ALYSSA KORENSTEIN MD
NPI 1801320825
Family Medicine in New York, NY
About Alyssa Korenstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALYSSA KORENSTEIN MD (NPI 1801320825) is an individual family medicine provider in New York, New York, licensed in New York (303024) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Phoenix, and is a graduate of University Of Arizona College Of Medicine (2017).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Alyssa Korenstein Md 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.
Medicare Billing Reassignments
2Medicare enrollment records show Alyssa Korenstein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10017
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: One Medical Of Ny PC
- 139 clinicians in this Medicare group
New York, NY 10025
- Reassigned Medicare billing, New York enrollment
- 5,251 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 10013 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Alyssa Korenstein's NPI number?
The NPI number for Alyssa Korenstein is 1801320825. It was assigned to this individual provider in the NPPES registry on April 17, 2017.
Where is Alyssa Korenstein located?
Alyssa Korenstein practices at 25 Hudson St, New York, NY 10013. The listed phone number is (888) 663-6331.
What is Alyssa Korenstein's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Alyssa Korenstein enrolled in Medicare?
Yes. Alyssa Korenstein 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 organizations bill Medicare for Alyssa Korenstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alyssa Korenstein reassigns Medicare benefits to 2 organizations: One Medical Of Ny, P.C. (New York, NY) and Montefiore Medical Center (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 Alyssa 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 Alyssa Korenstein was last updated on March 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Alyssa Korenstein, MD · NPI 1801320825
Family Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 17, 2017.
## Identity
- **NPI:** 1801320825 (Entity type: Individual)
- **Enumerated:** April 17, 2017
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 303024 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 25 HUDSON ST, New York, NY 10013-3802
- **Phone:** (888) 663-6331 · **Fax:** (415) 252-7176
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): One Medical Of Ny, P.C. (NPI 1861709487, New York, NY); Montefiore Medical Center (NPI 1760288278, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Arizona College Of Medicine, class of 2017
## Record status
- **NPPES last updated:** March 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1801320825) · Data from the CMS NPPES public registry.