Quick answers
- Does Ronald T. Greene accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald T. Greene 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 Ronald T. Greene see?
- In 2024, CMS data shows 201 Original Medicare patients and 2,382 services for Ronald T. Greene. This counts Original Medicare only and measures volume, not quality.
- What is Ronald T. Greene's NPI number?
- 1861678542. 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 Ronald T. Greene, 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 | 201 |
|---|---|
| Services billed to Medicare | 2,382 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)1,160 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)174 services
- Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)86 services
- Aspiration and/or injection of fluid from large joint (20610)85 services
- X-ray of shoulder, minimum of 2 views (73030)59 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%
- Arthritis64%
- High blood pressure58%
- Anxiety27%
- Ischemic heart disease20%
- Osteoporosis17%
Practice locations
Addresses where Ronald T. Greene is enrolled with Medicare (CMS data updated October 2, 2026).
- 500 Mamaroneck AveHarrison, NY 10528 (203) 869‑1145
- 6 Greenwich Office ParkGreenwich, CT 06831 (203) 869‑1145
Group practices
Medicare enrollment lists Ronald T. Greene as a member of this group (CMS data updated October 2, 2026).
- Orthopaedic and Neurosurgery Specialists, PLLC259 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Harrison
Clinicians with the same Medicare primary specialty in Harrison, NY — not a recommendation.
Other clinicians in Orthopaedic and Neurosurgery Specialists, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Georgia School Of Medicine |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861678542 |
| 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