Krystian Kozak, MD
NPI 1336522531 · Hospitalist Physician · Marinette, WI
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Krystian Kozak, MD is a Hospitalist Physician provider in Marinette, WI (NPI 1336522531).
Provider details
- NPI number
- 1336522531
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 68055 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
662 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 260 | $109 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 203 | $71 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 138 | $104 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 61 | $158 |
Typical Medicare-allowed amounts for these services range $71–$158 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 36 | — |
| Metoprolol Succinate | 35 | 16 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 25 | 23 |
| Atorvastatin Calcium | 25 | — |
| Pyridostigmine Bromide | 16 | — |
| Fludrocortisone Acetate | 13 | — |
| Metoprolol Tartrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-07-07
- Last updated
- 2024-03-05
- Certified
- 2024-03-05
Frequently asked questions
- What is Krystian Kozak's NPI number?
- Krystian Kozak's National Provider Identifier (NPI) is 1336522531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Krystian Kozak's specialty?
- Krystian Kozak is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Krystian Kozak located?
- Krystian Kozak's practice location on file with NPPES is 3003 University Dr, Marinette, WI 54143.
- What is Krystian Kozak's phone number?
- The practice phone number listed in the NPPES registry for Krystian Kozak is (715) 735-4200.
- Does Krystian Kozak accept Medicare?
- Krystian Kozak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Krystian Kozak's NPI active?
- Yes — Krystian Kozak's NPI (1336522531) is active in the NPPES registry as of the last update on 2024-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.