Shao-Jen Chang, M.D.
Internal Medicine Physician · Huntsville, TX
Shao-Jen Chang, M.D. is an internal medicine physician with a practice address in Huntsville, Texas, and NPI 1184797847, issued on Nov 17, 2006. Check the license (Texas K3891, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Shao-Jen Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- K3891 TX
Self-reported in NPPES; status is on the state search - Practice location
- 123 Medical Park LN Ste A, Huntsville, TX 77340
- Phone
- (936) 291-2116
- Enumerated
- Nov 17, 2006
- Record last updated
- Feb 9, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (936) 435-7824
- Medicare enrollment
- Enrolled (PECOS I20070607000453); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 123 Medical Park LN Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lane Aiena, MDFamily Medicine Physician1366855470
- Lisa Alicea, MDFamily Medicine Physician1689297202
- Robert Fernandez, MDFamily Medicine Physician1710985536
- David Knuth, MDFamily Medicine Physician1982602793
- Susan McCormick, PA-CPhysician Assistant1194381459
- Mary Rosenquist, D.O.Family Medicine Physician1700939311
Verify Shao-Jen Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license K3891Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,816 Medicare Part D claims for 705 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 35 claims were for opioids.
Most prescribed
- Atorvastatin Calcium456 claims
- Levothyroxine Sodium309 claims
- Amlodipine Besylate274 claims
- Losartan Potassium256 claims
- Methylprednisolone247 claims
- Meloxicam224 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): 89.2 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).
Industry payments in 2024: $751.08
30 payments; by number, the most common kind was food and beverage; the largest payer was Supernus Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Huntsville Family Medicine, LLPHuntsville, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shao-Jen Chang among 9,175 internal medicine physician records in Texas
Shao-Jen Chang, 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1995 · median 2004 among the 6,088 with a school on file
- Record last updated2012 · 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).
15 internal medicine physician records list a practice address in Huntsville
They are 15 of the 505 NPPES records with a practice address in Huntsville, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Huntsville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mir Ali Khan, D.O.Huntsville, TX 773401831290923
- Peter Ang, M.D.Huntsville, TX 773401134186331
- Ali Bhuriwala, M.D.Huntsville, TX 773401386714871
- Darnel Durand, M.D.Huntsville, TX 773401992984272
- David FicklenHuntsville, TX 773401356347603
- John Hines, MDHuntsville, TX 773401043313141
- Premswarup Immaraj, M.D.Huntsville, TX 773401356377915
- Nabeel Khan, M.D.Huntsville, TX 773401144218066
Common questions
What is Shao-Jen Chang, M.D.'s NPI number?
Shao-Jen Chang, M.D.'s National Provider Identifier (NPI) is 1184797847, issued on Nov 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Shao-Jen Chang, M.D. located?
The NPPES record lists a practice address at 123 Medical Park LN Ste A, Huntsville, TX, 77340. Phone: (936) 291-2116. Providers update this record themselves, so call before visiting.
How can I verify Shao-Jen Chang, M.D.'s license?
NPPES lists Texas license number K3891, 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 Shao-Jen Chang, M.D. prescribe under Medicare Part D?
In 2024, Shao-Jen Chang, M.D. had 6,816 Medicare Part D claims for 705 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Shao-Jen Chang, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.2 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.