John Joseph Mahmarian, MD

Cardiologist in Houston, Texas · NPI 1114957511

John Mahmarian is one of 291 cardiologists practicing in Houston, Texas. John Mahmarian practices with Houston Methodist Specialty Physicians and TMH Physician Associates PLLC.

Registry record (NPPES)

NPI
1114957511
Type
Type 1 · Individual
Primary taxonomy
Internal Medicine, Cardiovascular Disease · 207RC0000X
Address on file
6550 Fannin St
Houston, TX 77030-2717
(713) 441-1100
Enumerated
Jul 3, 2006
Record last updated
Mar 7, 2014
License states listed
TX

Medicare (CMS)

Enrollment
Medicare-enrolled in TX
Cardiovascular Disease (Cardiology)
Revalidation due
No date set by CMS

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Practice locations

More cardiologists in Houston

Updated August 2026. Practice locations and specialty come from the CMS Doctors and Clinicians file, the registry record from NPPES, and enrollment from CMS Medicare enrollment files. NPI records are corrected at the source, through NPPES.