Thomas Chang Tan, M.D.
Emergency Medicine Physician · Houston, TX
Thomas Chang Tan, M.D. is an emergency medicine physician with a practice address in Houston, Texas, and NPI 1417189184, issued on Aug 14, 2009. Check the license (Texas N4780, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Thomas Chang Tan
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- N4780 TX
254392 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1515 Holcombe Blvd, Houston, TX 77030
- Phone
- (713) 792-6161
- Enumerated
- Aug 14, 2009
- Record last updated
- Dec 2, 2022
- Medicaid ID
- 215546701 TX
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Also registered at 1515 Holcombe Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas Chang Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N4780Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average emergency medicine physician in 2024
576 Medicare Part D claims for 350 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 101 claims were for opioids.
Most prescribed
- Acetaminophen-Codeine67 claims
- Amoxicillin-Clavulanate Potass47 claims
- Doxycycline Hyclate46 claims
- Ondansetron Odt43 claims
- Cyclobenzaprine Hcl38 claims
- Dicyclomine Hcl33 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Thomas Chang Tan among 4,885 emergency medicine physician records in Texas
Thomas Chang Tan, M.D. is one of 4,885 emergency medicine physician records with a practice address in Texas. 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 2009, is newer than 45% of them.
- NPI issued2009 · 45% of these records are older, 52% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2022 · 55% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
818 emergency medicine physician records list a practice address in Houston
They are 818 of the 61,221 NPPES records with a practice address in Houston, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Houston → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Bentley Bobrow, M.D.Houston, TX 770301528040276
- Jack Butler, M.D.Houston, TX 770301962491035
- Pamela Carmain, M.D.Houston, TX 770301285636266
- Crystal Cassidy, M.D.Houston, TX 770301316948599
- Robert Dickson, MDHouston, TX 770301609866391
- Swapan Dubey, M.D.Houston, TX 770301497756175
- Bhushan Kukkalli, M.D.Houston, TX 770301871579276
- Kelly Larkin, M.D.Houston, TX 770301144205683
Common questions
What is Thomas Chang Tan, M.D.'s NPI number?
Thomas Chang Tan, M.D.'s National Provider Identifier (NPI) is 1417189184, issued on Aug 14, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Chang Tan, M.D. located?
The NPPES record lists a practice address at 1515 Holcombe Blvd, Houston, TX, 77030. Phone: (713) 792-6161. Providers update this record themselves, so call before visiting.
How can I verify Thomas Chang Tan, M.D.'s license?
NPPES lists Texas license number N4780, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Chang Tan, M.D. prescribe under Medicare Part D?
In 2024, Thomas Chang Tan, M.D. had 576 Medicare Part D claims for 350 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Thomas Chang Tan, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.