GRACE H. CHUN MD
NPI 1639243959
Internal Medicine in Rancho Cordova, CA
About Grace H. Chun Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRACE H. CHUN MD (NPI 1639243959) is an individual internal medicine provider in Rancho Cordova, California, licensed in California (A64887) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Tulane University School Of Medicine (1996).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Grace H. Chun Md 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 Grace Chun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 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 95670 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.
RANCHO CORDOVA, CA 95670
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 Chun's NPI number?
The NPI number for Grace Chun is 1639243959. It was assigned to this individual provider in the NPPES registry on November 20, 2006.
Where is Grace Chun located?
Grace Chun practices at 10725 International Dr, Rancho Cordova, CA 95670. The listed phone number is (916) 631-3000.
What is Grace Chun's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Grace Chun enrolled in Medicare?
Yes. Grace Chun 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 Grace Chun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grace Chun reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, 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 Grace Chun'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 Chun was last updated on December 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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 H. Chun, MD · NPI 1639243959
Internal Medicine physician in Rancho Cordova, California. Individual provider, active in the CMS NPPES registry since November 20, 2006.
## Identity
- **NPI:** 1639243959 (Entity type: Individual)
- **Enumerated:** November 20, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A64887 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 10725 INTERNATIONAL DR, Rancho Cordova, CA 95670-7967
- **Phone:** (916) 631-3000
## 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:** Permanente Medical Group Inc (NPI 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tulane University School Of Medicine, class of 1996
## Record status
- **NPPES last updated:** December 22, 2021
- **Other identifiers:** Medicaid 00A648870 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1639243959) · Data from the CMS NPPES public registry.