NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1922081447 MD
Verify on CMS → Charles McCoy, MD
Nephrology Physician in East Providence, Rhode Island.
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
248
Medicare Part D claims · 76 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
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 McCoy, MD filed 248 Medicare Part D claims in 2023 as a Nephrology Physician in East Providence, Rhode Island, prescribing 95% generic.
- 248
- Part D claims, 2023
- 95%
- generic prescribing
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 McCoy, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
248 49th percentile higher than 49% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Charles McCoy, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Charles McCoy, MD?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
248 83% vs specialty avg
Specialty distribution in Rhode Island
How Nephrology Physician compares to other specialties among Rhode Island providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nephrology Physician. Verify directly:
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 McCoy, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 318 WATERMAN AVE, East Providence, RI, 02914, with a listed phone of (401) 438-5950. NPI 1922081447 was issued on 11/29/2005.
Medicare Part D records for calendar year 2023 show 248 prescription claims written by this provider, covering 76 Medicare beneficiaries and totaling roughly $6K in drug spend, split 5% brand-name and 95% generic by claim count.
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 | 1922081447 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/29/2005 |
Brand vs generic prescribing mix · Generic-heavy
Charles McCoy, MD - brand share 5.0%
Nephrology Physician average
5% brand-name claims vs 95% generic, on 248 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.
248
Total Claims
$6K
Total Drug Cost
76
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 654
- Total Day Supply
- 19,534
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $819
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 75.0 years
- Avg HCC Risk Score
- 2.66
- Gender Split
- 53% female / 47% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles McCoy, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
34 claims
- Losartan Potassium
Losartan Potassium
31 claims
- Lisinopril
Lisinopril
16 claims
- Bumetanide
Bumetanide
14 claims
- Metoprolol Tartrate 13
Metoprolol Tartrate
13 claims
- Allopurinol 12
Allopurinol
12 claims
- Hydrochlorothiazide 11
Hydrochlorothiazide
11 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 34 |
| Losartan Potassium | 31 |
| Lisinopril | 16 |
| Bumetanide | 14 |
| Metoprolol Tartrate | 13 |
| Allopurinol | 12 |
| Hydrochlorothiazide | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Charles McCoy, 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
Charles McCoy, MD's 248 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Rhode Island
Other clinicians with the same primary specialty enrolled in Rhode Island, drawn from the same CMS NPPES roster as McCoy.
Dr. J Gary Abuelo
MD
Riverside, RI
Dr. Rasha Alawieh
MD
Providence, RI
Dr. Maroun Azar
M.D.
Warwick, RI
Dr. Keith Bartolomei
M.D.
Providence, RI
Dr. George Bayliss
M.D.
Riverside, RI
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 Rhode Island 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Rhode Island
Frequently Asked Questions
What is Charles McCoy, MD's specialty? ▼
Charles McCoy, MD specializes in Nephrology Physician and practices in East Providence, Rhode Island. Credentials: MD.
How much does Charles McCoy, MD prescribe under Medicare Part D? ▼
In 2023, Charles McCoy, MD wrote 248 Medicare Part D claims totaling $6K in drug costs for 76 beneficiaries.
Where is Charles McCoy, MD located? ▼
Charles McCoy, MD is located at 318 WATERMAN AVE, East Providence, RI, 02914. Phone: (401) 438-5950.
What is Charles McCoy, MD's NPI number? ▼
Charles McCoy, MD's National Provider Identifier (NPI) is 1922081447, issued on 11/29/2005.
Does Charles McCoy, MD prescribe more brand-name or generic drugs? ▼
Charles McCoy, MD's prescribing is 5% brand-name and 95% generic drugs by claim count, with $819 in brand drug costs.
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 Charles McCoy, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles McCoy, MD's most frequently prescribed drugs include Amlodipine Besylate, Losartan Potassium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles McCoy, MD accept Medicare? ▼
Charles McCoy, MD appears in CMS Medicare data with 248 Part D claims and 76 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles McCoy, MD's credentials? ▼
Charles McCoy, MD's NPI is 1922081447 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.
- 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.