James Chae-Chon Son, M.D.
Internal Medicine Physician · Santa Clara, CA
James Chae-Chon Son, M.D. is an internal medicine physician with a practice address in Santa Clara, California, and NPI 1972535680, issued on Jul 6, 2006. Check the license (California A055194, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Chae-Chon Son
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A055194 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1150 Scott Blvd Ste B3, Santa Clara, CA 95050
- Phone
- (408) 261-7245
- Enumerated
- Jul 6, 2006
- Record last updated
- Nov 28, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (408) 261-7249
- Medicaid ID
- 00A551940 CA
- Medicare enrollment
- Enrolled (PECOS I20120202000696); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify James Chae-Chon Son in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A055194Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,529 Medicare Part D claims for 130 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium215 claims
- Losartan Potassium164 claims
- Amlodipine Besylate148 claims
- Metformin Hcl115 claims
- Omeprazole66 claims
- Tamsulosin Hcl43 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.
James Chae-Chon Son among 17,696 internal medicine physician records in California
James Chae-Chon Son, 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 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
- Graduated1992 · median 2004 among the 11,065 with a school on file
- Record last updated2011 · 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).
140 internal medicine physician records list a practice address in Santa Clara
They are 140 of the 3,436 NPPES records with a practice address in Santa Clara, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Clara → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ki Cho, M.D.Santa Clara, CA 950501225122880
- Yoon Cho, M.D.Santa Clara, CA 950501447330394
- Hessam Noralahi, MDSanta Clara, CA 950501306875596
- Curtis Rollins, M.D., D.M.D.Santa Clara, CA 950501265548382
- Anthony Saglimbeni, M.D.Santa Clara, CA 950501922053776
- Khaliq Shah, M.D.Santa Clara, CA 950501568479327
- Emily Cabebe, MDSanta Clara, CA 950511356307474
- Saroja Dandamudi, M.D.Santa Clara, CA 950511891768826
Common questions
What is James Chae-Chon Son, M.D.'s NPI number?
James Chae-Chon Son, M.D.'s National Provider Identifier (NPI) is 1972535680, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Chae-Chon Son, M.D. located?
The NPPES record lists a practice address at 1150 Scott Blvd Ste B3, Santa Clara, CA, 95050. Phone: (408) 261-7245. Providers update this record themselves, so call before visiting.
How can I verify James Chae-Chon Son, M.D.'s license?
NPPES lists California license number A055194, 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 James Chae-Chon Son, M.D. prescribe under Medicare Part D?
In 2024, James Chae-Chon Son, M.D. had 1,529 Medicare Part D claims for 130 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.