Christopher Koon Sing Jong, M.D.
Internal Medicine Physician · South Pasadena, CA
Christopher Koon Sing Jong, M.D. is an internal medicine physician with a practice address in South Pasadena, California, and NPI 1336336700, issued on Oct 1, 2007. Check the license (California A94265, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christopher Koon Sing Jong
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A94265 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1616 Fair Oaks Ave, South Pasadena, CA 91030
- Phone
- (626) 818-3112
- Enumerated
- Oct 1, 2007
- Record last updated
- Jul 29, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Christopher Koon Sing Jong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
66 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Christopher Koon Sing Jong among 17,696 internal medicine physician records in California
Christopher Koon Sing Jong, M.D. 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in South Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lauren KarpSouth Pasadena, CA 910301760772065
- Dolly Kim, MD MBASouth Pasadena, CA 910301023212487
- Carolyn Lamb, M.D.,South Pasadena, CA 910301841374642
- Christina Stiles, M.D.South Pasadena, CA 910301750679908
- Beauty Swe, MDSouth Pasadena, CA 910301548234479
- Jay Thomas, MDSouth Pasadena, CA 910301013092980
- Liviu Chindris, M.DSierra Madre, CA 910241730156472
- Linda Crawford, DOSierra Madre, CA 910241841360427
Common questions
What is Christopher Koon Sing Jong, M.D.'s NPI number?
Christopher Koon Sing Jong, M.D.'s National Provider Identifier (NPI) is 1336336700, issued on Oct 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Koon Sing Jong, M.D. located?
The NPPES record lists a practice address at 1616 Fair Oaks Ave, South Pasadena, CA, 91030. Phone: (626) 818-3112. Providers update this record themselves, so call before visiting.
How can I verify Christopher Koon Sing Jong, M.D.'s license?
NPPES lists California license number A94265, 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 Christopher Koon Sing Jong, M.D. prescribe under Medicare Part D?
In 2024, Christopher Koon Sing Jong, M.D. had 66 Medicare Part D claims for 11 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.