Quick answers
- Does Demetrios Katsaros accept Medicare assignment?
- Yes. Medicare's clinician data says Demetrios Katsaros 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 Demetrios Katsaros see?
- In 2024, CMS data shows 52 Original Medicare patients and 3,300 services for Demetrios Katsaros. This counts Original Medicare only and measures volume, not quality.
- What is Demetrios Katsaros's NPI number?
- 1770610180. 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 Demetrios Katsaros, 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 | 52 |
|---|---|
| Services billed to Medicare | 3,300 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Injection, onabotulinumtoxina, 1 unit (J0585)2,697 services
- Chemical peel of outer layer of skin of face (15788)96 services
- Chemical peel of outer layer of nonfacial skin (15792)93 services
- Chemical peel of deep layer of nonfacial skin (15793)86 services
- Chemical peel of deep layer of skin of face (15789)85 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 cholesterol75%
- High blood pressure52%
- Arthritis40%
- Diabetes38%
- Anxiety35%
- COPD25%
Hospitals where Demetrios Katsaros works
Medicare's Facility Affiliation Data lists Demetrios Katsaros 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.
- Methodist Hospitals IncGary, IN · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 150002
- St Mary Medical Center IncHobart, IN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 150034
Practice locations
Addresses where Demetrios Katsaros is enrolled with Medicare (CMS data updated October 2, 2026).
- 7863 Broadway, Suite 135Merrillville, IN 46410 (219) 736‑2047
Specialties
- General Surgeryprimary
- Pain Managementalso
- Vascular Surgeryalso
Other general surgeons in Merrillville
Clinicians with the same Medicare primary specialty in Merrillville, IN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Chicago College Of Medicine And Surgery |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770610180 |
| 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