NITIN MARIWALLA MD PLLC
NPI 1659943942
Neurological Surgery in West Islip, NY

Active since July 15, 2021
1175 MONTAUK HWY STE 3, WEST ISLIP, NY 11795(631) 500-9400(631) 500-9444 Get Directions Write a Review

NPPES record last updated: October 21, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 29, 2022, Jul 15, 2021 (2 updates tracked since 2021).

About Nitin Mariwalla Md Pllc NPPES

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

NITIN MARIWALLA MD PLLC (NPI 1659943942) is a healthcare organization registered as a neurological surgery in West Islip, New York and active in the NPI registry since July 2021. The organization lists Christian Galan, Director Of Client Services, as its authorized official.

NPPES Registry Identity

NPI1659943942
Entity TypeOrganization
Primary Taxonomy207T00000X
Legal Business NameNITIN MARIWALLA MD PLLC
Location Address1175 MONTAUK HWY STE 3West Islip, NY 11795-4939
Mailing Address1175 Montauk Hwy Ste 3West Islip, NY 11795-4939 · (631) 500-9400 · Fax (631) 500-9444
Fax(631) 500-9444
Organization SubpartNo
Authorized OfficialChristian GalanDirector Of Client Services · (631) 500-9400
Enumeration DateJuly 15, 2021
Last NPPES UpdateOctober 21, 20252 updates tracked since enumeration
NPPES CertifiedOctober 21, 2025
✔ NPI 1659943942 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
1175 MONTAUK HWY STE 3, West Islip, NY 11795

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nitin Mariwalla Md Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

13

Medicare enrollment records show 13 clinicians reassign Medicare billing to Nitin Mariwalla MD PLLC, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 5 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 7

Neurosurgery5
Nurse Practitioner3
Anesthesiology1
Neurology1
Orthopedic Surgery1
Pain Management1
Physical Medicine and Rehabilitation1

Clinicians, nearest first (13)

Neurosurgery
NPI 1033378161
1175 MONTAUK HWY STE 3
West Islip, NY 11795
(631) 500-9400
✔ PECOS✔ Accepts MedicareSame address
Neurology
NPI 1093167421
1175 MONTAUK HWY STE 3
West Islip, NY 11795
(631) 500-9400
✔ PECOS✔ Accepts MedicareSame address
Neurosurgery
NPI 1962619023
500 MONTAUK HWY STE K
West Islip, NY 11795
(252) 903-8657
✔ PECOS✔ Accepts Medicare0.9 mi
Physical Medicine and Rehabilitation
NPI 1780840561
206 E. JERICO TURNPIKE
Huntington Station, NY 11746
(631) 847-0200
✔ PECOS✔ Accepts Medicare9.0 mi
Neurosurgery
NPI 1578880274
353 VETERANS MEMORIAL HWY
Commack, NY 11725
(631) 983-8400
✔ PECOS✔ Accepts Medicare9.6 mi
Neurosurgery
NPI 1932485752
33 WALT WHITMAN RD STE 306
Huntington Station, NY 11746
(718) 246-8660
✔ PECOS✔ Accepts Medicare11 mi
Orthopedic Surgery
NPI 1568781268
290 E MAIN ST STE 200
Smithtown, NY 11787
(631) 361-5302
✔ PECOS12 mi
Nurse Practitioner
NPI 1124618228
1 JARVIN RD
Port Jefferson Station, NY 11776
(929) 429-6861
✔ PECOS✔ Accepts Medicare20 mi
Nurse Practitioner
NPI 1154763639
941 BURKE AVE
Bronx, NY 10469
(888) 789-6672
✔ PECOS✔ Accepts Medicare32 mi
Nurse Practitioner
NPI 1104130947
609 W 114TH ST APT. 73
New York, NY 10025
(917) 597-3533
✔ PECOS✔ Accepts Medicare36 mi
Neurosurgery
NPI 1609304112
NEW YORK BRAIN, SPINE & JOINT 290 COMMUNITY DR
Great Neck, NY 11021
(516) 487-1902
✔ PECOS✔ Accepts Medicare38 mi
Pain Management
NPI 1275848970
700 BOISSEAU AVE
Southold, NY 11971
(631) 477-5353
✔ PECOS✔ Accepts Medicare52 mi
Anesthesiology
NPI 1912126244
4901 DAWN DR SUITE 3300
Lumberton, NC 28360
(910) 671-9298
✔ PECOS✔ Accepts Medicare521 mi

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

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 Nitin Mariwalla MD PLLC's NPI number?

The NPI number for Nitin Mariwalla MD PLLC is 1659943942. It was assigned to this organization in the NPPES registry on July 15, 2021.

Where is Nitin Mariwalla MD PLLC located?

Nitin Mariwalla MD PLLC is located at 1175 Montauk Hwy Ste 3, West Islip, NY 11795. The listed phone number is (631) 500-9400.

What is Nitin Mariwalla MD PLLC's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Nitin Mariwalla MD PLLC enrolled in Medicare?

Yes. Nitin Mariwalla MD PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Nitin Mariwalla MD PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 13 clinicians in 7 Medicare specialties reassign their Medicare billing to Nitin Mariwalla MD PLLC. A 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 the clinician's services. The largest specialties are Neurosurgery (5), Nurse Practitioner (3) and Anesthesiology (1). Of these, 2 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Nitin Mariwalla MD PLLC was last updated on October 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.