Quick answers
- Does Nicolas W. Shammas accept Medicare assignment?
- Yes. Medicare's clinician data says Nicolas W. Shammas 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 Nicolas W. Shammas see?
- In 2024, CMS data shows 1,774 Original Medicare patients and 4,850 services for Nicolas W. Shammas. This counts Original Medicare only and measures volume, not quality.
- What is Nicolas W. Shammas's NPI number?
- 1922087857. 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 Nicolas W. Shammas, 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 | 1,774 |
|---|---|
| Services billed to Medicare | 4,850 |
| Different services or procedures | 114 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)461 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)427 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)408 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)320 services
- Ultrasound study of arm or leg veins with compression and maneuvers (93970)279 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 disease53%
- Arthritis52%
- Diabetes36%
- Atrial fibrillation36%
Hospitals where Nicolas W. Shammas works
Medicare's Facility Affiliation Data lists Nicolas W. Shammas 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.
- Genesis Health System dba Genesis MDL Center-IlliniSilvis, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140275
- Genesis Medical Center-DavenportDavenport, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160033
- MercyOne Clinton Medical CenterClinton, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160080
- MercyOne Genesis Dewitt Medical CenterDewitt, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161313
- Trinity - BettendorfBettendorf, IA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 160104
Practice locations
Addresses where Nicolas W. Shammas is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1100 36th AveMoline, IL 61265 (309) 743‑6700
- 1227 E Rusholme StDavenport, IA 52803
- 1227 E Rusholme St, Mercyone Genesis Davenport PathologDavenport, IA 52803 (563) 421‑6610
- 1236 E Rusholme StDavenport, IA 52803 (563) 324‑2992
- 1401 W Central Park Ave, Mercyone Genesis Davenport West MedDavenport, IA 52804
Group practices
Medicare enrollment lists Nicolas W. Shammas as a member of these groups (CMS data updated October 2, 2026).
- Genesis Health System224 clinicians in the group
- Cardiovascular Medicine PLLC50 clinicians in the group
Specialties
Other interventional cardiologists in Moline
Clinicians with the same Medicare primary specialty in Moline, IL — not a recommendation.
Other clinicians in Genesis Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922087857 |
| 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