Quick answers
- Does Zamir Nestelbaum accept Medicare assignment?
- Yes. Medicare's clinician data says Zamir Nestelbaum 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 Zamir Nestelbaum see?
- In 2024, CMS data shows 43 Original Medicare patients and 423 services for Zamir Nestelbaum. This counts Original Medicare only and measures volume, not quality.
- What is Zamir Nestelbaum's NPI number?
- 1518971399. 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 Zamir Nestelbaum, 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 | 43 |
|---|---|
| Services billed to Medicare | 423 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)208 services
- Psychotherapy with evaluation and management visit, 30 minutes (90833)153 services
- Psychotherapy with evaluation and management visit, 1 hour (90838)50 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%
- Anxiety63%
- High blood pressure53%
- Depression51%
- Arthritis35%
- Diabetes26%
Practice locations
Addresses where Zamir Nestelbaum is enrolled with Medicare (CMS data updated October 2, 2026).
- 338 Highland StWorcester, MA 01602 (508) 752‑5880
Group practices
Medicare enrollment lists Zamir Nestelbaum as a member of this group (CMS data updated October 2, 2026).
- Newton Square Health Center PC3 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Worcester
Clinicians with the same Medicare primary specialty in Worcester, MA — not a recommendation.
Other clinicians in Newton Square Health Center PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 1981 (45 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1518971399 |
| 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