KEYSTONE MEDICAL PC
NPI 1508677873
Internal Medicine - Gastroenterology in Bayside, NY
About Keystone Medical Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KEYSTONE MEDICAL PC (NPI 1508677873) is a healthcare organization registered as a gastroenterology in Bayside, New York and active in the NPI registry since January 2025. The organization lists Won Sohn, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Keystone Medical Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
5Medicare enrollment records show 5 clinicians reassign Medicare billing to Keystone Medical PC, which bills Medicare for the services they deliver. Of these, 1 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (5)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Keystone Medical PC's NPI number?
The NPI number for Keystone Medical PC is 1508677873. It was assigned to this organization in the NPPES registry on January 16, 2025.
Where is Keystone Medical PC located?
Keystone Medical PC is located at 21333 39th Ave Ste 248, Bayside, NY 11361. The listed phone number is (718) 428-5333.
What is Keystone Medical PC's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Keystone Medical PC enrolled in Medicare?
Yes. Keystone Medical PC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Keystone Medical PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 2 Medicare specialties reassign their Medicare billing to Keystone Medical PC. A 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 the clinician's services. The largest specialties are Anesthesiology (4) and Pathology (1). Of these, 1 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Keystone Medical PC was last updated on January 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.
# Keystone Medical Pc · NPI 1508677873
Gastroenterology organization in Bayside, New York. Organization record, active in the CMS NPPES registry since January 16, 2025.
## Identity
- **NPI:** 1508677873 (Entity type: Organization)
- **Enumerated:** January 16, 2025
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **Organization subpart:** No
- **Authorized official:** Won Sohn, PRESIDENT
## Practice location
- **Address:** 21333 39TH AVE STE 248, Bayside, NY 11361-2092
- **Phone:** (718) 428-5333
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 5 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Anesthesiology (4), Pathology (1); 1 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 16, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1508677873) · Data from the CMS NPPES public registry.