Mason Marcus, MD
Clinical Cardiac Electrophysiology Physician · Dallas, TX
Mason Marcus, MD is a clinical cardiac electrophysiology physician with a practice address in Dallas, Texas, and NPI 1003300617, issued on Jun 18, 2018. Check the license (Texas T5387, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mason Marcus
- Credential
- MD
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License numbers
- T5387 TX
MD2026-0339 NM
276344 MA
Self-reported in NPPES; status is on the state search - Practice location
- 5323 Harry Hines Blvd, Dallas, TX 75390
- Phone
- (214) 645-8000
- Enumerated
- Jun 18, 2018
- Record last updated
- Jun 15, 2026
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 234 in Texas → Look up another NPI →
Also registered at 5323 Harry Hines Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mason Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license T5387Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average clinical cardiac electrophysiology physician in 2024
66 Medicare Part D claims for 33 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin14 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: $800.02
9 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 3,167 providers of this specialty with any payment received $10,651.37 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.
Mason Marcus among 234 clinical cardiac electrophysiology physician records in Texas
Mason Marcus, MD is one of 234 clinical cardiac electrophysiology physician records with a practice address in Texas. 98% 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 98% of them.
- NPI issued2018 · 98% of these records are older, under 1% newer
- In a Medicare fileYes · 98% of these records are
- In the CMS Doctors and Clinicians fileNo · 91% of these records are
- Record last updated2026 · 29% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0001X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Cardiac Electrophysiology Physician providers in Texas
There are 234 clinical cardiac electrophysiology physician records in Texas.
All 234 in Texas → Every provider in Dallas → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Mark Link, M.D.Dallas, TX 753901891766986
- Nimesh Patel, M.D.Dallas, TX 753901790084283
- Anna Rosenblatt, MDDallas, TX 753901932554284
- Kamala Tamirisa, MDDallas, TX 753901861490955
- Mohammad Shaar, M.D.Dallas, TX 752461760915789
- Peter Wells, MDDallas, TX 752461790733103
- Russell Canham, M.D.Dallas, TX 752371629288246
- Sunita Koshy-Nesbitt, MDDallas, TX 752351972704690
Common questions
What is Mason Marcus, MD's NPI number?
Mason Marcus, MD's National Provider Identifier (NPI) is 1003300617, issued on Jun 18, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mason Marcus, MD located?
The NPPES record lists a practice address at 5323 Harry Hines Blvd, Dallas, TX, 75390. Phone: (214) 645-8000. Providers update this record themselves, so call before visiting.
How can I verify Mason Marcus, MD's license?
NPPES lists Texas license number T5387, 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 Mason Marcus, MD prescribe under Medicare Part D?
In 2024, Mason Marcus, MD had 66 Medicare Part D claims for 33 beneficiaries; the average among clinical cardiac electrophysiology physician prescribers was 1,710. 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.