Krystian K. Kozak, MD
Hospitalist Physician · Marinette, WI
Krystian K. Kozak, MD is a hospitalist physician with a practice address in Marinette, Wisconsin, and NPI 1336522531, issued on Jul 7, 2015. Check the license (Wisconsin N68055-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Krystian K. Kozak
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- N68055-20 WI
68055 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3003 University Dr, Marinette, WI 54143
- Phone
- (715) 735-4200
- Enumerated
- Jul 7, 2015
- Record last updated
- Mar 5, 2024
- Medicaid ID
- 100075430 WI
- Medicare enrollment
- Enrolled (PECOS I20180529002198); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 894 in Wisconsin → Look up another NPI →
Also registered at 3003 University Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Krystian K. Kozak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license N68055-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average hospitalist physician in 2024
552 Medicare Part D claims for 166 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Eliquis36 claims
- Metoprolol Succinate35 claims
- Amoxicillin-Clavulanate Potass25 claims
- Atorvastatin Calcium25 claims
- Pyridostigmine Bromide16 claims
- Fludrocortisone Acetate13 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.
Bills Medicare through one group practice
- Aurora Medical Group, Inc.Marinette, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Krystian K. Kozak among 894 hospitalist physician records in Wisconsin
Krystian K. Kozak, MD is one of 894 hospitalist physician records with a practice address in Wisconsin. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 55% of them.
- NPI issued2015 · 55% of these records are older, 41% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 86% of these records are
- Graduated2015 · median 2011 among the 768 with a school on file
- Record last updated2024 · 29% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 hospitalist physician records list a practice address in Marinette
They are 8 of the 452 NPPES records with a practice address in Marinette, and 894 hospitalist physician records in Wisconsin.
All 894 in Wisconsin → Every provider in Marinette → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Justin Dorn, MDMarinette, WI 541431144970518
- Sohan ErpenwarMarinette, WI 541431811627367
- Behnam Hajihossainlou, M.D.Marinette, WI 541431407295496
- Shanique Jarrett, D.O.Marinette, WI 541431841678216
- Aimee Morell-Watton, M.D.Marinette, WI 541431073776134
- Qefli Neziri, MDMarinette, WI 541431922109230
- Hung-Wen Yen, MDMarinette, WI 541431235625286
- Maria Kilari, M.DManitowoc, WI 542201790081313
Common questions
What is Krystian K. Kozak, MD's NPI number?
Krystian K. Kozak, MD's National Provider Identifier (NPI) is 1336522531, issued on Jul 7, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Krystian K. Kozak, MD located?
The NPPES record lists a practice address at 3003 University Dr, Marinette, WI, 54143. Phone: (715) 735-4200. Providers update this record themselves, so call before visiting.
How can I verify Krystian K. Kozak, MD's license?
NPPES lists Wisconsin license number N68055-20, 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 Krystian K. Kozak, MD prescribe under Medicare Part D?
In 2024, Krystian K. Kozak, MD had 552 Medicare Part D claims for 166 beneficiaries; the average among hospitalist physician prescribers was 521. 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.