DR. DENIS A OSTROVSKIY M.D.
NPI 1437199668
Psychiatry & Neurology - Neurology in Lake Success, NY

Q: What is Denis Ostrovskiy's NPI number?

The NPI number for Denis Ostrovskiy is 1437199668. It was assigned to this individual provider in the NPPES registry on June 7, 2006.

Q: What is Denis Ostrovskiy's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Q: When was this NPI record last updated?

The NPPES record for Denis Ostrovskiy was last updated on May 9, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 07, 2006PECOS EnrolledAccepts Medicare Assignment

95/100

CMS Quality Rating

1991 MARCUS AVENUE, SUITE 110, LAKE SUCCESS, NY 11042(516) 466-4700(516) 466-4810 Get Directions Write a Review

NPPES record last updated: May 9, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr. Denis A Ostrovskiy M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DENIS A OSTROVSKIY M.D. (NPI 1437199668) is an individual neurology provider in Lake Success, New York, licensed in New York (231798-1) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with North Shore University Hospital, and is a graduate of Other (1993).

NPPES Registry Identity

NPI1437199668

Entity TypeIndividualMale

Primary Taxonomy2084N0400X

Provider Legal NameDR. DENIS A OSTROVSKIYCredential: M.D.

Location Address1991 MARCUS AVENUE, SUITE 110Lake Success, NY 11042-2057

Mailing Address1991 Marcus Avenue, Suite 110Lake Success, NY 11042-2057 · (516) 466-4700 · Fax (516) 466-4810

Phone(516) 466-4700

Fax(516) 466-4810

Sole ProprietorNo

Medical School CMSOtherGraduated 1993

Enumeration DateJune 7, 2006

Last NPPES UpdateMay 9, 2011

✔ NPI 1437199668 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians

Taxonomy Code2084N0400X

License✔ Licensed in NY · 231798-1

Definition

A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

Also ListedSpecialistTaxonomy 174400000X · License 231798-1 (NY)

1991 MARCUS AVENUE, Lake Success, NY 11042

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Other Identifiers 2

Medicare ID-Type Unspecified658N61NY · Medicare Provider Number

Medicare UPINI51307NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Denis A Ostrovskiy M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002825387

PECOS Enrollment IDI20060413000648

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Denis Ostrovskiy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Neurological Associates Of Long Island, PC

Same address

Neurology

1991 MARCUS AVENUE, SUITE 110
Lake Success, NY 11042

Reassigned Medicare billing, New York enrollment
14 clinicians in this Medicare group

NPI 1629013495 (516) 466-4700

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

856 services855 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

715 services525 patients

Measurement of brain wave activity (eeg), awake and drowsy 95816

Measurement of brain wave activity, also known as an EEG, is a non-invasive test that records electrical patterns in your brain. This procedure is done when you're awake and drowsy to understand how your brain functions during different states of consciousness.

417 services407 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

316 services316 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

236 services227 patients

Administration of psychological or neuropsychological test by technician, first 30 minutes 96138

This procedure involves a trained technician administering a psychological or neuropsychological test. It's a process that assesses your mental function and behavior. The initial session will last 30 minutes. The aim is to understand your cognitive abilities better.

59 services54 patients

Evaluation of neuropsychological test, first hour 96132

An evaluation of neuropsychological tests is a process to assess your brain's function. It involves tasks designed to measure cognitive abilities such as memory, attention, problem-solving, and language skills. The first hour involves initial testing and observation.

58 services53 patients

Administration of psychological or neuropsychological test by technician, each additional 30 minutes 96139

This service involves a technician administering additional psychological or neuropsychological testing. Each session lasts for an extra 30 minutes. These tests assess cognitive abilities, such as memory, attention, and problem-solving skills, to aid in diagnosing or monitoring mental health conditions.

53 services48 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

33 services32 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

29 services22 patients

Needle measurement of electrical activity in arm or leg muscles, complete study 95886

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.

24 services17 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

17 services17 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

North Shore University Hospital

Acute Care Hospitals · Manhasset, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330106

Location300 Community DriveManhasset, NY 11030 · Nassau County

Emergency services Birthing friendly

St Francis Hospital - The Heart Center

Acute Care Hospitals · Roslyn, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330182

Location100 Port Washington BoulevardRoslyn, NY 11576 · Nassau County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11042 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$154.28 typical visit price

range $67.40 – $203.53

Typical copayment $38.57 (range $16.85 – $50.88)

Most-billed visit code 99204

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

94.11

Improvement Activities

Other Providers at the Same Location NPPES 13

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DAVID PODWALL M.D.

Psychiatry & Neurology (Neurology)

1991 MARCUS AVENUE, SUITE 110
LAKE SUCCESS, NY 11042

Nassau County (516) 466-4700

DR. ANTHONY S COHEN M.D.

Psychiatry & Neurology (Neurology)

1991 MARCUS AVENUE, SUITE 110
LAKE SUCCESS, NY 11042

Nassau County (516) 466-4700

MRS. NAAMA POLLACK M.D

Pediatrics (Pediatric Endocrinology)

1991 MARCUS AVENUE, SUITE M100
NEW HYDE PARK, NY 11042

Nassau County (516) 472-3750

DR. DWIGHT J ROSENSTEIN M.D.

Psychiatry & Neurology (Neurology)

1991 MARCUS AVENUE, SUITE 110
LAKE SUCCESS, NY 11042

Nassau County (516) 466-4700

DR. ALAN MECHANIC M.D.

Neurological Surgery

1991 MARCUS AVENUE, LAKE SUCCESS
NEW YORK, NY 11042

Nassau County (516) 442-2250

DR. RICHARD H BLANCK M.D.

Psychiatry & Neurology (Neurology)

1991 MARCUS AVENUE, SUITE 110
LAKE SUCCESS, NY 11042

Nassau County (516) 466-4700

NEUROLOGICAL ASSOCIATES OF LONG ISLAND, PC

Psychiatry & Neurology (Neurology)

1991 MARCUS AVENUE, SUITE 110
LAKE SUCCESS, NY 11042

Nassau County (516) 466-4700

SARAH MCELROY LMSW

Social Worker

1991 MARCUS AVENUE
LAKE SUCCESS, NY 11042

Nassau County (718) 484-5000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Denis Ostrovskiy's NPI number?

The NPI number for Denis Ostrovskiy is 1437199668. It was assigned to this individual provider in the NPPES registry on June 7, 2006.

Where is Denis Ostrovskiy located?

Denis Ostrovskiy practices at 1991 Marcus Avenue Suite 110, Lake Success, NY 11042. The listed phone number is (516) 466-4700.

What is Denis Ostrovskiy's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Denis Ostrovskiy enrolled in Medicare?

Yes. Denis Ostrovskiy is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Denis Ostrovskiy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Denis Ostrovskiy reassigns Medicare benefits to Neurological Associates Of Long Island, PC (Lake Success, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Denis Ostrovskiy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Denis Ostrovskiy affiliated with any hospitals?

According to CMS data, Denis Ostrovskiy is affiliated with North Shore University Hospital and St Francis Hospital - The Heart Center.

When was this NPI record last updated?

The NPPES record for Denis Ostrovskiy was last updated on May 9, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.