NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1043265176 PA C
Verify on CMS → Sharon Fey, PA C
Nephrology Physician in Sioux City, Iowa.
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
12K
Medicare Part D claims · 1K beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$483.11
27 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
Sharon Fey, PA C filed 12,444 Medicare Part D claims in 2023 as a Nephrology Physician in Sioux City, Iowa, prescribing 88% generic.
- 12K
- Part D claims, 2023
- 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.
Sharon Fey, PA C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
12,444 Top 2% higher than 98% 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
✓
Board certification likely (heuristic, not verified)
Sharon Fey, PA C 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 Sharon Fey, PA C?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
12,444 9× vs specialty avg
Specialty distribution in Iowa
How Nephrology Physician compares to other specialties among Iowa 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).
Sharon Fey, PA C appears in the CMS NPPES registry as a Nephrology Physician provider holding PA C credentials at 700 4TH STREET, Sioux City, IA, 51101, with a listed phone of (712) 255-7746. NPI 1043265176 was issued on 05/24/2006.
Medicare Part D records for calendar year 2023 show 12,444 prescription claims written by this provider, covering 1,289 Medicare beneficiaries and totaling roughly $1.4 million in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 0.8%.
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 | 1043265176 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | PA C |
| Gender | Female |
| NPI Issued | 05/24/2006 |
Hospital and facility affiliations
Facilities where Sharon Fey, PA C 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.
Liem Som Oei MD PC
Sioux City, IA
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 Sharon Fey, PA C. Source: openpaymentsdata.cms.gov.
Total received
$483
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
Sharon Fey, PA C - brand share 11.0%
Nephrology Physician average
11% brand-name claims vs 88% generic, on 12,444 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.
12,444
Total Claims
$1.4M
Total Drug Cost
1,289
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 19,259
- Total Day Supply
- 562,662
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $1.1M
- Generic Drug Cost
- $317K
- Opioid Claims
- 102 (0.8% rate)
- Antibiotic Claims
- 198
Patient Demographics
- Average Patient Age
- 71.9 years
- Avg HCC Risk Score
- 3.16
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 239, 65-74: 486, 75-84: 412, 85+: 152
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sharon Fey, PA C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Allopurinol
Allopurinol
1,443 claims
- Furosemide 539
Furosemide
539 claims
- Hydralazine Hcl 520
Hydralazine Hcl
520 claims
- Potassium Chloride 503
Potassium Chloride
503 claims
- Calcitriol 480
Calcitriol
480 claims
- Amlodipine Besylate 442
Amlodipine Besylate
442 claims
- Spironolactone 432
Spironolactone
432 claims
- Atorvastatin Calcium 377
Atorvastatin Calcium
377 claims
| Drug | Claims |
|---|---|
| Allopurinol | 1,443 |
| Furosemide | 539 |
| Hydralazine Hcl | 520 |
| Potassium Chloride | 503 |
| Calcitriol | 480 |
| Amlodipine Besylate | 442 |
| Spironolactone | 432 |
| Atorvastatin Calcium | 377 |
| Metoprolol Tartrate | 327 |
| Bumetanide | 317 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Sharon Fey, PA C 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
Sharon Fey, PA C's 12,444 claims are above the specialty average of 1,454.
Nearby Nephrology Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Fey.
Dr. Anwar Ahmed
MD
Cedar Rapids, IA
Dr. Mouhamed Al Sheikha
MD
Davenport, IA
Dr. Jacob Alexander
MD
Ames, IA
Shahed Ammar
Iowa City, IA
Dr. Anis Ansari
M.D.
Clinton, IA
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 Iowa 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 Sharon Fey, PA C's specialty? ▼
Sharon Fey, PA C specializes in Nephrology Physician and practices in Sioux City, Iowa. Credentials: PA C.
How much does Sharon Fey, PA C prescribe under Medicare Part D? ▼
In 2023, Sharon Fey, PA C wrote 12,444 Medicare Part D claims totaling $1.4M in drug costs for 1,289 beneficiaries.
Where is Sharon Fey, PA C located? ▼
Sharon Fey, PA C is located at 700 4TH STREET, Sioux City, IA, 51101. Phone: (712) 255-7746.
What is Sharon Fey, PA C's NPI number? ▼
Sharon Fey, PA C's National Provider Identifier (NPI) is 1043265176, issued on 05/24/2006.
Does Sharon Fey, PA C prescribe more brand-name or generic drugs? ▼
Sharon Fey, PA C's prescribing is 11% brand-name and 88% generic drugs by claim count, with $1.1M in brand drug costs.
Does Sharon Fey, PA C prescribe opioids? ▼
Yes, Sharon Fey, PA C had 102 opioid claims in 2023 with an opioid prescribing rate of 0.8%.
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 Sharon Fey, PA C prescribe most often? ▼
Based on 2023 Medicare Part D data, Sharon Fey, PA C's most frequently prescribed drugs include Allopurinol, Furosemide, Hydralazine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sharon Fey, PA C accept Medicare? ▼
Sharon Fey, PA C appears in CMS Medicare data with 12,444 Part D claims and 1,289 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sharon Fey, PA C's credentials? ▼
Sharon Fey, PA C's NPI is 1043265176 with credentials PA C. 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.