Derek M. Tang, M.D.
Gastroenterology Physician · Anaheim, CA
Derek M. Tang, M.D. is a gastroenterology physician with a practice address in Anaheim, California, and NPI 1487966727, issued on Jul 1, 2010. Check the license (California A140340, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek M. Tang
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- A140340 CA
MT197564 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3440 E LA Palma Ave, Anaheim, CA 92806
- Phone
- (714) 644-2000
- Enumerated
- Jul 1, 2010
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 203BI0300X PA
- Medicare enrollment
- Enrolled (PECOS I20161010000055); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 3440 E LA Palma Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Abrantes, MDNeonatal-Perinatal Medicine Physician1861438889
- David Alvarez, MDDiagnostic Radiology Physician1255448924
- Marithel Arambulo, MSN RNC-OB PHNRegistered Nurse1174329551
- Salli AzizHospitalist Physician1841720604
- Ricardo Bardales MendozaInternal Medicine Physician1801103130
- Sharrise Boop, MSWSocial Worker1134643489
Verify Derek M. Tang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A140340Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% more Medicare Part D claims than the average gastroenterology physician in 2024
961 Medicare Part D claims for 420 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Gavilyte-C208 claims
- Pantoprazole Sodium125 claims
- Omeprazole105 claims
- Mesalamine57 claims
- Lubiprostone43 claims
- Azathioprine40 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 GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek M. Tang among 2,140 gastroenterology physician records in California
Derek M. Tang, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% 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 72% of them.
- NPI issued2010 · 72% of these records are older, 26% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2010 · median 2002 among the 1,538 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Anaheim → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Bijal Surti, M.D.Anaheim, CA 928061780841882
- Kathy Akashi, MDAnaheim, CA 928071952472862
- Amit Bhanvadia, M.D.Anaheim, CA 928051861751083
- Theodore Durbin, MDAnaheim, CA 928071194873034
- J. Egan, MDAnaheim, CA 928071114075082
- Stanford Gertler, MDAnaheim, CA 928071508937558
- Andrew Giap, MDAnaheim, CA 928071578634507
- Louis Hernandez, MDAnaheim, CA 928071780755603
Common questions
What is Derek M. Tang, M.D.'s NPI number?
Derek M. Tang, M.D.'s National Provider Identifier (NPI) is 1487966727, issued on Jul 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Derek M. Tang, M.D. located?
The NPPES record lists a practice address at 3440 E LA Palma Ave, Anaheim, CA, 92806. Phone: (714) 644-2000. Providers update this record themselves, so call before visiting.
How can I verify Derek M. Tang, M.D.'s license?
NPPES lists California license number A140340, 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 Derek M. Tang, M.D. prescribe under Medicare Part D?
In 2024, Derek M. Tang, M.D. had 961 Medicare Part D claims for 420 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.