Jinsun Choi, M.D.
Endocrinology, Diabetes & Metabolism Physician · North Tustin, CA
Jinsun Choi, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in North Tustin, California, and NPI 1538310131, issued on Oct 1, 2008. Check the license (California A110962, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jinsun Choi
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A110962 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12231 Newport Ave, North Tustin, CA 92705
- Phone
- (949) 441-2164
- Enumerated
- Oct 1, 2008
- Record last updated
- Aug 29, 2025
- Fax
- (949) 441-2184
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 12231 Newport Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sharon Williams, M.D.Allergy & Immunology Physician1457772949
Verify Jinsun Choi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A110962Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
198 Medicare Part D claims for 40 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Levothyroxine Sodium39 claims
- Forteo26 claims
- Ozempic24 claims
- Alendronate Sodium18 claims
- Insulin Glargine-Yfgn14 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.
Jinsun Choi among 1,131 endocrinology, diabetes & metabolism physician records in California
Jinsun Choi, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 58% of them.
- NPI issued2008 · 58% of these records are older, 36% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 endocrinology, diabetes & metabolism physician record lists a practice address in North Tustin
They are 1 of the 16 NPPES records with a practice address in North Tustin, and 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in North Tustin → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Maruja Diaz Arjonilla, MDSanta Ana, CA 927051841481074
- Yana Stolyarov, M.DSanta Ana, CA 927041982996799
- Phong Bui, MDFountain Valley, CA 927081316177462
- Bachar Kurdi, M.D.Fountain Valley, CA 927081750483327
- Chris Tsimerekis, M.D.Fountain Valley, CA 927081942311832
- Anna Betlachin, MDIrvine, CA 926971396190567
- Neal Maler, MDIrvine, CA 926971497276547
- Qin YangIrvine, CA 926971649408444
Common questions
What is Jinsun Choi, M.D.'s NPI number?
Jinsun Choi, M.D.'s National Provider Identifier (NPI) is 1538310131, issued on Oct 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jinsun Choi, M.D. located?
The NPPES record lists a practice address at 12231 Newport Ave, North Tustin, CA, 92705. Phone: (949) 441-2164. Providers update this record themselves, so call before visiting.
How can I verify Jinsun Choi, M.D.'s license?
NPPES lists California license number A110962, 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 Jinsun Choi, M.D. prescribe under Medicare Part D?
In 2024, Jinsun Choi, M.D. had 198 Medicare Part D claims for 40 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.