Grace H. Chun, MD
Internal Medicine Physician · Rancho Cordova, CA
Grace H. Chun, MD is an internal medicine physician with a practice address in Rancho Cordova, California, and NPI 1639243959, issued on Nov 20, 2006. Check the license (California A64887, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Grace H. Chun
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A64887 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10725 International Dr, Rancho Cordova, CA 95670
- Phone
- (916) 631-3000
- Enumerated
- Nov 20, 2006
- Record last updated
- Dec 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A648870 CA
- Medicare enrollment
- Enrolled (PECOS I20110413000609); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10725 International Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Grace H. Chun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64887Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% more Medicare Part D claims than the average internal medicine physician in 2024
5,777 Medicare Part D claims for 434 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 343 claims were for opioids.
Most prescribed
- Atorvastatin Calcium450 claims
- Amlodipine Besylate263 claims
- Hydrocodone-Acetaminophen228 claims
- Losartan Potassium224 claims
- Hydrochlorothiazide223 claims
- Levothyroxine Sodium216 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncStockton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grace H. Chun among 17,696 internal medicine physician records in California
Grace H. Chun, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 internal medicine physician records list a practice address in Rancho Cordova
They are 18 of the 872 NPPES records with a practice address in Rancho Cordova, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Rancho Cordova → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Hemal Amin, M.D.Rancho Cordova, CA 956701689786907
- Josefina Aquino, M.D.Rancho Cordova, CA 956701427021229
- Saraswathy Balasingam, M.D.Rancho Cordova, CA 956701083687743
- Jennifer Choy, DORancho Cordova, CA 956701346328085
- Vasudeva Desai, M.D.Rancho Cordova, CA 956701255362802
- Kali Eswaran, M.D.Rancho Cordova, CA 956701710950977
- James Foster, MDRancho Cordova, CA 956701114005824
- Michael Li, M.D.Rancho Cordova, CA 956701588639405
Common questions
What is Grace H. Chun, MD's NPI number?
Grace H. Chun, MD's National Provider Identifier (NPI) is 1639243959, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Grace H. Chun, MD located?
The NPPES record lists a practice address at 10725 International Dr, Rancho Cordova, CA, 95670. Phone: (916) 631-3000. Providers update this record themselves, so call before visiting.
How can I verify Grace H. Chun, MD's license?
NPPES lists California license number A64887, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Grace H. Chun, MD prescribe under Medicare Part D?
In 2024, Grace H. Chun, MD had 5,777 Medicare Part D claims for 434 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.