NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1619946936 MD
Verify on CMS → James Demarco, MD
Nephrology Physician in Bridgeport, West Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,534 in Nephrology 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
874
Medicare Part D claims · 130 beneficiaries · Nephrology Physician avg: 1K
MIPS score
55.5/100
▼ 28 pts below national avg 83.1 · Mid-tier
Industry payments
$74.95
4 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
James Demarco, MD reported a CMS MIPS final score of 55.5/100 - below the 83.1 national average - and filed 874 Medicare Part D claims in 2023.
- 55.5/100
- MIPS score · -28 vs avg
- 874
- Part D claims, 2023
- 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.
James Demarco, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
56 5th percentile higher than 5% 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 James Demarco, MD sits
This provider among nephrology physician peers
Across the 2,476 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, James Demarco, MD writes more Part D claims than 41% of them and scores higher on MIPS quality than 15% - placing this provider in the lower-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 nephrology physician peer from a representative sample of 60; the gold marker is James Demarco, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
James Demarco, 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 James Demarco, MD?
Below national averagePrimary specialty
Nephrology Physician
Medicare Part D claims
874 40% vs specialty avg
MIPS final score
55.5/100 27.6 pts vs avg
Specialty distribution in West Virginia
How Nephrology Physician compares to other specialties among West Virginia providers
Medicare quality performance, MIPS
James Demarco, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 55.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Nephrology Physician) - 55.5/100 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).
James Demarco, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 1370 JOHNSON AVE, Bridgeport, WV, 26330, with a listed phone of (304) 622-5196. NPI 1619946936 was issued on 03/17/2006.
Medicare Part D records for calendar year 2023 show 874 prescription claims written by this provider, covering 130 Medicare beneficiaries and totaling roughly $217K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 55.5/100 for the 2023 performance year (Quality 75.3, Cost 57.1), compared with the national average of 83.1.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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 | 1619946936 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/17/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
55.5064
Final Score
Avg: 83.1
75.281
Quality
57.1477
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 James Demarco, MD. Source: openpaymentsdata.cms.gov.
Total received
$75
Largest payer
AKEBIA THERAPEUTICS 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
874
Total Claims
$217K
Total Drug Cost
130
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,469
- Total Day Supply
- 42,026
- Generic Drug Cost
- $55K
- Antibiotic Claims
- 47
Patient Demographics
- Average Patient Age
- 70.7 years
- Avg HCC Risk Score
- 6.42
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 35, 65-74: 40, 75-84: 40, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James Demarco, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sevelamer Carbonate
Sevelamer Carbonate
118 claims
- Auryxia 43
Auryxia
43 claims
- Allopurinol 39
Allopurinol
39 claims
- Gentamicin Sulfate 38
Gentamicin Sulfate
38 claims
- Alprazolam 23
Alprazolam
23 claims
- Calcium Acetate 23
Calcium Acetate
23 claims
- Veltassa 20
Veltassa
20 claims
- Zolpidem Tartrate 19
Zolpidem Tartrate
19 claims
| Drug | Claims |
|---|---|
| Sevelamer Carbonate | 118 |
| Auryxia Ferric Citrate | 43 |
| Allopurinol | 39 |
| Gentamicin Sulfate | 38 |
| Alprazolam | 23 |
| Calcium Acetate | 23 |
| Veltassa Patiromer Calcium Sorbitex | 20 |
| Zolpidem Tartrate | 19 |
| Amlodipine Besylate | 18 |
| Furosemide | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How James Demarco, MD fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
James Demarco, MD's 874 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in West Virginia
Other clinicians with the same primary specialty enrolled in West Virginia, drawn from the same CMS NPPES roster as Demarco.
Dr. Marilyn Aday
M.D.
Bridgeport, WV
Dr. Jeffery Addison
MD
Charleston, WV
Agura Afiari
South Charleston, WV
Dr. Adeem Akbar
M.D.
Morgantown, WV
Dr. Robin Arora
M.D.
Huntington, WV
Compare Nephrology 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 West Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
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How insurance networks affect your costs
Telehealth Guide
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Explore West Virginia
Frequently Asked Questions
What is James Demarco, MD's specialty? ▼
James Demarco, MD specializes in Nephrology Physician and practices in Bridgeport, West Virginia. Credentials: MD.
How much does James Demarco, MD prescribe under Medicare Part D? ▼
In 2023, James Demarco, MD wrote 874 Medicare Part D claims totaling $217K in drug costs for 130 beneficiaries.
What is James Demarco, MD's Medicare quality score? ▼
James Demarco, MD has a CMS MIPS Final Score of 55.5/100 (Quality: 75.3, Cost: 57.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is James Demarco, MD located? ▼
James Demarco, MD is located at 1370 JOHNSON AVE, Bridgeport, WV, 26330. Phone: (304) 622-5196.
What is James Demarco, MD's NPI number? ▼
James Demarco, MD's National Provider Identifier (NPI) is 1619946936, issued on 03/17/2006.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does James Demarco, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, James Demarco, MD's most frequently prescribed drugs include Sevelamer Carbonate, Auryxia, Allopurinol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Demarco, MD accept Medicare? ▼
James Demarco, MD appears in CMS Medicare data with 874 Part D claims and 130 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Demarco, MD's credentials? ▼
James Demarco, MD's NPI is 1619946936 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.