Quick answers
- Does Marina Kreiter accept Medicare assignment?
- Yes. Medicare's clinician data says Marina Kreiter 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 Marina Kreiter see?
- In 2024, CMS data shows 136 Original Medicare patients and 205 services for Marina Kreiter. This counts Original Medicare only and measures volume, not quality.
- What is Marina Kreiter's NPI number?
- 1598429870. 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 Marina Kreiter, 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 | 136 |
|---|---|
| Services billed to Medicare | 205 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)108 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)43 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)40 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 blood pressure75%
- High cholesterol75%
- Ischemic heart disease59%
- Arthritis58%
- Atrial fibrillation53%
- Heart failure43%
Hospitals where Marina Kreiter works
Medicare's Facility Affiliation Data lists Marina Kreiter 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.
- Kent County Memorial HospitalWarwick, RI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 410009
- South County Hospital IncWakefield, RI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 410008
Practice locations
Addresses where Marina Kreiter is enrolled with Medicare (CMS data updated October 2, 2026).
- 455 Toll Gate RdWarwick, RI 02886 (401) 737‑7010
Group practices
Medicare enrollment lists Marina Kreiter as a member of this group (CMS data updated October 2, 2026).
- Affinity Physicians LLC.730 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Warwick
Clinicians with the same Medicare primary specialty in Warwick, RI — not a recommendation.
Other clinicians in Affinity Physicians LLC.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2022 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598429870 |
| 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