NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1558355107 M.D.
Verify on CMS → Arthur Appel, M.D.
Nephrology Physician in Pearl River, New York.
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
846
Medicare Part D claims · 174 beneficiaries · Nephrology Physician avg: 2K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
CMS neutral threshold · no category scores published
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Arthur Appel, M.D. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 846 Medicare Part D claims in 2024.
- 75/100
- CMS neutral score · not measured
- 846
- Part D claims, 2024
- 87%
- 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 Arthur Appel, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1558355107), first enumerated 09/08/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 846 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)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
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.
- State context
State board disciplinary context
New York statewide board action statistics are published annually — these figures describe aggregate state activity, not Arthur Appel, M.D.'s individual license status. Verify directly with the state medical board.
Source: NYSBPMC annual report 2023
- 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 1558355107 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-NEUTRAL · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1558355107
- ENUM-LEGACY 2005
- TAX-MID 11K Nephrology Physician
- MIPS-NEUTRAL 75/100
- RX-LIGHT 846
- BOOK-LIGHT 852 in New York
- PHOTO-ENUM Joju Joseph · 2005
Arthur Appel, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
846 ≥ 72nd percentile 72% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Arthur Appel, M.D. 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 Arthur Appel, M.D.?
CMS neutral score, not measuredPrimary specialty
Nephrology Physician
Medicare Part D claims
846 44% vs specialty avg
MIPS final score
75/100
Specialty distribution in New York
How Nephrology Physician compares to other specialties among New York providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 | 1558355107 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/08/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Group practice
License & disciplinary context - New York NYSBPMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~100K New York medical licensees in 2023 - they are NOT specific to Arthur Appel, M.D.. To verify Arthur Appel, M.D.'s current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Arthur Appel, M.D. - brand share 13.0%
Nephrology Physician average
13% brand-name claims vs 87% generic, on 846 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.
846
Total Claims
$126K
Total Drug Cost
174
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,402.567
- Total Day Supply
- 71,867
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $108K
- Generic Drug Cost
- $18K
Patient Demographics
- Average Patient Age
- 79.5 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 51% female / 49% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Arthur Appel, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
78 claims
- Amlodipine Besylate
Amlodipine Besylate
55 claims
- Levothyroxine Sodium
Levothyroxine Sodium
39 claims
- Furosemide
Furosemide
33 claims
- Hydrochlorothiazide
Hydrochlorothiazide
32 claims
- Allopurinol 31
Allopurinol
31 claims
- Ezetimibe 29
Ezetimibe
29 claims
- Losartan Potassium 26
Losartan Potassium
26 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 78 |
| Amlodipine Besylate | 55 |
| Levothyroxine Sodium | 39 |
| Furosemide | 33 |
| Hydrochlorothiazide | 32 |
| Allopurinol | 31 |
| Ezetimibe | 29 |
| Losartan Potassium | 26 |
| Rosuvastatin Calcium | 25 |
| Metoprolol Tartrate | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Arthur Appel, M.D. 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
Arthur Appel, M.D.'s 846 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 Appel, both outside New York so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 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 New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Appel.
One of 852 Nephrology Physician providers enrolled in New York, 5 are shown here.
Dr. Mersema Abate
MD
East Setauket, NY
Dr. Rula Abdulrahman
M.D.
Stony Brook, NY
Dr. Matthew Abramson
M.D.
New York, NY
Dr. Niraj Acharya
MD
Brooklyn, NY
Dr. Sujatha Addagatla
M.D.
Niagara Falls, NY
Compare Nephrology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Arthur Appel, M.D.'s specialty? ▼
Arthur Appel, M.D. specializes in Nephrology Physician and practices in Pearl River, New York. Credentials: M.D..
How much does Arthur Appel, M.D. prescribe under Medicare Part D? ▼
In 2024, Arthur Appel, M.D. wrote 846 Medicare Part D claims totaling $126K in drug costs for 174 beneficiaries.
What is Arthur Appel, M.D.'s Medicare quality score? ▼
Arthur Appel, M.D. has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. 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 Arthur Appel, M.D. located? ▼
Arthur Appel, M.D. is located at 119 FRANKLIN AVE, Pearl River, NY, 10965. Phone: (845) 735-4100.
What is Arthur Appel, M.D.'s NPI number? ▼
Arthur Appel, M.D.'s National Provider Identifier (NPI) is 1558355107, issued on 09/08/2005.
Does Arthur Appel, M.D. prescribe more brand-name or generic drugs? ▼
Arthur Appel, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $108K 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 Arthur Appel, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Arthur Appel, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Arthur Appel, M.D. accept Medicare? ▼
Arthur Appel, M.D. appears in CMS Medicare data with 846 Part D claims and 174 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Arthur Appel, M.D.'s credentials? ▼
Arthur Appel, M.D.'s NPI is 1558355107 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 (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.