Ellison Chang, MD
Psychiatry Physician · Riverside, CA
Ellison Chang, MD is a psychiatry physician with a practice address in Riverside, California, and NPI 1508906181, issued on Feb 6, 2007. Check the license (California G67488, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ellison Chang
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G67488 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9990 County Farm RD # S-3, Riverside, CA 92503
- Phone
- (951) 358-4647
- Enumerated
- Feb 6, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040322000993); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Ellison Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G67488Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average psychiatry physician in 2024
2,089 Medicare Part D claims for 158 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Quetiapine Fumarate329 claims
- Divalproex Sodium Er204 claims
- Olanzapine189 claims
- Trazodone Hcl155 claims
- Risperidone143 claims
- Aripiprazole128 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
- County OF RiversideBanning, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellison Chang among 8,673 psychiatry physician records in California
Ellison Chang, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1988 · median 2005 among the 3,295 with a school on file
- Record last updated2007 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
134 psychiatry physician records list a practice address in Riverside
They are 134 of the 13,893 NPPES records with a practice address in Riverside, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Riverside → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Thomas Bowlus, MDRiverside, CA 925031154492072
- Jerry Dennis, M.D.Riverside, CA 925031841344348
- David Dinicola, M.D.Riverside, CA 925031205966082
- Loretta Howitt, MDRiverside, CA 925031972670826
- Neeta Kumari, M.D., MPHRiverside, CA 925031508094830
- Ramesh Patel, M.D.Riverside, CA 925031912044520
- Terry Petersen, M.D.Riverside, CA 925031093873978
- Richard Prather, MDRiverside, CA 925031033207881
Common questions
What is Ellison Chang, MD's NPI number?
Ellison Chang, MD's National Provider Identifier (NPI) is 1508906181, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ellison Chang, MD located?
The NPPES record lists a practice address at 9990 County Farm RD # S-3, Riverside, CA, 92503. Phone: (951) 358-4647. Providers update this record themselves, so call before visiting.
How can I verify Ellison Chang, MD's license?
NPPES lists California license number G67488, 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 Ellison Chang, MD prescribe under Medicare Part D?
In 2024, Ellison Chang, MD had 2,089 Medicare Part D claims for 158 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.