Tam Thanh Dang, M.D.
Emergency Medicine Physician · Corona, CA
Tam Thanh Dang, M.D. is an emergency medicine physician with a practice address in Corona, California, and NPI 1275824799, issued on May 2, 2011. Check the license (California A141987, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tam Thanh Dang
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A141987 CA
Self-reported in NPPES; status is on the state search - Practice location
- 800 S Main St, Corona, CA 92882
- Phone
- (951) 737-4343
- Enumerated
- May 2, 2011
- Record last updated
- Jul 22, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160624001044); 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 800 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Addo-Yobo, DOEmergency Medicine Physician1821625955
- James Ahn, M.D.Anesthesiology Physician1588641963
- Julie Ahn, PA-CPhysician Assistant1346802543
- Thomas Assali, DOInternal Medicine Physician1598225062
- Cynthia Bailey, P.A.-CPhysician Assistant1316053036
- David Bear, M.D.Emergency Medicine Physician1114033883
Verify Tam Thanh Dang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A141987Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average emergency medicine physician in 2024
346 Medicare Part D claims for 211 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 53 claims were for opioids.
Most prescribed
- Cephalexin29 claims
- Ondansetron Odt27 claims
- Amoxicillin-Clavulanate Potass19 claims
- Albuterol Sulfate Hfa16 claims
- Oxycodone Hcl15 claims
- Oxycodone-Acetaminophen15 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Emergency Physicians OF Orange CountyNewport Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tam Thanh Dang among 7,751 emergency medicine physician records in California
Tam Thanh Dang, M.D. 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 2011, is newer than 60% of them.
- NPI issued2011 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2011 · median 2011 among the 4,560 with a school on file
- Record last updated2016 · 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).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Corona → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Charles Addo-Yobo, DOCorona, CA 928821821625955
- David Bear, M.D.Corona, CA 928821114033883
- Neil Bhutwala, DOCorona, CA 928821316500408
- James Boyd, M.D.Corona, CA 928821184730855
- Joaquin Castillo Marroquin, DOCorona, CA 928821316407323
- Louis Chau, M.D.Corona, CA 928821225144918
- Nancy Chung, MDCorona, CA 928821275577447
- Aakanksha Fenster, M.D.Corona, CA 928821659661163
Common questions
What is Tam Thanh Dang, M.D.'s NPI number?
Tam Thanh Dang, M.D.'s National Provider Identifier (NPI) is 1275824799, issued on May 2, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Tam Thanh Dang, M.D. located?
The NPPES record lists a practice address at 800 S Main St, Corona, CA, 92882. Phone: (951) 737-4343. Providers update this record themselves, so call before visiting.
How can I verify Tam Thanh Dang, M.D.'s license?
NPPES lists California license number A141987, 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 Tam Thanh Dang, M.D. prescribe under Medicare Part D?
In 2024, Tam Thanh Dang, M.D. had 346 Medicare Part D claims for 211 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Tam Thanh Dang, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.