DEBORAH R KORENSTEIN MD
NPI 1912925793
Internal Medicine in New York, NY
About Deborah R Korenstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DEBORAH R KORENSTEIN MD (NPI 1912925793) is an individual internal medicine provider in New York, New York, licensed in New York (202646) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Deborah R Korenstein Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Deborah Korenstein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10065
- Reassigned Medicare billing, New York enrollment
- 315 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10065 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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.
NEW YORK, NY 10065
NEW YORK, NY 10065
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 Deborah Korenstein's NPI number?
The NPI number for Deborah Korenstein is 1912925793. It was assigned to this individual provider in the NPPES registry on July 18, 2006.
Where is Deborah Korenstein located?
Deborah Korenstein practices at 300 E 66th St Memorial Sloan-Kettering Cancer Center (altfu), New York, NY 10065. The listed phone number is (646) 888-4730.
What is Deborah Korenstein's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Deborah Korenstein enrolled in Medicare?
Yes. Deborah Korenstein is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Deborah Korenstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Deborah Korenstein reassigns Medicare benefits to Memorial Medical Consultation Group (New York, 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 Deborah Korenstein'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 Deborah Korenstein was last updated on February 11, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Deborah R Korenstein, MD · NPI 1912925793
Internal Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since July 18, 2006.
## Identity
- **NPI:** 1912925793 (Entity type: Individual)
- **Enumerated:** July 18, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 202646 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 E 66TH ST, MEMORIAL SLOAN-KETTERING CANCER CENTER (ALTFU), New York, NY 10065-6800
- **Phone:** (646) 888-4730 · **Fax:** (646) 888-4923
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Memorial Medical Consultation Group (NPI 1053382523, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 11, 2015
- **Other identifiers:** Medicare ID-Type Unspecified 492191; Medicare UPIN G32200
---
Source: [NPI Profile](https://npiprofile.com/npi/1912925793) · Data from the CMS NPPES public registry.