Quick answers
- Does Demetrios Halikiopoulos accept Medicare assignment?
- Yes. Medicare's clinician data says Demetrios Halikiopoulos 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 Demetrios Halikiopoulos see?
- In 2024, CMS data shows 543 Original Medicare patients and 3,660 services for Demetrios Halikiopoulos. This counts Original Medicare only and measures volume, not quality.
- What is Demetrios Halikiopoulos's NPI number?
- 1467453506. 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 Demetrios Halikiopoulos, 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 | 543 |
|---|---|
| Services billed to Medicare | 3,660 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- 2d ultrasound scan of eye tissue and structures (76512)766 services
- Photography of the retina (92250)701 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)539 services
- Measurement of corneal curvature and depth of eye (92136)506 services
- Exam of the internal drainage system of eye (92020)301 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 pressure75%
- High cholesterol75%
- Arthritis45%
- Ischemic heart disease33%
- Diabetes31%
- Anxiety22%
Practice locations
Addresses where Demetrios Halikiopoulos is enrolled with Medicare (CMS data updated October 2, 2026).
- 107 Northern Blvd, Suite 205Great Neck, NY 11021 (516) 466‑4670
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Great Neck
Clinicians with the same Medicare primary specialty in Great Neck, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1467453506 |
| 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