DR. MICHAEL JASON GRUSHKO MD
NPI 1922274364
Internal Medicine in Bronx, NY
About Dr. Michael Jason Grushko Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL JASON GRUSHKO MD (NPI 1922274364) is an individual internal medicine provider in Bronx, New York, licensed in New York (247707) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS, is affiliated with Montefiore Medical Center, and maintains a secondary practice location in Bronx.
NPPES Registry Identity
Specialties & Licenses 3
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 (PECOS)
Dr. Michael Jason Grushko Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Michael Grushko reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bronx, NY 10467
- Reassigned Medicare billing, New York enrollment
- 5,251 clinicians in this Medicare group
Bronx, NY 10451
- Reassigned Medicare billing, New York enrollment
- 971 clinicians in this Medicare group
New York, NY 10037
- Reassigned Medicare billing, New York enrollment
- 2,094 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Montefiore Medical Center
Acute Care Hospitals · Bronx, NYLincoln Medical & Mental Health Center
Acute Care Hospitals · Bronx, NYJacobi Medical Center
Acute Care Hospitals · Bronx, NYQueens Hospital Center
Acute Care Hospitals · Jamaica, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10461 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BRONX, NY 10461
BRONX, NY 10461
BRONX, NY 10461
BRONX, NY 10461
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 Michael Grushko's NPI number?
The NPI number for Michael Grushko is 1922274364. It was assigned to this individual provider in the NPPES registry on May 6, 2008.
Where is Michael Grushko located?
Michael Grushko practices at 1400 Pelham Pkwy S, Bronx, NY 10461. The listed phone number is (718) 918-5735.
What is Michael Grushko's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Michael Grushko enrolled in Medicare?
Yes. Michael Grushko is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Michael Grushko's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Grushko reassigns Medicare benefits to 3 organizations: Montefiore Medical Center (Bronx, NY), Downtown Bronx Medical Associates PC (Bronx, NY) and Physician Affiliate Group Of New York PC (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 Michael Grushko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Michael Grushko affiliated with any hospitals?
According to CMS data, Michael Grushko is affiliated with Montefiore Medical Center, Lincoln Medical & Mental Health Center, Jacobi Medical Center and Queens Hospital Center.
When was this NPI record last updated?
The NPPES record for Michael Grushko was last updated on February 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Dr. Michael Jason Grushko, MD · NPI 1922274364
Internal Medicine physician in Bronx, New York. Individual provider, active in the CMS NPPES registry since May 6, 2008.
## Identity
- **NPI:** 1922274364 (Entity type: Individual)
- **Enumerated:** May 6, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 247707 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1400 PELHAM PKWY S, Bronx, NY 10461-1197
- **Phone:** (718) 918-5735
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Montefiore Medical Center (NPI 1063525152, Bronx, NY); Downtown Bronx Medical Associates PC (NPI 1689618407, Bronx, NY); Physician Affiliate Group Of New York PC (NPI 1013375526, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 2005
## Record status
- **NPPES last updated:** February 20, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1922274364) · Data from the CMS NPPES public registry.