NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1699765586 MD
Verify on CMS → Robert Merrell, MD
Nephrology Physician in Boulder City, Nevada.
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
356
Medicare Part D claims · 54 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$120.4
6 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
Robert Merrell, MD filed 356 Medicare Part D claims in 2023 as a Nephrology Physician in Boulder City, Nevada, prescribing 74% generic.
- 356
- Part D claims, 2023
- 74%
- generic prescribing
- $120.4
- industry payments (Sunshine Act)
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.
Robert Merrell, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
356 Top 43% higher than 57% 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
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Board-eligible specialty (heuristic, not verified)
Robert Merrell, 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 Robert Merrell, MD?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
356 76% vs specialty avg
Specialty distribution in Nevada
How Nephrology Physician compares to other specialties among Nevada 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).
Robert Merrell, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 379 AVENUE I, Boulder City, NV, 89005, with a listed phone of (702) 592-6136. NPI 1699765586 was issued on 10/24/2005.
Medicare Part D records for calendar year 2023 show 356 prescription claims written by this provider, covering 54 Medicare beneficiaries and totaling roughly $173K in drug spend, split 26% brand-name and 74% 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 | 1699765586 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/24/2005 |
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 Robert Merrell, MD. Source: openpaymentsdata.cms.gov.
Total received
$120
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Brand vs generic prescribing mix · Above average
Robert Merrell, MD - brand share 26.0%
Nephrology Physician average
26% brand-name claims vs 74% generic, on 356 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.
356
Total Claims
$173K
Total Drug Cost
54
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 792
- Total Day Supply
- 23,545
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $102K
- Generic Drug Cost
- $71K
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 1.76
- Gender Split
- 41% female / 59% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Robert Merrell, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Farxiga
Farxiga
69 claims
- Calcitriol
Calcitriol
37 claims
- Amlodipine Besylate
Amlodipine Besylate
30 claims
- Furosemide 27
Furosemide
27 claims
- Allopurinol 19
Allopurinol
19 claims
- Atorvastatin Calcium 18
Atorvastatin Calcium
18 claims
- Losartan Potassium 18
Losartan Potassium
18 claims
- Tiopronin 15
Tiopronin
15 claims
| Drug | Claims |
|---|---|
| Farxiga Dapagliflozin Propanediol | 69 |
| Calcitriol | 37 |
| Amlodipine Besylate | 30 |
| Furosemide | 27 |
| Allopurinol | 19 |
| Atorvastatin Calcium | 18 |
| Losartan Potassium | 18 |
| Tiopronin | 15 |
| Prednisone | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Robert Merrell, 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
Robert Merrell, MD's 356 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Nevada
Other clinicians with the same primary specialty enrolled in Nevada, drawn from the same CMS NPPES roster as Merrell.
Dr. Mark Adaimy
M.D.
Las Vegas, NV
Ayoola Adekile
Las Vegas, NV
Dr. Abdallah Alali
MD
Las Vegas, NV
Dr. Milen Amde
M.D.
North Las Vegas, NV
Dr. Marina Antar-Shultz
D.O.
North Las Vegas, NV
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 Nevada 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 Robert Merrell, MD's specialty? ▼
Robert Merrell, MD specializes in Nephrology Physician and practices in Boulder City, Nevada. Credentials: MD.
How much does Robert Merrell, MD prescribe under Medicare Part D? ▼
In 2023, Robert Merrell, MD wrote 356 Medicare Part D claims totaling $173K in drug costs for 54 beneficiaries.
Where is Robert Merrell, MD located? ▼
Robert Merrell, MD is located at 379 AVENUE I, Boulder City, NV, 89005. Phone: (702) 592-6136.
What is Robert Merrell, MD's NPI number? ▼
Robert Merrell, MD's National Provider Identifier (NPI) is 1699765586, issued on 10/24/2005.
Does Robert Merrell, MD prescribe more brand-name or generic drugs? ▼
Robert Merrell, MD's prescribing is 26% brand-name and 74% generic drugs by claim count, with $102K 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 Robert Merrell, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Robert Merrell, MD's most frequently prescribed drugs include Farxiga, Calcitriol, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Merrell, MD accept Medicare? ▼
Robert Merrell, MD appears in CMS Medicare data with 356 Part D claims and 54 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Merrell, MD's credentials? ▼
Robert Merrell, MD's NPI is 1699765586 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.