Michael Cao
Emergency Medicine Physician · Chino, CA
Michael Cao is an emergency medicine physician with a practice address in Chino, California, and NPI 1649638628, issued on Feb 4, 2016. Check the license (California 20A15412, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Cao
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A15412 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5451 Walnut Ave, Chino, CA 91710
- Phone
- (909) 464-8600
- Enumerated
- Feb 4, 2016
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170509000569); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 5451 Walnut Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashraf Abdel-KerimEmergency Medicine Physician1396961538
- Udhaya AeletyFamily Medicine Physician1740815943
- Ahmet AhmadiStudent in an Organized Health Care Education/Training Program1043199532
- Brian Ahn, D.O.Student in an Organized Health Care Education/Training Program1265849749
- Randall Allred, D.O.Student in an Organized Health Care Education/Training Program1629427703
- Harikrishna Ambati, MDFamily Medicine Physician1154998730
Verify Michael Cao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A15412Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average emergency medicine physician in 2024
655 Medicare Part D claims for 474 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 43 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass52 claims
- Azithromycin49 claims
- Cephalexin44 claims
- Prednisone43 claims
- Triamcinolone Acetonide33 claims
- Tramadol Hcl30 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
- Southern California Permanente Medical GroupHarbor City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Cao among 7,751 emergency medicine physician records in California
Michael Cao is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 75% of them.
- NPI issued2016 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2015 · median 2011 among the 4,560 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 emergency medicine physician records list a practice address in Chino
They are 14 of the 1,097 NPPES records with a practice address in Chino, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Chino → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Ashraf Abdel-KerimChino, CA 917101396961538
- Martin Carrillo, M.D.Chino, CA 917101861436339
- Douglas Cochrane, M.D.Chino, CA 917101417991811
- Jose Diaz, M.D.Chino, CA 917101306880836
- Pranav Kachhi, M.D.Chino, CA 917101801836606
- Khoa Luong, D.O.Chino, CA 917101649253691
- Ashok Madahar, M.D.Chino, CA 917101902846710
- Jason Mathews, DOChino, CA 917101316353865
Common questions
What is Michael Cao's NPI number?
Michael Cao's National Provider Identifier (NPI) is 1649638628, issued on Feb 4, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Michael Cao located?
The NPPES record lists a practice address at 5451 Walnut Ave, Chino, CA, 91710. Phone: (909) 464-8600. Providers update this record themselves, so call before visiting.
How can I verify Michael Cao's license?
NPPES lists California license number 20A15412, 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 Michael Cao prescribe under Medicare Part D?
In 2024, Michael Cao had 655 Medicare Part D claims for 474 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.