Ronald J. Krajnik, MD
Emergency Medicine Physician · Appleton, WI
Ronald J. Krajnik, MD is an emergency medicine physician with a practice address in Appleton, Wisconsin, and NPI 1225072184, issued on Jun 15, 2006. Check the license (Wisconsin 35701, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ronald J. Krajnik
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 35701 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3925 N Gateway Dr, Appleton, WI 54913
- Phone
- (920) 702-6371
- Enumerated
- Jun 15, 2006
- Record last updated
- Oct 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20041211000009); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1993
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 3925 N Gateway Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Avery AllardFamily Nurse Practitioner1154057214
- Andrea Aragon, NPFamily Nurse Practitioner1740060797
- Carrie Baum, R.D.Registered Dietitian1154447480
- Emily Beyer, NPFamily Nurse Practitioner1720795313
- Daisy Boehm, N.P.Family Nurse Practitioner1194925479
- Renee BrucknerFamily Nurse Practitioner1295614022
Verify Ronald J. Krajnik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 35701Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average emergency medicine physician in 2024
247 Medicare Part D claims for 193 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen35 claims
- Prednisone30 claims
- Cefdinir20 claims
- Ondansetron Odt20 claims
- Amoxicillin-Clavulanate Potass15 claims
- Cephalexin11 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
- Thedacare, IncorporatedAppleton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald J. Krajnik among 1,464 emergency medicine physician records in Wisconsin
Ronald J. Krajnik, MD is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1993 · median 2011 among the 844 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Wisconsin
There are 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Appleton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Lauren Barlow, M.D.Appleton, WI 549151417244518
- Nicholas Bope, MDAppleton, WI 549151902217284
- Reece Cooper, D.O.Appleton, WI 549111831621457
- Tam Diep, DOAppleton, WI 549111467013995
- Jojo HammondAppleton, WI 549151346414091
- Sarah Holets, D.O.Appleton, WI 549111124380803
- Srikar Karanam, D.OAppleton, WI 549151588034227
- Sean McCloy, DOAppleton, WI 549111942377577
Common questions
What is Ronald J. Krajnik, MD's NPI number?
Ronald J. Krajnik, MD's National Provider Identifier (NPI) is 1225072184, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald J. Krajnik, MD located?
The NPPES record lists a practice address at 3925 N Gateway Dr, Appleton, WI, 54913. Phone: (920) 702-6371. Providers update this record themselves, so call before visiting.
How can I verify Ronald J. Krajnik, MD's license?
NPPES lists Wisconsin license number 35701, 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 Ronald J. Krajnik, MD prescribe under Medicare Part D?
In 2024, Ronald J. Krajnik, MD had 247 Medicare Part D claims for 193 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.