Quick answers
- Does Ronald Guzas accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald Guzas 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 Ronald Guzas see?
- In 2024, CMS data shows 546 Original Medicare patients and 907 services for Ronald Guzas. This counts Original Medicare only and measures volume, not quality.
- What is Ronald Guzas's NPI number?
- 1437240363. 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 Ronald Guzas, 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 | 546 |
|---|---|
| Services billed to Medicare | 907 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)411 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)236 services
- Emergency department visit with moderate level of medical decision making (99284)95 services
- Critical care, first 30-74 minutes (99291)61 services
- Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)39 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%
- Arthritis51%
- Ischemic heart disease46%
- Anxiety43%
- Chronic kidney disease41%
Hospitals where Ronald Guzas works
Medicare's Facility Affiliation Data lists Ronald Guzas 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.
- Saint Clare's Hospital/ Denville CampusDenville, NJ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 310050
Practice locations
Addresses where Ronald Guzas is enrolled with Medicare (CMS data updated October 2, 2026).
- 25 Pocono RdDenville, NJ 07834 (973) 625‑6511
Group practices
Medicare enrollment lists Ronald Guzas as a member of this group (CMS data updated October 2, 2026).
- Emergency Physicians of Saint Clares LLC10 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Denville
Clinicians with the same Medicare primary specialty in Denville, NJ — not a recommendation.
Other clinicians in Emergency Physicians of Saint Clares LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437240363 |
| 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