Quick answers
- Does Eleftheria Tsavoussis accept Medicare assignment?
- Yes. Medicare's clinician data says Eleftheria Tsavoussis 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 Eleftheria Tsavoussis see?
- In 2024, CMS data shows 27 Original Medicare patients and 248 services for Eleftheria Tsavoussis. This counts Original Medicare only and measures volume, not quality.
- What is Eleftheria Tsavoussis's NPI number?
- 1821073586. 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 Eleftheria Tsavoussis, 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 | 27 |
|---|---|
| Services billed to Medicare | 248 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Psychotherapy with evaluation and management visit, 45 minutes (90836)123 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)112 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)12 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).
- Anxiety75%
- Depression59%
- Arthritis56%
- High blood pressure52%
- High cholesterol52%
Practice locations
Addresses where Eleftheria Tsavoussis is enrolled with Medicare (CMS data updated October 2, 2026).
- 210 Bear Hill RdWaltham, MA 02451 (781) 966‑0070
Group practices
Medicare enrollment lists Eleftheria Tsavoussis as a member of this group (CMS data updated October 2, 2026).
- Waltham Behavioral Health LLC8 clinicians in the group
Specialties
Find other clinicians: Certified Clinical Nurse Specialist (CNS), Massachusetts →
Other clinical nurse specialists in Massachusetts
Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.
Other clinicians in Waltham Behavioral Health LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | Boston University School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821073586 |
| 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
- 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