Quick answers
- Does Eva M. Gassiraro accept Medicare assignment?
- Yes. Medicare's clinician data says Eva M. Gassiraro 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 Eva M. Gassiraro see?
- In 2024, CMS data shows 280 Original Medicare patients and 1,389 services for Eva M. Gassiraro. This counts Original Medicare only and measures volume, not quality.
- What is Eva M. Gassiraro's NPI number?
- 1598762833. 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 Eva M. Gassiraro, 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 | 280 |
|---|---|
| Services billed to Medicare | 1,389 |
| Different services or procedures | 48 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)307 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)243 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)173 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)148 services
- Hemoglobin a1c level (83036)64 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 pressure64%
- High cholesterol43%
- Arthritis40%
- Depression29%
- Anxiety27%
- Diabetes25%
Hospitals where Eva M. Gassiraro works
Medicare's Facility Affiliation Data lists Eva M. Gassiraro 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
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220171
- Mount Auburn HospitalCambridge, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220002
Practice locations
Addresses where Eva M. Gassiraro is enrolled with Medicare (CMS data updated October 2, 2026).
- 300 Mount Auburn StCambridge, MA 02138
- 330 Mount Auburn StCambridge, MA 02138
- 57 Bedford St, Suite 130Lexington, MA 02420 (781) 862‑7500
Group practices
Medicare enrollment lists Eva M. Gassiraro as a member of this group (CMS data updated October 2, 2026).
- Mount Auburn Professional Services Inc231 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Cambridge
Clinicians with the same Medicare primary specialty in Cambridge, MA — not a recommendation.
Other clinicians in Mount Auburn Professional Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Connecticut School Of Medicine |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598762833 |
| 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