GRETCHEN CHAN FNP
NPI 1538645957
Nurse Practitioner - Family in Eastchester, NY
About Gretchen Chan Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRETCHEN CHAN FNP (NPI 1538645957) is an individual family provider in Eastchester, New York, licensed in New York (354799) and active in the NPI registry since July 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Accepted Insurance
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
Gretchen Chan Fnp 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
10Medicare enrollment records show Gretchen Chan reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Eastchester, NY 10709
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Medical Group Of New York PC
- 185 clinicians in this Medicare group
New York, NY 10016
- Reassigned Medicare billing, Arizona, Connecticut, Iowa, Nebraska, Ohio, Texas and Washington enrollments
- 12 clinicians in this Medicare group
Rocky Hill, CT 06067
- Reassigned Medicare billing, Connecticut enrollment
- 124 clinicians in this Medicare group
Bryn Mawr, PA 19010
- Reassigned Medicare billing, Pennsylvania enrollment
- 168 clinicians in this Medicare group
Sewell, NJ 08080
- Reassigned Medicare billing, New Jersey enrollment
- 243 clinicians in this Medicare group
Leesburg, VA 20176
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- 266 clinicians in this Medicare group
Raleigh, NC 27615
- Reassigned Medicare billing, North Carolina enrollment
- 290 clinicians in this Medicare group
Simpsonville, SC 29680
- Reassigned Medicare billing, South Carolina enrollment
- 176 clinicians in this Medicare group
Beaumont, TX 77701
- Reassigned Medicare billing, Texas enrollment
- 47 clinicians in this Medicare group
Austin, TX 78758
- Reassigned Medicare billing, Texas enrollment
- 1,188 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.
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10709 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.
Reported Quality Measures
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.
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 Gretchen Chan's NPI number?
The NPI number for Gretchen Chan is 1538645957. It was assigned to this individual provider in the NPPES registry on July 18, 2018. The provider is also known as Gretchen Musgrave.
Where is Gretchen Chan located?
Gretchen Chan practices at 375 White Plains Rd, Eastchester, NY 10709. The listed phone number is (512) 324-4780.
What is Gretchen Chan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Gretchen Chan enrolled in Medicare?
Yes. Gretchen Chan 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 Gretchen Chan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gretchen Chan reassigns Medicare benefits to 10 organizations: Medical Group Of New York, P.C. (Eastchester, NY), Careathome Medical Practice Ky (New York, NY), Mc Diagnostic Of Connecticut, P.C. (Rocky Hill, CT), Minuteclinic Diagnostic Of Pennsylvania LLC (Bryn Mawr, PA), Minuteclinic Diagnostic Of New Jersey LLC (Sewell, NJ) and 5 more organizations, listed in the Medicare section above. 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 Gretchen Chan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gretchen Chan accept?
Health plans from Blue Cross and Blue Shield of NC, Blue Cross and Blue Shield of Texas, CareSource and CareSource (Common Ground Healthcare) list Gretchen Chan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gretchen Chan was last updated on June 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Gretchen Chan, FNP · NPI 1538645957
Family physician in Eastchester, New York. Individual provider, active in the CMS NPPES registry since July 18, 2018.
## Identity
- **NPI:** 1538645957 (Entity type: Individual)
- **Enumerated:** July 18, 2018
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 354799 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 375 WHITE PLAINS RD, Eastchester, NY 10709-2826
- **Phone:** (512) 324-4780
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Medical Group Of New York, P.C. (NPI 1487983516, Eastchester, NY); Careathome Medical Practice Ky (NPI 1467040345, New York, NY); Mc Diagnostic Of Connecticut, P.C. (NPI 1386821932, Rocky Hill, CT); Minuteclinic Diagnostic Of Pennsylvania LLC (NPI 1881738037, Bryn Mawr, PA); Minuteclinic Diagnostic Of New Jersey LLC (NPI 1053353615, Sewell, NJ); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** June 12, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1538645957) · Data from the CMS NPPES public registry.