Quick answers
- Does Gregory M. Ziolo accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory M. Ziolo 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 Gregory M. Ziolo see?
- In 2024, CMS data shows 1,408 Original Medicare patients and 5,501 services for Gregory M. Ziolo. This counts Original Medicare only and measures volume, not quality.
- What is Gregory M. Ziolo's NPI number?
- 1972503001. 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 Gregory M. Ziolo, 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 | 1,408 |
|---|---|
| Services billed to Medicare | 5,501 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)1,818 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)1,607 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)474 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)410 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)246 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 disease48%
- Arthritis44%
- Diabetes39%
- Atrial fibrillation35%
Hospitals where Gregory M. Ziolo works
Medicare's Facility Affiliation Data lists Gregory M. Ziolo 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.
- Chilton Medical CenterPompton Plains, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310017
- Morristown Medical CenterMorristown, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310015
- Newton Medical CenterNewton, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310028
- St Mary's General HospitalPassaic, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310006
Practice locations
Addresses where Gregory M. Ziolo is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Madison AveMorristown, NJ 07960 (973) 971‑5596
- 333 Mount Hope AveRockaway, NJ 07866
- 95 Madison Ave, Suite 204Morristown, NJ 07960 (973) 971‑7440
Group practices
Medicare enrollment lists Gregory M. Ziolo as a member of these groups (CMS data updated October 2, 2026).
- Practice Associates Medical Group1,408 clinicians in the group
- Cardiovascular Health Consultants, P.A.119 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New Jersey →
Other cardiologists in Morristown
Clinicians with the same Medicare primary specialty in Morristown, NJ — not a recommendation.
Other clinicians in Practice Associates Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972503001 |
| 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