2026 NPPES data Gastroenterology Physician NPI 1205218658 M.D.
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Ye Eun Kwak, M.D.

Gastroenterology Physician in Mount Pleasant, Wisconsin. 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
666
Medicare Part D claims · 287 beneficiaries · Gastroenterology Physician avg: 833
Industry payments
$694.27
5 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Ye Eun Kwak, M.D. filed 666 Medicare Part D claims in 2023 as a Gastroenterology Physician in Mount Pleasant, Wisconsin.

666
Part D claims, 2023
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.

Ye Eun Kwak, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

666 Top 31% higher than 69% 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%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. 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)

Ye Eun Kwak, 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 Ye Eun Kwak, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/22/2015

NPI 1205218658

Primary specialty

Gastroenterology Physician

Mid-sized

16,567 US NPIs in this specialty

Medicare Part D claims

666 20% vs specialty avg

2023 prescription claims

Specialty avg: 833

Specialty distribution in Wisconsin

How Gastroenterology Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Largest specialties in Wisconsin (% of in-state providers)

Physical Therapist - 5.6%Physical Therapist5.6%Pharmacist - 4.8%Pharmacist4.8%Registered Nurse - 4.5%Registered Nurse4.5%Professional Counselor - 3.3%Professional Counselor3.3%Student in an Organized Health Care Education/Training Program - 3.3%Student in an Organized Health Care Education/Training Program3.3%Family Medicine Physician - 3.2%Family Medicine Physician3.2%Gastroenterology Physician - 0.2%Gastroenterology Physician0.2%
Largest specialties in Wisconsin (% of in-state 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 Gastroenterology Physician. Verify directly:

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).

Ye Eun Kwak, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 8400 WASHINGTON AVE, Mount Pleasant, WI, 53406, with a listed phone of (262) 884-4000. NPI 1205218658 was issued on 06/22/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Kwak 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 666 prescription claims written by this provider, covering 287 Medicare beneficiaries and totaling roughly $82K in drug spend. 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.

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

8400 WASHINGTON AVE
Mount Pleasant, WI 53406

Provider Details

NPI 1205218658
Specialty Gastroenterology Physician
Credentials M.D.
Gender Female
NPI Issued 06/22/2015

Hospital and facility affiliations

Facilities where Ye Eun Kwak, 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.

Aurora Medical Group, Inc.
Kenosha, WI

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 Ye Eun Kwak, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$694

Largest payer

Boston Scientific Corporation

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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

666
Total Claims
$82K
Total Drug Cost
287
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
836
Total Day Supply
13,327
Generic Drug Cost
$17K
Antibiotic Claims
14

Patient Demographics

Average Patient Age
68.3 years
Avg HCC Risk Score
1.59
Gender Split
66% female / 34% male
Age Distribution
<65: 65, 65-74: 155, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What Ye Eun Kwak, 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
Peg 3350-Electrolyte
Sodium Chloride/Nahco3/Kcl/Peg
169
Ondansetron Hcl
144
Omeprazole
65
Pantoprazole Sodium
31
Linzess
Linaclotide
15
Ursodiol
15
Ondansetron Odt
Ondansetron
13
Cholestyramine
Cholestyramine (With Sugar)
12
Hydrocortisone
12
Trulance
Plecanatide
12

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

Gastroenterology Physician Overview

How Ye Eun Kwak, M.D. fits within the Gastroenterology Physician landscape nationally.

16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider

Ye Eun Kwak, M.D.'s 666 claims are below the specialty average of 833.

Nearby Gastroenterology Physician Providers in Wisconsin

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

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 Wisconsin 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.

Frequently Asked Questions

What is Ye Eun Kwak, M.D.'s specialty?
Ye Eun Kwak, M.D. specializes in Gastroenterology Physician and practices in Mount Pleasant, Wisconsin. Credentials: M.D..
How much does Ye Eun Kwak, M.D. prescribe under Medicare Part D?
In 2023, Ye Eun Kwak, M.D. wrote 666 Medicare Part D claims totaling $82K in drug costs for 287 beneficiaries.
Where is Ye Eun Kwak, M.D. located?
Ye Eun Kwak, M.D. is located at 8400 WASHINGTON AVE, Mount Pleasant, WI, 53406. Phone: (262) 884-4000.
What is Ye Eun Kwak, M.D.'s NPI number?
Ye Eun Kwak, M.D.'s National Provider Identifier (NPI) is 1205218658, issued on 06/22/2015.
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 Ye Eun Kwak, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Ye Eun Kwak, M.D.'s most frequently prescribed drugs include Peg 3350-Electrolyte, Ondansetron Hcl, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ye Eun Kwak, M.D. accept Medicare?
Ye Eun Kwak, M.D. appears in CMS Medicare data with 666 Part D claims and 287 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ye Eun Kwak, M.D.'s credentials?
Ye Eun Kwak, M.D.'s NPI is 1205218658 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

Compiled from official public sources by the PlainDoctor editorial team.