson
MD
Ann Arbor, MI
Dr. Tomas Abalo
M.D.
Iron Mountain, MI
Dr. Ali Abbas
M.D.
Pontiac, MI
Dr. Hawazin Abbas
MD
Auburn Hills, MI
Dr. Imran Abbasi
D.O.
Warren, MI
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 Michigan 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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Frequently Asked Questions
What is Carl Karoub, MD's specialty? ▼
Carl Karoub, MD specializes in Internal Medicine Physician and practices in Royal Oak, Michigan. Credentials: MD.
How much does Carl Karoub, MD prescribe under Medicare Part D? ▼
In 2023, Carl Karoub, MD wrote 6,017 Medicare Part D claims totaling $540K in drug costs for 389 beneficiaries.
What is Carl Karoub, MD's Medicare quality score? ▼
Carl Karoub, MD has a CMS MIPS Final Score of 25.4/100 (Quality: 20, Cost: 43). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Carl Karoub, MD located? ▼
Carl Karoub, MD is located at 4045 W 13 MILE RD, Royal Oak, MI, 48073. Phone: (248) 288-2160.
What is Carl Karoub, MD's NPI number? ▼
Carl Karoub, MD's National Provider Identifier (NPI) is 1063494706, issued on 11/17/2005.
Does Carl Karoub, MD prescribe more brand-name or generic drugs? ▼
Carl Karoub, MD's prescribing is 13% brand-name and 86% generic drugs by claim count, with $407K in brand drug costs.
Does Carl Karoub, MD prescribe opioids? ▼
Yes, Carl Karoub, MD had 407 opioid claims in 2023 with an opioid prescribing rate of 6.8%.
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 Carl Karoub, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Carl Karoub, MD's most frequently prescribed drugs include Rosuvastatin Calcium, Levothyroxine Sodium, Alprazolam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carl Karoub, MD accept Medicare? ▼
Carl Karoub, MD appears in CMS Medicare data with 6,017 Part D claims and 389 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carl Karoub, MD's credentials? ▼
Carl Karoub, MD's NPI is 1063494706 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
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.