Quick answers
- Does Vasileios Arsenios Lioutas accept Medicare assignment?
- Yes. Medicare's clinician data says Vasileios Arsenios Lioutas 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 Vasileios Arsenios Lioutas see?
- In 2024, CMS data shows 204 Original Medicare patients and 639 services for Vasileios Arsenios Lioutas. This counts Original Medicare only and measures volume, not quality.
- What is Vasileios Arsenios Lioutas's NPI number?
- 1831332535. 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 Vasileios Arsenios Lioutas, 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 | 204 |
|---|---|
| Services billed to Medicare | 639 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)234 services
- Critical care, first 30-74 minutes (99291)104 services
- Ultrasound of within the brain blood flow (93888)57 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)51 services
- Hospital discharge day management, more than 30 minutes (99239)32 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%
- Stroke or mini-stroke75%
- Arthritis49%
- Atrial fibrillation43%
- Diabetes41%
Hospitals where Vasileios Arsenios Lioutas works
Medicare's Facility Affiliation Data lists Vasileios Arsenios Lioutas 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.
- Beth Israel Deaconess Hospital - NeedhamNeedham, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220083
- Beth Israel Deaconess Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220086
- Mount Auburn HospitalCambridge, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220002
Practice locations
Addresses where Vasileios Arsenios Lioutas is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Deaconess RdBoston, MA 02215 (781) 983‑9088
- 330 Brookline AveBoston, MA 02215 (617) 754‑8612
- 330 Mount Auburn StCambridge, MA 02138 (781) 983‑9088
Group practices
Medicare enrollment lists Vasileios Arsenios Lioutas as a member of these groups (CMS data updated October 2, 2026).
- Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc1,740 clinicians in the group
- Mount Auburn Professional Services Inc231 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Other clinicians in Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831332535 |
| 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