Quick answers
- Does Melissa A. Greenberg accept Medicare assignment?
- Yes. Medicare's clinician data says Melissa A. Greenberg 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 Melissa A. Greenberg see?
- In 2024, CMS data shows 395 Original Medicare patients and 1,055 services for Melissa A. Greenberg. This counts Original Medicare only and measures volume, not quality.
- What is Melissa A. Greenberg's NPI number?
- 1083956189. 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 Melissa A. Greenberg, 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 | 395 |
|---|---|
| Services billed to Medicare | 1,055 |
| Different services or procedures | 61 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)188 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)157 services
- Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus (87426)128 services
- Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) (87880)99 services
- Detection test by immunoassay with direct visual observation for influenza virus (87804)80 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%
- High blood pressure72%
- Arthritis48%
- Anxiety35%
- Diabetes28%
- Chronic kidney disease25%
Hospitals where Melissa A. Greenberg works
Medicare's Facility Affiliation Data lists Melissa A. Greenberg 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.
- Our Lady of Fatima HospitalNorth Providence, RI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 410005
Practice locations
Addresses where Melissa A. Greenberg is enrolled with Medicare (CMS data updated October 2, 2026).
- 1524 Atwood Ave, Suite 122Johnston, RI 02919 (401) 273‑9400
- 5750 Post RdEast Greenwich, RI 02818 (401) 398‑8760
Group practices
Medicare enrollment lists Melissa A. Greenberg as a member of this group (CMS data updated October 2, 2026).
- Atmed Treatment Center, Inc.11 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Johnston
Clinicians with the same Medicare primary specialty in Johnston, RI — not a recommendation.
Other clinicians in Atmed Treatment Center, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2008 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083956189 |
| 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