Jien Shim, M.D.
Endocrinology, Diabetes & Metabolism Physician · Menlo Park, CA
Jien Shim, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Menlo Park, California, and NPI 1275875957, issued on Mar 20, 2013. Check the license (California A148949, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jien Shim
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A148949 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1300 Crane St, Menlo Park, CA 94025
- Phone
- (888) 924-1036
- Enumerated
- Mar 20, 2013
- Record last updated
- Apr 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20190731001703); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1300 Crane St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hui Chen, M.D.Diagnostic Radiology Physician1275704371
- Victoria Chen, MDInternal Medicine Physician1073705067
Verify Jien Shim in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A148949Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,214 Medicare Part D claims for 377 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 40% of claims.
Most prescribed
- Alendronate Sodium246 claims
- Levothyroxine Sodium227 claims
- Mounjaro124 claims
- Metformin Hcl121 claims
- Ozempic107 claims
- Metformin Hcl Er100 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
- University Healthcare AllianceMenlo Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jien Shim among 1,131 endocrinology, diabetes & metabolism physician records in California
Jien Shim, 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 2013, is newer than 77% of them.
- NPI issued2013 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2013 · median 2003 among the 779 with a school on file
- Record last updated2024 · 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).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Menlo Park → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Peter Sklarin, MDMenlo Park, CA 940251760446496
- Robert Alloo, MDLos Altos, CA 940221508943440
- Martin Stein, M. D.Portola Valley, CA 940281871901397
- Helen Lau, MDDaly City, CA 940151235452871
- Chengyu Xu, M.D.Daly City, CA 940151669600086
- Tyler Aguinaldo, MDBurlingame, CA 940101306811906
- Eva Balint, M.D.Mountain View, CA 940401669578951
- Sumbul Beg, M.D.Burlingame, CA 940101437127560
Common questions
What is Jien Shim, M.D.'s NPI number?
Jien Shim, M.D.'s National Provider Identifier (NPI) is 1275875957, issued on Mar 20, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Jien Shim, M.D. located?
The NPPES record lists a practice address at 1300 Crane St, Menlo Park, CA, 94025. Phone: (888) 924-1036. Providers update this record themselves, so call before visiting.
How can I verify Jien Shim, M.D.'s license?
NPPES lists California license number A148949, 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 Jien Shim, M.D. prescribe under Medicare Part D?
In 2024, Jien Shim, M.D. had 2,214 Medicare Part D claims for 377 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.