Quick answers
- Does Dariusz Kostrzewa accept Medicare assignment?
- Yes. Medicare's clinician data says Dariusz Kostrzewa accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Dariusz Kostrzewa see?
- In 2024, CMS data shows 297 Original Medicare patients and 1,024 services for Dariusz Kostrzewa. This counts Original Medicare only and measures volume, not quality.
- What is Dariusz Kostrzewa's NPI number?
- 1154317600. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Dariusz Kostrzewa, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 297 |
|---|---|
| Services billed to Medicare | 1,024 |
| Different services or procedures | 41 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)348 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)198 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)161 services
- Hemoglobin a1c level (83036)45 services
- Telephone medical discussion with physician, 11-20 minutes (99442)35 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol67%
- High blood pressure64%
- Arthritis42%
- Ischemic heart disease26%
- Diabetes22%
- Anxiety19%
Hospitals where Dariusz Kostrzewa works
Medicare's Facility Affiliation Data lists Dariusz Kostrzewa at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Newport HospitalNewport, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410006
- Rhode Island HospitalProvidence, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410007
- South County Hospital IncWakefield, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410008
- The Miriam HospitalProvidence, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410012
Practice locations
Addresses where Dariusz Kostrzewa is enrolled with Medicare (CMS data updated October 2, 2026).
- 360 Kingstown Rd, Unit 200Narragansett, RI 02882 (401) 783‑6940
Group practices
Medicare enrollment lists Dariusz Kostrzewa as a member of these groups (CMS data updated October 2, 2026).
- Coastal Medical Physicians Inc225 clinicians in the group
- Alaga Health LLC2 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Narragansett
Clinicians with the same Medicare primary specialty in Narragansett, RI — not a recommendation.
Other clinicians in Coastal Medical Physicians Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1154317600 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians