NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1558361261 MD
Verify on CMS → Estephan Zayat, MD
Gastroenterology Physician in Wichita, Kansas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,567 in Gastroenterology 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
2K
Medicare Part D claims · 521 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.1 · Exceptional
Industry payments
$1.4K
36 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
Estephan Zayat, MD reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 1,630 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 2K
- Part D claims, 2023
- 79%
- 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.
Estephan Zayat, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 7% higher than 93% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Estephan Zayat, MD sits
This provider among gastroenterology physician peers
Across the 5,957 gastroenterology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Estephan Zayat, MD writes more Part D claims than 83% of them and scores higher on MIPS quality than 91% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one gastroenterology physician peer from a representative sample of 60; the gold marker is Estephan Zayat, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Estephan Zayat, 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 Estephan Zayat, MD?
High performer (top quartile)Primary specialty
Gastroenterology Physician
Medicare Part D claims
1,630 96% vs specialty avg
MIPS final score
100/100 16.9 pts vs avg
Specialty distribution in Kansas
How Gastroenterology Physician compares to other specialties among Kansas providers
Medicare quality performance, MIPS
Estephan Zayat, MD's 2023 MIPS final score plotted against the Gastroenterology Physician national average
- MIPS Final Score
- 100/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Gastroenterology Physician) - 100/100 vs national avg 83.1
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).
Estephan Zayat, MD appears in the CMS NPPES registry as a Gastroenterology Physician provider holding MD credentials at 3121 N WEBB RD, Wichita, KS, 67226, with a listed phone of (316) 261-3130. NPI 1558361261 was issued on 07/22/2005.
Medicare Part D records for calendar year 2023 show 1,630 prescription claims written by this provider, covering 521 Medicare beneficiaries and totaling roughly $2.2 million in drug spend, split 21% brand-name and 79% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year, compared with the national average of 83.1.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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 | 1558361261 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/22/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Avg: 83.1
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Estephan Zayat, 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.
Kansas Gastroenterology LLC
Wichita, KS
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 Estephan Zayat, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.4K
Largest payer
Ipsen Biopharmaceuticals, 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
Estephan Zayat, MD - brand share 21.0%
Gastroenterology Physician average
21% brand-name claims vs 79% generic, on 1,630 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.
1,630
Total Claims
$2.2M
Total Drug Cost
521
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,318
- Total Day Supply
- 60,547
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $2.2M
- Generic Drug Cost
- $58K
- Antibiotic Claims
- 34
Patient Demographics
- Average Patient Age
- 70.8 years
- Avg HCC Risk Score
- 1.24
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 61, 65-74: 297, 75-84: 146, 85+: 17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Estephan Zayat, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pantoprazole Sodium
Pantoprazole Sodium
276 claims
- Famotidine
Famotidine
170 claims
- Omeprazole
Omeprazole
167 claims
- Stelara 66
Stelara
66 claims
- Linzess 64
Linzess
64 claims
- Dicyclomine Hcl 63
Dicyclomine Hcl
63 claims
- Sucralfate 42
Sucralfate
42 claims
- Azathioprine 36
Azathioprine
36 claims
| Drug | Claims |
|---|---|
| Pantoprazole Sodium | 276 |
| Famotidine | 170 |
| Omeprazole | 167 |
| Stelara Ustekinumab | 66 |
| Linzess Linaclotide | 64 |
| Dicyclomine Hcl | 63 |
| Sucralfate | 42 |
| Azathioprine | 36 |
| Dexlansoprazole Dr Dexlansoprazole | 32 |
| Colestipol Hcl | 26 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Estephan Zayat, MD fits within the Gastroenterology Physician landscape nationally.
16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Estephan Zayat, MD's 1,630 claims are above the specialty average of 833.
Nearby Gastroenterology Physician Providers in Kansas
Other clinicians with the same primary specialty enrolled in Kansas, drawn from the same CMS NPPES roster as Zayat.
Dr. Khalil Abuamr
MD
Topeka, KS
Dr. Zunirah Ahmed
M.D.
Kansas City, KS
Dr. William Alsop
MD
Salina, KS
Dr. Phani Ashok Attaluri
M.D.
Olathe, KS
Dr. Madeline Vithya Barnaba Durairaj
MD
Kansas City, KS
Compare Gastroenterology 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 Kansas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gastroenterology 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 Estephan Zayat, MD's specialty? ▼
Estephan Zayat, MD specializes in Gastroenterology Physician and practices in Wichita, Kansas. Credentials: MD.
How much does Estephan Zayat, MD prescribe under Medicare Part D? ▼
In 2023, Estephan Zayat, MD wrote 1,630 Medicare Part D claims totaling $2.2M in drug costs for 521 beneficiaries.
What is Estephan Zayat, MD's Medicare quality score? ▼
Estephan Zayat, MD has a CMS MIPS Final Score of 100/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Estephan Zayat, MD located? ▼
Estephan Zayat, MD is located at 3121 N WEBB RD, Wichita, KS, 67226. Phone: (316) 261-3130.
What is Estephan Zayat, MD's NPI number? ▼
Estephan Zayat, MD's National Provider Identifier (NPI) is 1558361261, issued on 07/22/2005.
Does Estephan Zayat, MD prescribe more brand-name or generic drugs? ▼
Estephan Zayat, MD's prescribing is 21% brand-name and 79% generic drugs by claim count, with $2.2M in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Estephan Zayat, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Estephan Zayat, MD's most frequently prescribed drugs include Pantoprazole Sodium, Famotidine, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Estephan Zayat, MD accept Medicare? ▼
Estephan Zayat, MD appears in CMS Medicare data with 1,630 Part D claims and 521 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Estephan Zayat, MD's credentials? ▼
Estephan Zayat, MD's NPI is 1558361261 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.
- 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 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.