NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1255447421 MD
Verify on CMS → Ndudi Aniemeka, MD
Internal Medicine 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 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
13K
Medicare Part D claims · 305 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
79%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.6/100
▲ 14 pts above national avg 83.1 · Exceptional
Industry payments
$2.3K
101 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
Ndudi Aniemeka, MD reported a CMS MIPS final score of 96.6/100 - above the 83.1 national average - and filed 13,353 Medicare Part D claims in 2023.
- 96.6/100
- MIPS score · +14 vs avg
- 13K
- Part D claims, 2023
- 79%
- 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.
Ndudi Aniemeka, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
97 Top 17% higher than 83% 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 Ndudi Aniemeka, 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, Ndudi Aniemeka, MD writes more Part D claims than 96% of them and scores higher on MIPS quality than 84% - placing this provider in the high-volume, high-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 Ndudi Aniemeka, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ndudi Aniemeka, 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 Ndudi Aniemeka, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
13,353 392% vs specialty avg
MIPS final score
96.6/100 13.5 pts vs avg
Specialty distribution in Illinois
How Internal Medicine Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Ndudi Aniemeka, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 96.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 96.6/100 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).
Ndudi Aniemeka, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 5219 W MADISON ST, Chicago, IL, 60644, with a listed phone of (773) 378-4823. NPI 1255447421 was issued on 08/21/2006.
Medicare Part D records for calendar year 2023 show 13,353 prescription claims written by this provider, covering 305 Medicare beneficiaries and totaling roughly $2.4 million in drug spend, split 20% brand-name and 79% generic by claim count, with an opioid prescribing rate of 2.6%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 96.6/100 for the 2023 performance year (Quality 100, Cost 55.4), 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 | 1255447421 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/21/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.6206
Final Score
Avg: 83.1
100
Quality
55.402
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 Ndudi Aniemeka, MD. Source: openpaymentsdata.cms.gov.
Total received
$2.3K
Largest payer
Teva Pharmaceuticals USA, 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 - 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 Ndudi Aniemeka, MD. To verify Ndudi Aniemeka, MD'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.
Brand vs generic prescribing mix · Typical
Ndudi Aniemeka, MD - brand share 20.0%
Internal Medicine Physician average
20% brand-name claims vs 79% generic, on 13,353 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.
13,353
Total Claims
$2.4M
Total Drug Cost
305
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 17,517
- Total Day Supply
- 479,356
- Brand vs Generic
- 20% brand / 79% generic
- Brand Drug Cost
- $2.1M
- Generic Drug Cost
- $361K
- Opioid Claims
- 352 (2.6% rate)
- Antibiotic Claims
- 166
Patient Demographics
- Average Patient Age
- 64.1 years
- Avg HCC Risk Score
- 2.06
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 121, 65-74: 110, 75-84: 55, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ndudi Aniemeka, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
1,088 claims
- Amlodipine Besylate
Amlodipine Besylate
542 claims
- Metoprolol Succinate 406
Metoprolol Succinate
406 claims
- Levothyroxine Sodium 366
Levothyroxine Sodium
366 claims
- Divalproex Sodium 259
Divalproex Sodium
259 claims
- Pantoprazole Sodium 238
Pantoprazole Sodium
238 claims
- Tamsulosin Hcl 218
Tamsulosin Hcl
218 claims
- Vascepa 213
Vascepa
213 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 1,088 |
| Amlodipine Besylate | 542 |
| Metoprolol Succinate | 406 |
| Levothyroxine Sodium | 366 |
| Divalproex Sodium | 259 |
| Pantoprazole Sodium | 238 |
| Tamsulosin Hcl | 218 |
| Vascepa Icosapent Ethyl | 213 |
| Metformin Hcl Er Metformin Hcl | 211 |
| Metformin Hcl | 206 |
* 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 Ndudi Aniemeka, 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
Ndudi Aniemeka, MD's 13,353 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Aniemeka.
Dr. Hasan Abad
D.O.
Chicago, IL
Dr. Peter Abadeer
D.O.
Bloomington, IL
Dr. Pamela Abadi
D.O.
Winfield, IL
Dr. Motaz Abas
MD
Peoria, IL
Dr. Estefania Abasolo Lopez
MD
Chicago, IL
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 Illinois 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 Ndudi Aniemeka, MD's specialty? ▼
Ndudi Aniemeka, MD specializes in Internal Medicine Physician and practices in Chicago, Illinois. Credentials: MD.
How much does Ndudi Aniemeka, MD prescribe under Medicare Part D? ▼
In 2023, Ndudi Aniemeka, MD wrote 13,353 Medicare Part D claims totaling $2.4M in drug costs for 305 beneficiaries.
What is Ndudi Aniemeka, MD's Medicare quality score? ▼
Ndudi Aniemeka, MD has a CMS MIPS Final Score of 96.6/100 (Quality: 100, Cost: 55.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ndudi Aniemeka, MD located? ▼
Ndudi Aniemeka, MD is located at 5219 W MADISON ST, Chicago, IL, 60644. Phone: (773) 378-4823.
What is Ndudi Aniemeka, MD's NPI number? ▼
Ndudi Aniemeka, MD's National Provider Identifier (NPI) is 1255447421, issued on 08/21/2006.
Does Ndudi Aniemeka, MD prescribe more brand-name or generic drugs? ▼
Ndudi Aniemeka, MD's prescribing is 20% brand-name and 79% generic drugs by claim count, with $2.1M in brand drug costs.
Does Ndudi Aniemeka, MD prescribe opioids? ▼
Yes, Ndudi Aniemeka, MD had 352 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
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 Ndudi Aniemeka, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ndudi Aniemeka, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ndudi Aniemeka, MD accept Medicare? ▼
Ndudi Aniemeka, MD appears in CMS Medicare data with 13,353 Part D claims and 305 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ndudi Aniemeka, MD's credentials? ▼
Ndudi Aniemeka, MD's NPI is 1255447421 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.
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.