Quick answers
- Does Jaroslav Zivny accept Medicare assignment?
- Yes. Medicare's clinician data says Jaroslav Zivny 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 Jaroslav Zivny see?
- In 2024, CMS data shows 398 Original Medicare patients and 895 services for Jaroslav Zivny. This counts Original Medicare only and measures volume, not quality.
- What is Jaroslav Zivny's NPI number?
- 1144203076. 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 Jaroslav Zivny, 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 | 398 |
|---|---|
| Services billed to Medicare | 895 |
| Different services or procedures | 66 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)108 services
- Review by radiologist of image from tube placement into bile duct using an endoscope (74328)87 services
- Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)61 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)54 services
- Insertion of stent into pancreatic or bile duct using a flexible endoscope (43274)50 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%
- Arthritis45%
- Anxiety37%
- Diabetes35%
- Ischemic heart disease32%
Hospitals where Jaroslav Zivny works
Medicare's Facility Affiliation Data lists Jaroslav Zivny 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.
- Lakeland Regional Medical CenterLakeland, FL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 100157
- Marlborough HospitalMarlborough, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220049
- Milford Regional Medical CenterMilford, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220090
- UMass Memorial Healthalliance HospitalsLeominster, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220001
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220163
Practice locations
Addresses where Jaroslav Zivny is enrolled with Medicare (CMS data updated October 2, 2026).
- 119 Belmont StWorcester, MA 01605 (508) 831‑1272
- 35 Medical Ctr PkwyAugusta, ME 04330 (207) 621‑1000
Group practices
Medicare enrollment lists Jaroslav Zivny as a member of these groups (CMS data updated October 2, 2026).
- UMass Memorial Medical Group Inc2,516 clinicians in the group
- Mainegeneral Medical Center555 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Worcester
Clinicians with the same Medicare primary specialty in Worcester, MA — not a recommendation.
Other clinicians in UMass Memorial Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144203076 |
| 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