Jyh C. Chang, M.D.
Internal Medicine Physician · Baldwin Park, CA
Jyh C. Chang, M.D. is an internal medicine physician with a practice address in Baldwin Park, California, and NPI 1346259595, issued on Aug 5, 2006. Check the license (California A46003, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jyh C. Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A46003 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4318 Maine Ave Ste A, Baldwin Park, CA 91706
- Phone
- (626) 962-5141
- Enumerated
- Aug 5, 2006
- Record last updated
- Jan 13, 2026
- Fax
- (626) 338-4191
- Medicaid IDs
- GR0071680 CA
00A460031 CA - Medicare enrollment
- Enrolled (PECOS I20050602000231); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Verify Jyh C. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A46003Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
93% more Medicare Part D claims than the average internal medicine physician in 2024
6,145 Medicare Part D claims for 498 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 51 claims were for opioids.
Most prescribed
- Atorvastatin Calcium432 claims
- Metformin Hcl397 claims
- Losartan Potassium245 claims
- Rosuvastatin Calcium239 claims
- Omeprazole202 claims
- Amlodipine Besylate200 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.
Industry payments in 2024: $261.75
7 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Jyh C Chang MD Professional CorporationBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
56 internal medicine physician records list a practice address in Baldwin Park
They are 56 of the 1,055 NPPES records with a practice address in Baldwin Park, and 17,696 internal medicine physician records in California.
All 56 in Baldwin Park → All 17,696 in California → Every provider in Baldwin Park →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Jyh C. Chang, M.D.'s NPI number?
Jyh C. Chang, M.D.'s National Provider Identifier (NPI) is 1346259595, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jyh C. Chang, M.D. located?
The NPPES record lists a practice address at 4318 Maine Ave Ste A, Baldwin Park, CA, 91706. Phone: (626) 962-5141. Providers update this record themselves, so call before visiting.
How can I verify Jyh C. Chang, M.D.'s license?
NPPES lists California license number A46003, 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 Jyh C. Chang, M.D. prescribe under Medicare Part D?
In 2024, Jyh C. Chang, M.D. had 6,145 Medicare Part D claims for 498 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.