NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1710972559 MD
Verify on CMS → Arnold Barz, MD
Nephrology Physician in Shreveport, Louisiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,806 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
1K
Medicare Part D claims · 193 beneficiaries · Nephrology Physician avg: 2K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
80/100
▼ 3 pts below national avg 83.5 · Above neutral
Industry payments
$1.3K
69 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Arnold Barz, MD reported a CMS MIPS final score of 80/100 - below the 83.5 national average - and filed 1,016 Medicare Part D claims in 2024.
- 80/100
- MIPS score · -3 vs avg
- 1K
- Part D claims, 2024
- 88%
- 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.
Federal trust snapshot
What official records show about Arnold Barz, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1710972559), first enumerated 09/19/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,016 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 80/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$1.3K in reported industry payments (69 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1710972559 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-BELOW · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1710972559
- ENUM-LEGACY 2005
- TAX-MID 11K Nephrology Physician
- MIPS-BELOW 80/100
- RX-MID 1,016
- BOOK-THIN 179 in Louisiana
- PHOTO-FINISH Darryl Elefan · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Barz · this prov…
Barz · this provider
80 MIPS pts
- Nancy Birenboim …
Nancy Birenboim
80 MIPS pts
- Harriet Langley …
Harriet Langley
80 MIPS pts
- Darryl Elefan · …
Darryl Elefan
80 MIPS pts
- Emilian Cristea …
Emilian Cristea
80.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Arnold Barz, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
80 ≥ 30th percentile 30% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Arnold Barz, MD sits
This provider among nephrology physician peers
Across the 2,230 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Arnold Barz, MD writes more Part D claims than 49% of them and scores higher on MIPS quality than 40% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one nephrology physician peer from a representative sample of 60; the gold marker is Arnold Barz, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Arnold Barz, MD 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 Arnold Barz, MD?
Near national averagePrimary specialty
Nephrology Physician
Medicare Part D claims
1,016 33% vs specialty avg
MIPS final score
80/100 3.5 pts vs avg
Specialty distribution in Louisiana
How Nephrology Physician compares to other specialties among Louisiana providers
Medicare quality performance, MIPS
Arnold Barz, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 80/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1710972559 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/19/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
80.0244
Final Score
Measured-score avg: 83.5
69.0353
Quality
40.1257
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Arnold Barz, MD 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.
Northwest Louisiana Nephrology, LLC
Shreveport, LA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Arnold Barz, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
Fresenius USA Marketing, 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.
Brand vs generic prescribing mix · Typical
Arnold Barz, MD - brand share 12.0%
Nephrology Physician average
12% brand-name claims vs 88% generic, on 1,016 2024 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 2024.
1,016
Total Claims
$231K
Total Drug Cost
193
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,885.233
- Total Day Supply
- 55,796
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $193K
- Generic Drug Cost
- $38K
Patient Demographics
- Average Patient Age
- 69.1 years
- Avg HCC Risk Score
- 5.36
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 58, 65-74: 67, 75-84: 50, 85+: 18
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Arnold Barz, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydralazine Hcl
Hydralazine Hcl
122 claims
- Sevelamer Carbonate
Sevelamer Carbonate
86 claims
- Nifedipine Er
Nifedipine Er
64 claims
- Velphoro
Velphoro
53 claims
- Amlodipine Besylate
Amlodipine Besylate
51 claims
- Calcitriol 44
Calcitriol
44 claims
- Bumetanide 42
Bumetanide
42 claims
- Carvedilol 38
Carvedilol
38 claims
| Drug | Claims |
|---|---|
| Hydralazine Hcl | 122 |
| Sevelamer Carbonate | 86 |
| Nifedipine Er Nifedipine | 64 |
| Velphoro Sucroferric Oxyhydroxide | 53 |
| Amlodipine Besylate | 51 |
| Calcitriol | 44 |
| Bumetanide | 42 |
| Carvedilol | 38 |
| Pantoprazole Sodium | 36 |
| Losartan Potassium | 25 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Arnold Barz, MD fits within the Nephrology Physician landscape nationally.
10,806
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,511
Avg Claims per Provider
Arnold Barz, MD's 1,016 claims are below the specialty average of 1,511.
Nationwide Nephrology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Barz, both outside Louisiana so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (80 here).
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nephrology Physician Providers in Louisiana
Other clinicians with the same primary specialty enrolled in Louisiana, drawn from the same CMS NPPES roster as Barz.
One of 179 Nephrology Physician providers enrolled in Louisiana, 5 are shown here.
Ahmed Abdallah
New Orleans, LA
Dr. Zulqarnain Abro
MD
Shreveport, LA
Dr. Saeed Ahmed
M.D.
Kenner, LA
Dr. Alfred Ajise
MD
Natchitoches, LA
Dr. Qais Albataineh
MD
New Orleans, LA
Compare Nephrology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Arnold Barz, MD's specialty? ▼
Arnold Barz, MD specializes in Nephrology Physician and practices in Shreveport, Louisiana. Credentials: MD.
How much does Arnold Barz, MD prescribe under Medicare Part D? ▼
In 2024, Arnold Barz, MD wrote 1,016 Medicare Part D claims totaling $231K in drug costs for 193 beneficiaries.
What is Arnold Barz, MD's Medicare quality score? ▼
Arnold Barz, MD has a CMS MIPS Final Score of 80/100 (Quality: 69, Cost: 40.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Arnold Barz, MD located? ▼
Arnold Barz, MD is located at 1800 BUCKNER ST, Shreveport, LA, 71101. Phone: (318) 227-8899.
What is Arnold Barz, MD's NPI number? ▼
Arnold Barz, MD's National Provider Identifier (NPI) is 1710972559, issued on 09/19/2005.
Does Arnold Barz, MD prescribe more brand-name or generic drugs? ▼
Arnold Barz, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $193K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,806 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,511 Medicare Part D claims per year.
What drugs does Arnold Barz, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Arnold Barz, MD's most frequently prescribed drugs include Hydralazine Hcl, Sevelamer Carbonate, Nifedipine Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Arnold Barz, MD accept Medicare? ▼
Arnold Barz, MD appears in CMS Medicare data with 1,016 Part D claims and 193 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Arnold Barz, MD's credentials? ▼
Arnold Barz, MD's NPI is 1710972559 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.