Nadiia Marenych, MD
Endocrinology, Diabetes & Metabolism Physician · Lake Geneva, WI
Nadiia Marenych, MD is an endocrinology, diabetes & metabolism physician with a practice address in Lake Geneva, Wisconsin, and NPI 1235668831, issued on Jun 7, 2017. Check the license (Wisconsin 23048-875, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nadiia Marenych
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 23048-875 WI
036.151695 IL
125070812 IL
Self-reported in NPPES; status is on the state search - Practice location
- 146 E Geneva SQ, Lake Geneva, WI 53147
- Phone
- (262) 249-5000
- Enumerated
- Jun 7, 2017
- Record last updated
- Dec 29, 2025
- Medicaid ID
- 100214900 WI
- Medicare enrollment
- Enrolled (PECOS I20221121002959); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 187 in Wisconsin → Look up another NPI →
Also registered at 146 E Geneva SQ
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nancy Asencio, APNPNurse Practitioner1962410530
- Austin Bacchus, M.D.Family Medicine Physician1225258171
- Ellen Barnstable, MDDermatology Physician1053948562
- Justine Benin, D.O.Family Medicine Physician1942541362
- Shashi Bhushan, MDInternal Medicine Physician1689774101
Verify Nadiia Marenych in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 23048-875Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
3,057 Medicare Part D claims for 322 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 63% of claims.
Most prescribed
- Levothyroxine Sodium380 claims
- Ozempic327 claims
- Jardiance307 claims
- Lantus Solostar168 claims
- Metformin Hcl Er129 claims
- Trulicity107 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $140.06
8 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Aurora Medical Group, Inc.Milwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nadiia Marenych among 187 endocrinology, diabetes & metabolism physician records in Wisconsin
Nadiia Marenych, MD is one of 187 endocrinology, diabetes & metabolism physician records with a practice address in Wisconsin. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 84% of them.
- NPI issued2017 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2011 · median 2003 among the 134 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Wisconsin
There are 187 endocrinology, diabetes & metabolism physician records in Wisconsin.
All 187 in Wisconsin → Every provider in Lake Geneva → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Aneeba FarooqiLake Geneva, WI 531471780147165
- Linda Hansen, M.D.Kenosha, WI 531431255522231
- Hanna Mariani, M.D.Kenosha, WI 531431013206556
- Randa Sharag Eldin, MDKenosha, WI 531431780161950
- Irina Ciubotaru, MDOak Creek, WI 531541649595588
- Farah Salahuddin, MDKenosha, WI 531401437206893
- Ivica Boban, MDFranklin, WI 531321184855611
- Jerald Marifke, M.D.Franklin, WI 531321821091679
Common questions
What is Nadiia Marenych, MD's NPI number?
Nadiia Marenych, MD's National Provider Identifier (NPI) is 1235668831, issued on Jun 7, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Nadiia Marenych, MD located?
The NPPES record lists a practice address at 146 E Geneva SQ, Lake Geneva, WI, 53147. Phone: (262) 249-5000. Providers update this record themselves, so call before visiting.
How can I verify Nadiia Marenych, MD's license?
NPPES lists Wisconsin license number 23048-875, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nadiia Marenych, MD prescribe under Medicare Part D?
In 2024, Nadiia Marenych, MD had 3,057 Medicare Part D claims for 322 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.