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SIDDHARTHA SHYAM NADKARNI M.D.
NPI 1861400814
Psychiatry & Neurology - Epilepsy in New York, NY

Active since August 04, 2006PECOS Enrolled
100/100
CMS Quality Rating
223 E 34TH ST, NEW YORK, NY 10016(646) 558-0807 Get Directions Write a Review

NPPES record last updated: January 4, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 4, 2026, Sep 27, 2024, Jul 11, 2022 and 2 more (5 updates tracked since 2021).

About Siddhartha Shyam Nadkarni M.d. NPPES

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

SIDDHARTHA SHYAM NADKARNI M.D. (NPI 1861400814) is an individual epilepsy provider in New York, New York, licensed in New Jersey (25MA11349100) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Hackensack.

NPPES Registry Identity

NPI1861400814
Entity TypeIndividualMale
Primary Taxonomy2084E0001X
Provider Legal NameSIDDHARTHA SHYAM NADKARNICredential: M.D.
Location Address223 E 34TH STNew York, NY 10016-4852
Mailing Address331 Newman Springs Rd Ste 220Red Bank, NJ 07701-5792 · (732) 807-0877 · Fax (201) 751-1680
Phone(646) 558-0807
Sole ProprietorNo
Enumeration DateAugust 4, 2006
Last NPPES UpdateJanuary 4, 20265 updates tracked since enumeration
NPPES CertifiedJanuary 4, 2026
✔ NPI 1861400814 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychiatry & Neurology · EpilepsyAllopathic & Osteopathic Physicians
Taxonomy Code2084E0001X
License✔ Licensed in NJ · 25MA11349100
Definition
Epilepsy is a subspecialty of neurology focused on the diagnosis and treatment of patients with epilepsy, including new-onset, medically refractory epilepsy, psychogenic nonepileptic seizures, and epilepsy in special populations (the elderly, women, patients with co-morbidities). Epilepsy is a multidisciplinary field that provides comprehensive care of the patient.
Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X · License 25MA11349100 (NJ), 219164 (NY)
Also ListedPsychiatry & Neurology · Clinical NeurophysiologyTaxonomy 2084N0600X · License 219164 (NY)
223 E 34TH ST, New York, NY 10016
Open in Google Maps ↗

Secondary Practice Location 1

Location 1360 Essex St Ste 303Hackensack, NJ 07601-8566 · Phone (551) 996-8100 · Fax (551) 996-4140

Other Identifiers 1

Medicaid2677916NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Siddhartha Shyam Nadkarni M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

3

Medicare enrollment records show Siddhartha Nadkarni reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Epilepsy & Neurophysiology Medical Consultants PA
10 mi
Neurology
20 PROSPECT AVE, SUITE 800
Hackensack, NJ 07601
  • Reassigned Medicare billing, New Jersey enrollment
  • 43 clinicians in this Medicare group
NPI 1013998830 (201) 996-3205
Hackensack Meridian Health Medical Group - Specialty Care PC
29 mi
Surgical Critical Care
331 NEWMAN SPRINGS RD STE 220
Red Bank, NJ 07701
  • Reassigned Medicare billing, New Jersey enrollment
  • 2,844 clinicians in this Medicare group
NPI 1215989249 (732) 807-0800
New York University
1,039 mi
Cardiovascular Disease
3301 QUANTUM BLVD
Boynton Beach, FL 33426
  • Reassigned Medicare billing, New York enrollment
  • 7,712 clinicians in this Medicare group
NPI 1285826438 (877) 648-2964

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 4

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.

Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional 95720
This procedure monitors brain wave activity over 12-26 hours using Video EEG (VEEG). It involves recording brain waves and video to detect irregularities. A healthcare professional will review the data and provide a report. It's non-invasive and safe.
124 services69 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.
42 services20 patients
Measurement of brain wave activity with video (veeg), 2-12 hours with review and report by health care professional 95718
This procedure, known as a Video EEG (VEEG), records brain wave activity for 2-12 hours. It involves attaching electrodes to your scalp and monitoring brain waves while a video records your actions. This helps health professionals understand and diagnose neurological issues.
11 services11 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.
11 services11 patients

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.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability93
Improvement Activities40

Other Providers at the Same Location NPPES 20

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

JOSIANE LAJOIE M.D.
Psychiatry & Neurology (Neurology)
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0800
PROF. WILLIAM S. MACALLISTER PH.D.
Clinical Neuropsychologist
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0809
DR. JUDITH SUSANA BLUVSTEIN M.D.
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0808
PRIYA PURUSHOTHAMAN
Psychiatry & Neurology (Epilepsy)
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0800
STEVEN V PACIA M.D.
Psychiatry & Neurology (Neurology)
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0804
NEW YORK EPILEPSY AND NEUROLOGY, PLLC
Psychiatry & Neurology (Neurology)
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0800
WERNER K DOYLE M.D.
Neurological Surgery
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0804
ALEXANDRA DE SOTO NP
Nurse Practitioner (Family)
223 E 34TH ST
NEW YORK, NY 10016
New York County (646) 558-0806

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 Siddhartha Nadkarni's NPI number?

The NPI number for Siddhartha Nadkarni is 1861400814. It was assigned to this individual provider in the NPPES registry on August 4, 2006.

Where is Siddhartha Nadkarni located?

Siddhartha Nadkarni practices at 223 E 34th St, New York, NY 10016. The listed phone number is (646) 558-0807.

What is Siddhartha Nadkarni's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Epilepsy, with taxonomy code 2084E0001X.

Is Siddhartha Nadkarni enrolled in Medicare?

Yes. Siddhartha Nadkarni is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Siddhartha Nadkarni's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Siddhartha Nadkarni reassigns Medicare benefits to 3 organizations: Epilepsy & Neurophysiology Medical Consultants PA (Hackensack, NJ), Hackensack Meridian Health Medical Group - Specialty Care PC (Red Bank, NJ) and New York University (Boynton Beach, FL). Each 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 Siddhartha Nadkarni's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Siddhartha Nadkarni accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Siddhartha Nadkarni as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Siddhartha Nadkarni was last updated on January 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.