NADIIA MARENYCH MD
NPI 1235668831
Internal Medicine - Endocrinology, Diabetes & Metabolism in Lake Geneva, WI

Q: What is Nadiia Marenych's NPI number?

The NPI number for Nadiia Marenych is 1235668831. It was assigned to this individual provider in the NPPES registry on June 7, 2017.

Q: What is Nadiia Marenych's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Nadiia Marenych was last updated on December 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 07, 2017PECOS EnrolledAccepts Medicare Assignment

146 E GENEVA SQ, LAKE GENEVA, WI 53147(262) 249-5000 Get Directions Write a Review

NPPES record last updated: December 29, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 29, 2025, Jan 30, 2023, Oct 7, 2022 and 3 more (6 updates tracked since 2017).

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About Nadiia Marenych Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NADIIA MARENYCH MD (NPI 1235668831) is an individual endocrinology, diabetes & metabolism provider in Lake Geneva, Wisconsin, licensed in Wisconsin (23048-875) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, is affiliated with Aurora Memorial Hospital Burlington, and is a graduate of Other (2011).

NPPES Registry Identity

NPI1235668831

Entity TypeIndividualFemale

Primary Taxonomy207RE0101X

Provider Legal NameNADIIA MARENYCHCredential: MD

Location Address146 E GENEVA SQLake Geneva, WI 53147-9694

Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250

Phone(262) 249-5000

Sole ProprietorNo

Medical School CMSOtherGraduated 2011

Enumeration DateJune 7, 2017

Last NPPES UpdateDecember 29, 20256 updates tracked since enumeration

NPPES CertifiedDecember 29, 2025

✔ NPI 1235668831 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in WI · 23048-875

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

Also ListedInternal MedicineTaxonomy 207R00000X · License 036.151695 (IL), 125070812 (IL)

Also ListedHospitalistTaxonomy 208M00000X · License 036.151695 (IL)

146 E GENEVA SQ, Lake Geneva, WI 53147

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Other Identifiers 1

Medicaid100214900WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare) and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nadiia Marenych Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1557775285

PECOS Enrollment IDI20221121002959

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

391 services206 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251

This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.

156 services78 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

86 services86 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with provider supplied equipment 95250

This process involves a tiny sensor placed under your skin that checks your blood sugar levels in tissue fluid regularly. The sensor sends these readings to a device, allowing you to track your levels in real-time. This is provided by your healthcare provider.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Aurora Memorial Hospital Burlington

Acute Care Hospitals · Burlington, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520059

Location252 Mchenry StBurlington, WI 53105 · Racine County

Emergency services

Aurora Lakeland Medical Center

Acute Care Hospitals · Elkhorn, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520102

LocationW3985 County Road NnElkhorn, WI 53121 · Walworth County

Emergency services Birthing friendly

Aurora St Lukes Medical Center

Acute Care Hospitals · Milwaukee, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520138

Location2900 W Oklahoma AveMilwaukee, WI 53215 · Milwaukee County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53147 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$123.69 typical visit price

range $53.90 – $163.24

Typical copayment $30.92 (range $13.47 – $40.81)

Most-billed visit code 99204

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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