An Thien Tang, M.D.
Internal Medicine Physician · Houston, TX
An Thien Tang, M.D. is an internal medicine physician with a practice address in Houston, Texas, and NPI 1841357589, issued on Jan 2, 2007. Check the license (Texas M5537, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- An Thien Tang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- M5537 TX
Self-reported in NPPES; status is on the state search - Practice location
- 11978 Westheimer RD Ste B, Houston, TX 77077
- Phone
- (832) 406-4160
- Enumerated
- Jan 2, 2007
- Record last updated
- Mar 5, 2026
- Fax
- (855) 540-2516
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 11978 Westheimer RD Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ucheoma Nwaogwugwu, MDInternal Medicine Physician1720234016
Verify An Thien Tang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M5537Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
28 Medicare Part D claims for 18 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
An Thien Tang among 9,175 internal medicine physician records in Texas
An Thien Tang, M.D. is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 50% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,488 internal medicine physician records list a practice address in Houston
They are 1,488 of the 61,221 NPPES records with a practice address in Houston, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Houston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kelsey Carnahan, MDHouston, TX 770771083140578
- Nidhi Jhaver, M.D.Houston, TX 770771033300850
- Brian Kiss, M.D.Houston, TX 770771801949557
- Ucheoma Nwaogwugwu, MDHouston, TX 770771720234016
- Raina Patel, MDHouston, TX 770771144224544
- Shiraz PiraliHouston, TX 770771366464034
- Melvin Russell, D.O.Houston, TX 770771538239546
- Judi Shaw-Rice, MD, FACP, MMM, CPEHouston, TX 770771437253093
Common questions
What is An Thien Tang, M.D.'s NPI number?
An Thien Tang, M.D.'s National Provider Identifier (NPI) is 1841357589, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is An Thien Tang, M.D. located?
The NPPES record lists a practice address at 11978 Westheimer RD Ste B, Houston, TX, 77077. Phone: (832) 406-4160. Providers update this record themselves, so call before visiting.
How can I verify An Thien Tang, M.D.'s license?
NPPES lists Texas license number M5537, 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 An Thien Tang, M.D. prescribe under Medicare Part D?
In 2024, An Thien Tang, M.D. had 28 Medicare Part D claims for 18 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.