Isabel K. Cheon, M. D.
Internal Medicine Physician · San Diego, CA
Isabel K. Cheon, M. D. is an internal medicine physician with a practice address in San Diego, California, and NPI 1033425459, issued on Aug 23, 2010. Check the license (California A120346, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Isabel K. Cheon
- Credential
- M. D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A120346 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11375 EL Camino Real Ste 250, San Diego, CA 92130
- Phone
- (858) 214-3150
- Enumerated
- Aug 23, 2010
- Record last updated
- Jul 17, 2026
- Fax
- (525) 214-3153
- Medicare enrollment
- Enrolled (PECOS I20130709000547); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Isabel K. Cheon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A120346Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average internal medicine physician in 2024
4,866 Medicare Part D claims for 509 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 107 claims were for opioids.
Most prescribed
- Atorvastatin Calcium369 claims
- Levothyroxine Sodium321 claims
- Losartan Potassium226 claims
- Amlodipine Besylate187 claims
- Rosuvastatin Calcium153 claims
- Omeprazole129 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
- Scripps HealthLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isabel K. Cheon among 17,696 internal medicine physician records in California
Isabel K. Cheon, 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- 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).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Applestein, M.D.San Diego, CA 921301427011212
- Dayna Arnstein Temby, M. D.San Diego, CA 921301497718324
- Gregory Babikian, M.D.San Diego, CA 921301497719892
- Marilyn Carlin, M.D.San Diego, CA 921301124123088
- Scott Carstens, M.D.San Diego, CA 921301073618831
- Ilia Christy, M.D.San Diego, CA 921301043226889
- Julie Chu, M.D.San Diego, CA 921301174532410
- Julie Gollin, M.D.San Diego, CA 921301841253531
Common questions
What is Isabel K. Cheon, M. D.'s NPI number?
Isabel K. Cheon, M. D.'s National Provider Identifier (NPI) is 1033425459, issued on Aug 23, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Isabel K. Cheon, M. D. located?
The NPPES record lists a practice address at 11375 EL Camino Real Ste 250, San Diego, CA, 92130. Phone: (858) 214-3150. Providers update this record themselves, so call before visiting.
How can I verify Isabel K. Cheon, M. D.'s license?
NPPES lists California license number A120346, 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 Isabel K. Cheon, M. D. prescribe under Medicare Part D?
In 2024, Isabel K. Cheon, M. D. had 4,866 Medicare Part D claims for 509 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.