ESTHER SUNG MSN, FNP-C
NPI 1740708866
Nurse Practitioner - Family in Buena Park, CA
About Esther Sung Msn, Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ESTHER SUNG MSN, FNP-C (NPI 1740708866) is an individual family provider in Buena Park, California, licensed in California (95006407) and active in the NPI registry since September 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
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
Esther Sung Msn, Fnp-c 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 Reassignment
Medicare enrollment records show Esther Sung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chino, CA 91710
- Reassigned Medicare billing, California enrollment
- 34 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 90620 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 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BUENA PARK, CA 90620
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 Esther Sung's NPI number?
The NPI number for Esther Sung is 1740708866. It was assigned to this individual provider in the NPPES registry on September 8, 2017.
Where is Esther Sung located?
Esther Sung practices at 8850 Valley View St, Buena Park, CA 90620. The listed phone number is (714) 827-7321.
What is Esther Sung's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Esther Sung enrolled in Medicare?
Yes. Esther Sung 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 organization bills Medicare for Esther Sung's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Esther Sung reassigns Medicare benefits to Cajon Medical Group PC (Chino, CA). The 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 Esther Sung'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 Esther Sung was last updated on September 8, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Esther Sung, MSN, FNP-C · NPI 1740708866
Family physician in Buena Park, California. Individual provider, active in the CMS NPPES registry since September 8, 2017.
## Identity
- **NPI:** 1740708866 (Entity type: Individual)
- **Enumerated:** September 8, 2017
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 95006407 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 8850 VALLEY VIEW ST, Buena Park, CA 90620-3562
- **Phone:** (714) 827-7321
## 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:** Cajon Medical Group PC (NPI 1073169298, Chino, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** September 8, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1740708866) · Data from the CMS NPPES public registry.