Terence Tsun-Tchi Chiu, MD
Gastroenterology Physician · Downey, CA
Terence Tsun-Tchi Chiu, MD is a gastroenterology physician with a practice address in Downey, California, and NPI 1427083229, issued on Jul 11, 2006. Check the license (California A61193, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Terence Tsun-Tchi Chiu
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A61193 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9353 Imperial Hwy, Downey, CA 90242
- Phone
- (562) 657-4292
- Enumerated
- Jul 11, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (562) 657-4255
- Medicare enrollment
- Enrolled (PECOS I20040324001850); accepts Medicare assignment
- Medical or professional school
- Warren Alpert Medical School Of Brown University, 1994
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 9353 Imperial Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Theresa Ammermann, NPFamily Nurse Practitioner1750594131
- Rajeev Attam, MDGastroenterology Physician1184694309
- Bryan Ballard, PTPhysical Therapist1851515126
- Quennie Basa, PHYSICAL THERAPISTOrthopedic Physical Therapist1043415235
- Hilarie Beattie, PAPhysician Assistant1215053459
- Christie Blondek, PA-C,DMSC,MSPAS,MPHPhysician Assistant1376912311
Verify Terence Tsun-Tchi Chiu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61193Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average gastroenterology physician in 2024
901 Medicare Part D claims for 518 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Gavilyte-C401 claims
- Mesalamine77 claims
- Omeprazole56 claims
- Entecavir54 claims
- Carvedilol38 claims
- Stelara27 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 GroupDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Terence Tsun-Tchi Chiu among 2,140 gastroenterology physician records in California
Terence Tsun-Tchi Chiu, MD 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1994 · 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 Downey → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Rajeev Attam, MDDowney, CA 902421184694309
- Gareth Dulai, MDDowney, CA 902421164457883
- Michelle Vu, M.D.Downey, CA 902421164715439
- Steven Weiss, MDDowney, CA 902421457569162
- Gaurang Chaurushia, MDDowney, CA 902411538126131
- Kevin Dholaria, M.D.Downey, CA 902411629343736
- Ann Lee, M.D.Downey, CA 902411396979126
- Andrew Nguyen, MDDowney, CA 902411154784783
Common questions
What is Terence Tsun-Tchi Chiu, MD's NPI number?
Terence Tsun-Tchi Chiu, MD's National Provider Identifier (NPI) is 1427083229, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Terence Tsun-Tchi Chiu, MD located?
The NPPES record lists a practice address at 9353 Imperial Hwy, Downey, CA, 90242. Phone: (562) 657-4292. Providers update this record themselves, so call before visiting.
How can I verify Terence Tsun-Tchi Chiu, MD's license?
NPPES lists California license number A61193, 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 Terence Tsun-Tchi Chiu, MD prescribe under Medicare Part D?
In 2024, Terence Tsun-Tchi Chiu, MD had 901 Medicare Part D claims for 518 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.