Ronald Chang, M.D.
Hospitalist Physician · Pomona, CA
Ronald Chang, M.D. is a hospitalist physician with a practice address in Pomona, California, and NPI 1861810863, issued on Apr 7, 2014. Check the license (California A141360, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald Chang
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A141360 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1880 N Orange Grove Ave, Pomona, CA 91767
- Phone
- (909) 630-7158
- Enumerated
- Apr 7, 2014
- Record last updated
- Oct 3, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (909) 630-7983
- Medicare enrollment
- Enrolled (PECOS I20180518001965); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1880 N Orange Grove Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shaina AbenojarFamily Nurse Practitioner1952081408
- Patrick AlonzoNurse Practitioner1023869690
- Marie Antonette BaduaFamily Nurse Practitioner1457825754
- Mehdi Baig, M.D.Hospitalist Physician1417524034
- Suzette Barsoum, NPNurse Practitioner1144078981
- Parmida Behmardi, PAPhysician Assistant1265907836
Verify Ronald Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A141360Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average hospitalist physician in 2024
328 Medicare Part D claims for 111 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Furosemide23 claims
- Atorvastatin Calcium18 claims
- Eliquis18 claims
- Amlodipine Besylate16 claims
- Metoprolol Tartrate14 claims
- Tamsulosin Hcl14 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: $41.80
2 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 7,324 providers of this specialty with any payment received $494.84 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
- Hospitalist Corporation OF Inland EmpirePomona, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald Chang among 3,099 hospitalist physician records in California
Ronald Chang, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 61% of them.
- NPI issued2014 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2014 · median 2010 among the 2,505 with a school on file
- Record last updated2018 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Pomona → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Narine Argishti, MDPomona, CA 917671396186565
- Sumati Bavisetty, M.D.Pomona, CA 917671619234960
- Apollo Gulle, M.D.Pomona, CA 917671831341486
- Fahad Khan, M.D.Pomona, CA 917671871938191
- Shauna McGinnis, D.O.Pomona, CA 917671275878514
- Francis Mendez Munduate, M.D.Pomona, CA 917671659614121
- Tobin Panicker, M.D.Pomona, CA 917671215244546
- Roshni Patrick, M.D.Pomona, CA 917671770929143
Common questions
What is Ronald Chang, M.D.'s NPI number?
Ronald Chang, M.D.'s National Provider Identifier (NPI) is 1861810863, issued on Apr 7, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Chang, M.D. located?
The NPPES record lists a practice address at 1880 N Orange Grove Ave, Pomona, CA, 91767. Phone: (909) 630-7158. Providers update this record themselves, so call before visiting.
How can I verify Ronald Chang, M.D.'s license?
NPPES lists California license number A141360, 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 Ronald Chang, M.D. prescribe under Medicare Part D?
In 2024, Ronald Chang, M.D. had 328 Medicare Part D claims for 111 beneficiaries; the average among hospitalist physician prescribers was 521. 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.