Quick answers
- Does John S. Greco Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Greco Jr. 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 John S. Greco Jr. see?
- In 2024, CMS data shows 584 Original Medicare patients and 2,843 services for John S. Greco Jr.. This counts Original Medicare only and measures volume, not quality.
- What is John S. Greco Jr.'s NPI number?
- 1770686867. 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 John S. Greco Jr., 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 | 584 |
|---|---|
| Services billed to Medicare | 2,843 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient problem focused exam of visual system (92012)816 services
- Extended exam of the back part of the eye with retinal drawing (92201)462 services
- Established patient complete exam of visual system (92014)447 services
- Extended exam of the back part of the eye with optic nerve drawing (92202)301 services
- Exam of visual field with extended testing (92083)270 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 pressure73%
- Arthritis44%
- Ischemic heart disease34%
- Diabetes31%
- Anxiety18%
Hospitals where John S. Greco Jr. works
Medicare's Facility Affiliation Data lists John S. Greco Jr. 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.
- Riverview Medical CenterRed Bank, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310034
Practice locations
Addresses where John S. Greco Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 130 Maple Ave, Bldg 4 Suite 4bRed Bank, NJ 07701 (732) 741‑7997
Specialties
- Ophthalmologyprimary
Other ophthalmologists in New Jersey
Clinicians with the same Medicare primary specialty in New Jersey — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770686867 |
| 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