Wesley John Chang, M.D.
Internal Medicine Physician · Anaheim, CA
Wesley John Chang, M.D. is an internal medicine physician with a practice address in Anaheim, California, and NPI 1174593453, issued on Jan 26, 2006. Check the license (California G44205, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Wesley John Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G44205 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6200 E Canyon Rim RD, Anaheim, CA 92807
- Phone
- (714) 974-8130
- Enumerated
- Jan 26, 2006
- Record last updated
- Apr 27, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (714) 974-6811
- Entity
- Type 1 · individual
Also registered at 6200 E Canyon Rim RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Wesley John Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G44205Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% more Medicare Part D claims than the average internal medicine physician in 2024
4,001 Medicare Part D claims for 237 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 105 claims were for opioids.
Most prescribed
- Atorvastatin Calcium330 claims
- Amlodipine Besylate130 claims
- Losartan Potassium122 claims
- Levothyroxine Sodium111 claims
- Metformin Hcl104 claims
- Alprazolam88 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.
The MIPS final score for 2023 (Medicare payment program): 14.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $771.57
22 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.
189 internal medicine physician records list a practice address in Anaheim
They are 189 of the 9,018 NPPES records with a practice address in Anaheim, and 17,696 internal medicine physician records in California.
All 189 in Anaheim → All 17,696 in California → Every provider in Anaheim →
Other internal medicine physician records in California
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- 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 Wesley John Chang, M.D.'s NPI number?
Wesley John Chang, M.D.'s National Provider Identifier (NPI) is 1174593453, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Wesley John Chang, M.D. located?
The NPPES record lists a practice address at 6200 E Canyon Rim RD, Anaheim, CA, 92807. Phone: (714) 974-8130. Providers update this record themselves, so call before visiting.
How can I verify Wesley John Chang, M.D.'s license?
NPPES lists California license number G44205, 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 Wesley John Chang, M.D. prescribe under Medicare Part D?
In 2024, Wesley John Chang, M.D. had 4,001 Medicare Part D claims for 237 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Wesley John Chang, M.D.'s MIPS final score?
The 2023 MIPS final score is 14.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.