NPPES file of Aug 9, 2026

Tien-Chun Chen, MD

Gastroenterology Physician · Temple City, CA

Tien-Chun Chen, MD is a gastroenterology physician with a practice address in Temple City, California, and NPI 1396005450, issued on May 23, 2012. Check the license (California A154605, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1396005450
Name
Tien-Chun Chen
Credential
MD
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
A154605 CA
Self-reported in NPPES; status is on the state search
Practice location
6271 Rosemead Blvd, Temple City, CA 91780
Phone
(626) 898-4560
Enumerated
May 23, 2012
Record last updated
Nov 23, 2023
Fax
(626) 898-4561
Medicare enrollment
Enrolled (PECOS I20180818000125); accepts Medicare assignment
Medical or professional school
University Of Texas Southwestern Medical School At Dallas, 2012
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 6271 Rosemead Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Andy ChowPsychiatric/Mental Health Nurse Practitioner1336807288
  2. Unknown Lianna, NPPrimary Care Nurse Practitioner1881415214
  3. Ken Nguyen, M.D.Gastroenterology Physician1205193828

Verify Tien-Chun Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A154605
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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16% more Medicare Part D claims than the average gastroenterology physician in 2024

941 Medicare Part D claims for 484 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.

  1. Tien-Chun Chen941
  2. Specialty average811

Most prescribed

  1. Gavilyte-G195 claims
  2. Pantoprazole Sodium183 claims
  3. Omeprazole79 claims
  4. Peg-3350 And Electrolytes60 claims
  5. Linzess55 claims
  6. Vemlidy55 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: $1,330.97

73 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Tien-Chun Chen$1,330.97
  2. Specialty average$5,015.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

2 hospitals and group practices

  1. Genesis Healthcare Partners PCSan Gabriel, CA
  2. Ridgecrest Regional HospitalRidgecrest, CA · Critical Access Hospitals

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).

Tien-Chun Chen among 2,140 gastroenterology physician records in California

Tien-Chun Chen, 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 2012, is newer than 77% of them.

  • NPI issued2012 · 77% of these records are older, 20% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated2012 · median 2002 among the 1,538 with a school on file
  • Record last updated2023 · 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.

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Ken Nguyen, M.D.Temple City, CA 917801205193828
  2. Robert Mehler, M.D.San Gabriel, CA 917761730259243
  3. Dana Pan, MDSan Gabriel, CA 917761265842934
  4. Chester Zahn, MDSan Gabriel, CA 917761639146442
  5. Basim Abdelkarim, MDUpland, CA 917861932217544
  6. Chuang Hung, M.D.Upland, CA 917861619049749
  7. Kevin Jenkins, DOUpland, CA 917861730276163
  8. Camron Kiafar, D.O.Upland, CA 917861831299254

Common questions

What is Tien-Chun Chen, MD's NPI number?

Tien-Chun Chen, MD's National Provider Identifier (NPI) is 1396005450, issued on May 23, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Tien-Chun Chen, MD located?

The NPPES record lists a practice address at 6271 Rosemead Blvd, Temple City, CA, 91780. Phone: (626) 898-4560. Providers update this record themselves, so call before visiting.

How can I verify Tien-Chun Chen, MD's license?

NPPES lists California license number A154605, 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 Tien-Chun Chen, MD prescribe under Medicare Part D?

In 2024, Tien-Chun Chen, MD had 941 Medicare Part D claims for 484 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.