NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1518096577 M.D.
Verify on CMS → Ross Isaacs, M.D.
Nephrology Physician in Charlottesville, 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 10,569 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
3K
Medicare Part D claims · 273 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
80%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
95.1/100
▲ 12 pts above national avg 83.1 · Exceptional
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
Ross Isaacs, M.D. reported a CMS MIPS final score of 95.1/100 - above the 83.1 national average - and filed 2,646 Medicare Part D claims in 2023.
- 95.1/100
- MIPS score · +12 vs avg
- 3K
- Part D claims, 2023
- 80%
- 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.
Ross Isaacs, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
95 Top 21% higher than 79% 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 Ross Isaacs, M.D. 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, Ross Isaacs, M.D. writes more Part D claims than 84% of them and scores higher on MIPS quality than 82% - 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 nephrology physician peer from a representative sample of 60; the gold marker is Ross Isaacs, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ross Isaacs, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Ross Isaacs, M.D.?
High performer (top quartile)Primary specialty
Nephrology Physician
Medicare Part D claims
2,646 82% vs specialty avg
MIPS final score
95.1/100 12 pts vs avg
Specialty distribution in Virginia
How Nephrology Physician compares to other specialties among Virginia providers
Medicare quality performance, MIPS
Ross Isaacs, M.D.'s 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 95.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Nephrology Physician) - 95.1/100 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).
Ross Isaacs, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 310 AVON ST STE 9, Charlottesville, VA, 22902, with a listed phone of (434) 581-3271. NPI 1518096577 was issued on 03/05/2007.
Medicare Part D records for calendar year 2023 show 2,646 prescription claims written by this provider, covering 273 Medicare beneficiaries and totaling roughly $389K in drug spend, split 19% brand-name and 80% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 95.1/100 for the 2023 performance year (Quality 86.3), compared with the national average of 83.1.
Nephrology Physician is a mid-sized specialty nationwide, with 10,569 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 | 1518096577 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/05/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
95.1126
Final Score
Avg: 83.1
86.3184
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Ross Isaacs, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Sentara Medical Group
Williamsburg, VA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Ross Isaacs, M.D. - brand share 19.0%
Nephrology Physician average
19% brand-name claims vs 80% generic, on 2,646 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.
2,646
Total Claims
$389K
Total Drug Cost
273
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,637
- Total Day Supply
- 163,073
- Brand vs Generic
- 19% brand / 80% generic
- Brand Drug Cost
- $341K
- Generic Drug Cost
- $47K
- Antibiotic Claims
- 87
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.48
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 13, 65-74: 114, 75-84: 109, 85+: 37
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ross Isaacs, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
134 claims
- Atorvastatin Calcium
Atorvastatin Calcium
124 claims
- Prednisone
Prednisone
104 claims
- Amlodipine Besylate
Amlodipine Besylate
80 claims
- Losartan Potassium
Losartan Potassium
78 claims
- Metformin Hcl Er
Metformin Hcl Er
74 claims
- Gabapentin
Gabapentin
65 claims
- Mirtazapine
Mirtazapine
63 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 134 |
| Atorvastatin Calcium | 124 |
| Prednisone | 104 |
| Amlodipine Besylate | 80 |
| Losartan Potassium | 78 |
| Metformin Hcl Er Metformin Hcl | 74 |
| Gabapentin | 65 |
| Mirtazapine | 63 |
| Carvedilol | 55 |
| Tamsulosin Hcl | 51 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Ross Isaacs, M.D. fits within the Nephrology Physician landscape nationally.
10,569
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Ross Isaacs, M.D.'s 2,646 claims are above the specialty average of 1,454.
Nearby Nephrology Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Isaacs.
Dr. Mark Aarons
M.D.
Arlington, VA
Emaad Abdel-Rahman
Charlottesville, VA
Dr. Walid Abou Assi
M.D.
Richmond, VA
Dr. Christopher Acker
M.D.
Richmond, VA
Dr. Oscar Adler
M.D., PHD
Leesburg, VA
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 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.
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Frequently Asked Questions
What is Ross Isaacs, M.D.'s specialty? ▼
Ross Isaacs, M.D. specializes in Nephrology Physician and practices in Charlottesville, Virginia. Credentials: M.D..
How much does Ross Isaacs, M.D. prescribe under Medicare Part D? ▼
In 2023, Ross Isaacs, M.D. wrote 2,646 Medicare Part D claims totaling $389K in drug costs for 273 beneficiaries.
What is Ross Isaacs, M.D.'s Medicare quality score? ▼
Ross Isaacs, M.D. has a CMS MIPS Final Score of 95.1/100 (Quality: 86.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ross Isaacs, M.D. located? ▼
Ross Isaacs, M.D. is located at 310 AVON ST STE 9, Charlottesville, VA, 22902. Phone: (434) 581-3271.
What is Ross Isaacs, M.D.'s NPI number? ▼
Ross Isaacs, M.D.'s National Provider Identifier (NPI) is 1518096577, issued on 03/05/2007.
Does Ross Isaacs, M.D. prescribe more brand-name or generic drugs? ▼
Ross Isaacs, M.D.'s prescribing is 19% brand-name and 80% generic drugs by claim count, with $341K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,569 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 Ross Isaacs, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ross Isaacs, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ross Isaacs, M.D. accept Medicare? ▼
Ross Isaacs, M.D. appears in CMS Medicare data with 2,646 Part D claims and 273 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ross Isaacs, M.D.'s credentials? ▼
Ross Isaacs, M.D.'s NPI is 1518096577 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
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.