Denis Ostrovskiy, MD

Medicare activity in 2024

Official CMS public-use data for Denis Ostrovskiy, 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.

Most frequent services

1. Advance care planning, first 30 minutes (99497)856 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)715 services
3. Measurement of brain wave activity (eeg), awake and drowsy (95816)417 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)316 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)236 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%
• Arthritis61%
• Ischemic heart disease45%
• Diabetes33%
• Stroke or mini-stroke32%

Hospitals where Denis Ostrovskiy works

Medicare's Facility Affiliation Data lists Denis Ostrovskiy 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.

• North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106
• St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330182

Practice locations

Addresses where Denis Ostrovskiy is enrolled with Medicare (CMS data updated October 2, 2026).

• 1991 Marcus Ave, Suite 110New Hyde Park, NY 11042

Group practices

Medicare enrollment lists Denis Ostrovskiy as a member of this group (CMS data updated October 2, 2026).

• Neurological Associates of Long Island, PC14 clinicians in the group

Specialties

• Neurologyprimary

Find other Neurology doctors in New York →

Other neurologists in New Hyde Park

Clinicians with the same Medicare primary specialty in New Hyde Park, NY — not a recommendation.

• Daniel M. Sciubba, MD
• Michael D. Kolesnik, DO
• Steven V. Pacia, MD
• Sanjeev V. Kothare
• Selvalakshmi Rathinavelu, MD
• Dwight J. Rosenstein, MD
• David Podwall, MD
• Zipora Fefer, MD

All neurologists in New Hyde Park →

Other clinicians in Neurological Associates of Long Island, PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Michael Han
• Michael Tanlioco, PT
• Teresa M. Deangelis, MD
• Vincent Deorchis, MD
• Ellen K. Haddad, DO
• Dwight J. Rosenstein, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians