Mazen Hassan, MD
Internal Medicine Physician · Dallas, TX
Mazen Hassan, MD is an internal medicine physician with a practice address in Dallas, Texas, and NPI 1003311093, issued on Mar 29, 2018. Check the license (Texas S7228, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mazen Hassan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- S7228 TX
Self-reported in NPPES; status is on the state search - Practice location
- 3600 Gaston Ave Ste 550, Dallas, TX 75246
- Phone
- (214) 821-1177
- Enumerated
- Mar 29, 2018
- Record last updated
- Mar 3, 2023
- Medicare enrollment
- Enrolled (PECOS I20211009000059); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2018
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 3600 Gaston Ave Ste 550
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mazen Hassan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S7228Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
73 Medicare Part D claims for 32 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.
Industry payments in 2024: $1,270.96
55 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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
- Healthtexas Provider NetworkDallas, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mazen Hassan among 9,175 internal medicine physician records in Texas
Mazen Hassan, MD 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 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2018 · median 2004 among the 6,088 with a school on file
- Record last updated2023 · 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).
956 internal medicine physician records list a practice address in Dallas
They are 956 of the 36,304 NPPES records with a practice address in Dallas, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Dallas → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Robert Allison, M.D.Dallas, TX 752461750339719
- Uyen-Thi Cao, MDDallas, TX 752461639100555
- Susan Favour, MDDallas, TX 752461205895562
- Linsheng Guo, M.D.Dallas, TX 752461053365510
- Donald Kennerly, MDDallas, TX 752461538124763
- Susan Kohl, MDDallas, TX 752461528098811
- Ruth Krishnan, M.D.Dallas, TX 752461265480685
- Andrew Masica, M.D.Dallas, TX 752461881625440
Common questions
What is Mazen Hassan, MD's NPI number?
Mazen Hassan, MD's National Provider Identifier (NPI) is 1003311093, issued on Mar 29, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mazen Hassan, MD located?
The NPPES record lists a practice address at 3600 Gaston Ave Ste 550, Dallas, TX, 75246. Phone: (214) 821-1177. Providers update this record themselves, so call before visiting.
How can I verify Mazen Hassan, MD's license?
NPPES lists Texas license number S7228, 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 Mazen Hassan, MD prescribe under Medicare Part D?
In 2024, Mazen Hassan, MD had 73 Medicare Part D claims for 32 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.