MARIANNE NELLIS MD
NPI 1295175230
Pediatrics - Pediatric Critical Care Medicine in New York, NY

Q: What is Marianne Nellis's NPI number?

The NPI number for Marianne Nellis is 1295175230. It was assigned to this individual provider in the NPPES registry on July 3, 2013.

Q: What is Marianne Nellis's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Q: When was this NPI record last updated?

The NPPES record for Marianne Nellis was last updated on July 3, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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 July 03, 2013PECOS Enrolled

100/100

CMS Quality Rating

525 E 68TH ST, NEW YORK, NY 10065(212) 746-3056(212) 746-8332 Get Directions Write a Review

NPPES record last updated: July 3, 2013. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Marianne Nellis Md NPPES

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

MARIANNE NELLIS MD (NPI 1295175230) is an individual pediatric critical care medicine provider in New York, New York, licensed in New York (234862) and active in the NPI registry since July 2013. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1295175230

Entity TypeIndividualFemale

Primary Taxonomy2080P0203X

Provider Legal NameMARIANNE NELLISCredential: MD

Location Address525 E 68TH STNew York, NY 10065-4870

Mailing Address525 E 68th StNew York, NY 10065-4870

Phone(212) 746-3056

Fax(212) 746-8332

Sole ProprietorNo

Enumeration DateJuly 3, 2013

✔ NPI 1295175230 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2080P0203X

License✔ Licensed in NY · 234862

Definition

A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.

525 E 68TH ST, New York, NY 10065

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marianne Nellis Md 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

Medicare enrollment records show Marianne Nellis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Weill Medical College Of Cornell

Same address

Neurological Surgery

525 E 68TH ST
New York, NY 10065

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

NPI 1326088675 (212) 746-4684

Memorial Pediatric Group

0.1 mi

Pediatrics

1275 YORK AVE
New York, NY 10021

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

NPI 1750352381 (646) 227-3813

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

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 through an Alternative Payment Model

Quality

86.8

Promoting Interoperability

100

Improvement Activities

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.

DR. AKILI HINSON M.D.

Surgery

525 E 68TH ST
NEW YORK, NY 10065

New York County (212) 746-5454

ABBY AVGERINOS

Nurse Practitioner (Adult Health)

525 E 68TH ST
NEW YORK, NY 10065

New York County (610) 742-3894

DR. PAMELA JOAN-YIN TIEU M.D.

Hospitalist

525 E 68TH ST
NEW YORK, NY 10065

New York County (212) 746-5454

JENNIFER ANNE SOO HOO MD

Physical Medicine & Rehabilitation (Sports Medicine)

525 E 68TH ST
NEW YORK, NY 10065

New York County (212) 746-1500

WEILL MEDICAL COLLEGE OF CORNELL

Specialist

525 E 68TH ST
NEW YORK, NY 10065

New York County (212) 746-2846

MS. RACHAEL HALEY BLAIRE PA-C

Physician Assistant

525 E 68TH ST
NEW YORK, NY 10065

New York County (480) 221-9894

DR. NISHA MEHTA-NAIK M.D.

Psychiatry & Neurology (Psychiatry)

525 E 68TH ST, MAIL SLOT 140
NEW YORK, NY 10065

New York County (212) 746-3720

POOJA SHAH SALVI

Student in an Organized Health Care Education/Training Program

525 E 68TH ST
NEW YORK, NY 10065

New York County (646) 962-8413

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 Marianne Nellis's NPI number?

The NPI number for Marianne Nellis is 1295175230. It was assigned to this individual provider in the NPPES registry on July 3, 2013.

Where is Marianne Nellis located?

Marianne Nellis practices at 525 E 68th St, New York, NY 10065. The listed phone number is (212) 746-3056.

What is Marianne Nellis's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Marianne Nellis enrolled in Medicare?

Yes. Marianne Nellis is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marianne Nellis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marianne Nellis reassigns Medicare benefits to 2 organizations: Weill Medical College Of Cornell (New York, NY) and Memorial Pediatric Group (New York, NY). 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 Marianne Nellis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Marianne Nellis was last updated on July 3, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.