GRACE HYUN MD
NPI 1699829630
Specialist in New York, NY
About Grace Hyun Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRACE HYUN MD (NPI 1699829630) is an individual specialist in New York, New York, licensed in New York (223431) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 9
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Grace Hyun Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Grace Hyun reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10037
- Reassigned Medicare billing, New York enrollment
- 2,094 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 74 clinicians in this Medicare group
Elmhurst, NY 11373
- Reassigned Medicare billing, New York enrollment
- 836 clinicians in this Medicare group
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 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.
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 10032
NEW YORK, NY 10032
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 Grace Hyun's NPI number?
The NPI number for Grace Hyun is 1699829630. It was assigned to this individual provider in the NPPES registry on January 23, 2007.
Where is Grace Hyun located?
Grace Hyun practices at 3959 Broadway Suite 219, New York, NY 10032. The listed phone number is (212) 305-8510.
What is Grace Hyun's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Grace Hyun enrolled in Medicare?
Yes. Grace Hyun is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Grace Hyun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grace Hyun reassigns Medicare benefits to 4 organizations: Physician Affiliate Group Of New York PC (New York, NY), Icahn School Of Medicine At Mount Sinai (New York, NY), Icahn School Of Medicine At Mount Sinai (Elmhurst, NY) and New York University (Boynton Beach, FL). 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 Grace Hyun'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 Grace Hyun was last updated on April 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Grace Hyun, MD · NPI 1699829630
Specialist provider in New York, New York. Individual provider, active in the CMS NPPES registry since January 23, 2007.
## Identity
- **NPI:** 1699829630 (Entity type: Individual)
- **Enumerated:** January 23, 2007
- **Primary specialty:** Specialist · taxonomy 174400000X
- **State license:** 223431 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3959 BROADWAY, SUITE 219, New York, NY 10032-1559
- **Phone:** (212) 305-8510
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Physician Affiliate Group Of New York PC (NPI 1013375526, New York, NY); Icahn School Of Medicine At Mount Sinai (NPI 1750647152, New York, NY); Icahn School Of Medicine At Mount Sinai (NPI 1063766038, Elmhurst, NY); New York University (NPI 1285826438, Boynton Beach, FL) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 12, 2021
- **Other identifiers:** Other 22343101 (NY); Other P3618737 (NY); Medicaid 002671043 (NY); and 6 more
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Source: [NPI Profile](https://npiprofile.com/npi/1699829630) · Data from the CMS NPPES public registry.