2026 NPPES data Nephrology Physician NPI 1952543118 M.D.
Verify on CMS →

AARON FEARDAY, M.D.

Nephrology Physician in MERIDIAN, Idaho. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
3K
Medicare Part D claims · 450 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$17.08
6 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

AARON FEARDAY, M.D. filed 2,520 Medicare Part D claims in 2023 as a Nephrology Physician in MERIDIAN, Idaho, prescribing 84% generic.

3K
Part D claims, 2023
84%
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.

AARON FEARDAY, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,520 Top 13% higher than 87% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 certification likely (heuristic — not verified)

AARON FEARDAY, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 AARON FEARDAY, M.D.?

Quality data not reported

NPI registry status

Active

Issued 04/01/2009

NPI 1952543118

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

2,520 73% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Idaho

How Nephrology Physician compares to other specialties among Idaho providers

Idaho providers

Nephrology Physician share within Idaho

1. Nephrology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nephrology Physician share within Idaho

Specialty board-certification context

Estimated specialty board-certified rate — Nephrology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nephrology Physician ABMS/AOA estimate

Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

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).

AARON FEARDAY, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 3525 E LOUISE DR STE 195, MERIDIAN, ID, 83642, with a listed phone of (208) 846-8335. NPI 1952543118 was issued on 04/01/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FEARDAY most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 2,520 prescription claims written by this provider, covering 450 Medicare beneficiaries and totaling roughly $630K in drug spend, split 16% brand-name and 84% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

3525 E LOUISE DR STE 195
MERIDIAN, ID 83642

Provider Details

NPI 1952543118
Specialty Nephrology Physician
Credentials M.D.
Gender Male
NPI Issued 04/01/2009

Hospital and facility affiliations

Facilities where AARON FEARDAY, 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.

ST LUKES CLINIC-TREASURE VALLEY LLC
BOISE, ID

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 AARON FEARDAY, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$17

Largest payer

Travere Therapeutics, Inc.

Most common payment type

Education

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

AARON FEARDAY, M.D. — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 2,520 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.

2,520
Total Claims
$630K
Total Drug Cost
450
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,236
Total Day Supply
185,651
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$559K
Generic Drug Cost
$72K
Antibiotic Claims
14

Patient Demographics

Average Patient Age
73.8 years
Avg HCC Risk Score
2.70
Gender Split
53% female / 47% male
Age Distribution
<65: 49, 65-74: 177, 75-84: 170, 85+: 54

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What AARON FEARDAY, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Chlorthalidone
181
Farxiga
Dapagliflozin Propanediol
175
Amlodipine Besylate
156
Losartan Potassium
150
Spironolactone
143
Hydralazine Hcl
139
Lisinopril
120
Carvedilol
97
Olmesartan Medoxomil
88
Sevelamer Carbonate
81

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nephrology Physician Overview

How AARON FEARDAY, M.D. 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

AARON FEARDAY, M.D.'s 2,520 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in Idaho

Other clinicians with the same primary specialty enrolled in Idaho, drawn from the same CMS NPPES roster as FEARDAY.

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is AARON FEARDAY, M.D.'s specialty?
AARON FEARDAY, M.D. specializes in Nephrology Physician and practices in MERIDIAN, Idaho. Credentials: M.D..
How much does AARON FEARDAY, M.D. prescribe under Medicare Part D?
In 2023, AARON FEARDAY, M.D. wrote 2,520 Medicare Part D claims totaling $630K in drug costs for 450 beneficiaries.
Where is AARON FEARDAY, M.D. located?
AARON FEARDAY, M.D. is located at 3525 E LOUISE DR STE 195, MERIDIAN, ID, 83642. Phone: (208) 846-8335.
What is AARON FEARDAY, M.D.'s NPI number?
AARON FEARDAY, M.D.'s National Provider Identifier (NPI) is 1952543118, issued on 04/01/2009.
Does AARON FEARDAY, M.D. prescribe more brand-name or generic drugs?
AARON FEARDAY, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $559K 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 AARON FEARDAY, M.D. prescribe most often?
Based on 2023 Medicare Part D data, AARON FEARDAY, M.D.'s most frequently prescribed drugs include Chlorthalidone, Farxiga, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AARON FEARDAY, M.D. accept Medicare?
AARON FEARDAY, M.D. appears in CMS Medicare data with 2,520 Part D claims and 450 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AARON FEARDAY, M.D.'s credentials?
AARON FEARDAY, M.D.'s NPI is 1952543118 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

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