Henry Chang, D.O.
Internal Medicine Physician · West Covina, CA
Henry Chang, D.O. is an internal medicine physician with a practice address in West Covina, California, and NPI 1740430289, issued on Sep 21, 2008. Check the license (California 20A10516, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Henry Chang
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A10516 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2707 E Valley Blvd, West Covina, CA 91792
- Phone
- (626) 581-0486
- Enumerated
- Sep 21, 2008
- Record last updated
- Nov 20, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (626) 581-0161
- Medicare enrollment
- Enrolled (PECOS I20100518000490); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2007
- Entity
- Type 1 · individual
Also registered at 2707 E Valley Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Henry Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10516Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average internal medicine physician in 2024
5,437 Medicare Part D claims for 750 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 13 claims were for opioids.
Most prescribed
- Atorvastatin Calcium643 claims
- Losartan Potassium553 claims
- Metoprolol Succinate391 claims
- Amlodipine Besylate314 claims
- Metformin Hcl289 claims
- Tamsulosin Hcl122 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: $917.75
33 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
23 internal medicine physician records list a practice address in West Covina
They are 23 of the 2,450 NPPES records with a practice address in West Covina, and 17,696 internal medicine physician records in California.
All 23 in West Covina → All 17,696 in California → Every provider in West Covina →
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 Henry Chang, D.O.'s NPI number?
Henry Chang, D.O.'s National Provider Identifier (NPI) is 1740430289, issued on Sep 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Henry Chang, D.O. located?
The NPPES record lists a practice address at 2707 E Valley Blvd, West Covina, CA, 91792. Phone: (626) 581-0486. Providers update this record themselves, so call before visiting.
How can I verify Henry Chang, D.O.'s license?
NPPES lists California license number 20A10516, 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 Henry Chang, D.O. prescribe under Medicare Part D?
In 2024, Henry Chang, D.O. had 5,437 Medicare Part D claims for 750 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.