Allen Chang, MD
Emergency Medicine Physician · Tracy, CA
Allen Chang, MD is an emergency medicine physician with a practice address in Tracy, California, and NPI 1588976567, issued on Jul 8, 2010. Check the license (California C143700, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Allen Chang
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- C143700 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1420 N Tracy Blvd, Tracy, CA 95376
- Phone
- (209) 835-1500
- Enumerated
- Jul 8, 2010
- Record last updated
- Oct 1, 2022
- Medicare enrollment
- Enrolled (PECOS I20210827001736); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 2010
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1420 N Tracy Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Veronica Alfaro, MSN, APRN, FNP-CFamily Nurse Practitioner1396423505
- Paul Anderson, PAEmergency Medicine Physician1184605396
- Jennifer Bailey, MDEmergency Medicine Physician1336423516
- Kevin Barnwell, PAPhysician Assistant1740804665
- Ashley Chow, PHARMDPharmacist1790305639
- Jerrett ChowFamily Nurse Practitioner1801604079
Verify Allen Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C143700Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average emergency medicine physician in 2024
192 Medicare Part D claims for 127 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 16 claims were for opioids.
Most prescribed
- Albuterol Sulfate Hfa22 claims
- Prednisone19 claims
- Cephalexin15 claims
- Hydrocodone-Acetaminophen12 claims
- Ofloxacin12 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: $17.88
1 payment: food and beverage; the largest payer was Agile Therapeutics, Inc. The 12,335 providers of this specialty with any payment received $953.79 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
- Permanente Medical Group IncRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allen Chang among 7,751 emergency medicine physician records in California
Allen Chang, MD 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 2010, is newer than 58% of them.
- NPI issued2010 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2010 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 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 Tracy
They are 14 of the 1,864 NPPES records with a practice address in Tracy, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Tracy → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Paul Anderson, PATracy, CA 953761184605396
- Jennifer Bailey, MDTracy, CA 953761336423516
- Janice Crawford, MDTracy, CA 953761134110554
- Phoebe Lee, M.D.Tracy, CA 953761376837021
- Amandeep Sharma, NPTracy, CA 953761639978372
- Eileen Sicangco, MDTracy, CA 953761780876193
- Angadpreet Sidhu, MEDICAL STUDENTTracy, CA 953761396246229
- Andy Su, MDTracy, CA 953761225029440
Common questions
What is Allen Chang, MD's NPI number?
Allen Chang, MD's National Provider Identifier (NPI) is 1588976567, issued on Jul 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Allen Chang, MD located?
The NPPES record lists a practice address at 1420 N Tracy Blvd, Tracy, CA, 95376. Phone: (209) 835-1500. Providers update this record themselves, so call before visiting.
How can I verify Allen Chang, MD's license?
NPPES lists California license number C143700, 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 Allen Chang, MD prescribe under Medicare Part D?
In 2024, Allen Chang, MD had 192 Medicare Part D claims for 127 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.