Ronald Krajnik, MD
NPI 1225072184 · Emergency Medicine Physician · Appleton, WI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Krajnik, MD is a Emergency Medicine Physician provider in Appleton, WI (NPI 1225072184).
Provider details
- NPI number
- 1225072184
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35701 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 35 | 34 |
| Prednisone | 30 | 29 |
| Cefdinir | 20 | 19 |
| Ondansetronbrand: Ondansetron Odt | 20 | 20 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 15 | 15 |
| Cephalexin | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 1405 Mill StNew London, WI 54961-2155Phone: (920) 531-2021
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2025-10-16
- Certified
- 2025-10-16
Frequently asked questions
- What is Ronald Krajnik's NPI number?
- Ronald Krajnik's National Provider Identifier (NPI) is 1225072184, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Krajnik's specialty?
- Ronald Krajnik is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Krajnik located?
- Ronald Krajnik's practice location on file with NPPES is 3925 N Gateway Dr, Appleton, WI 54913-7863.
- What is Ronald Krajnik's phone number?
- The practice phone number listed in the NPPES registry for Ronald Krajnik is (920) 702-6371.
- Does Ronald Krajnik accept Medicare?
- Ronald Krajnik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Krajnik's NPI active?
- Yes — Ronald Krajnik's NPI (1225072184) is active in the NPPES registry as of the last update on 2025-10-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.