Physician Profile
John J. Mahmarian, M.D.
Unclaimed ProfileAbout Dr. Mahmarian
Based in Houston, TX, John J. Mahmarian, M.D. is listed in the NPI registry under cardiovascular disease. John graduated from New York Medical College in 1980. Medicare claims data shows John provided 2,057 services to 1,883 patients. The services billed most often include ct scan of blood vessels of chest with contrast, ct scan of blood vessels and grafts of heart with contrast, and exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (713) 441-1100
- Email not available
Practice Locations
6550 FANNIN ST SMITH TOWER, SUITE 1901
Houston, TX 77030
Conditions Commonly Evaluated or Treated
Within Cardiovascular Disease generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Coronary and ischemic heart disease
Heart failure and cardiomyopathy
Heart rhythm
Symptoms and functional disorders
Valve and structural heart
Vascular and risk factors
Artery & vascular
Heart inflammation
Heart muscle
Heart valves
Vascular disease
Procedures & services
Most searched procedures
Office and noninvasive testing
Advanced imaging
Consultations
Diagnostic testing
Diagnostics
Heart devices
- Biventricular Pacemaker (Cardiac Resynchronization Therapy)
- Implantable Loop Recorder (Cardiac Monitor Implant)
Heart imaging
Heart procedures
Heart rhythm procedures
Imaging
Implants
Recovery & rehabilitation
Vascular imaging
Procedures Most Often Billed to Medicare
2,057 services · 1,883 patients · 18 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ct scan of blood vessels of chest with contrast | Imaging | 71275 |
325 | More than most peers in Cardiovascular Disease |
| Ct scan of blood vessels and grafts of heart with contrast | Imaging | 75574 |
320 | More than most peers in Cardiovascular Disease |
| Nuclear medicine study of heart muscle blood flow by pet | Imaging | 78434 |
135 | More often than most peers in Cardiovascular Disease |
| Nuclear medicine studies of blood flow in heart muscle at rest and with stress with concurrent ct scan | Imaging | 78431 |
135 | More often than most peers in Cardiovascular Disease |
| Nuclear medicine study of heart muscle at rest and with stress and spect | Imaging | 78451 |
63 | More often than most peers in Cardiovascular Disease |
| Analysis of data from ct study of heart blood vessels to assess severity of heart artery disease, with interpretation and report | Imaging | 75580 |
62 | More often than most peers in Cardiovascular Disease |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | Imaging | 78452 |
57 | More often than most peers in Cardiovascular Disease |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | Imaging | 78452 |
40 | More often than most peers in Cardiovascular Disease |
| Nuclear medicine study, spect imaging, 1 area or single acquisition, single day imaging | Imaging | 78803 |
31 | More often than most peers in Cardiovascular Disease |
| Nuclear medicine study of heart muscle at rest and with stress and spect | Imaging | 78451 |
19 | More often than most peers in Cardiovascular Disease |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other cardiologists in Houston 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at New York Medical College 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at New York Medical College 8
Providers who graduated from the same medical school in the same year.
Also performs Ct scan of blood vessels of chest with contrast 8
Providers in TX who bill this service to Medicare most often.
Common questions
What kind of doctor is John J. Mahmarian?
John J. Mahmarian is a cardiologist in Houston, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Cardiovascular Disease”.
NPI registry
What is John J. Mahmarian's address?
John J. Mahmarian is listed at 6550 Fannin St Smith Tower, Suite 1901, Houston, TX 77030. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John J. Mahmarian?
The number on file is (713) 441-1100. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for John J. Mahmarian?
John J. Mahmarian's National Provider Identifier is 1114957511. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John J. Mahmarian train?
John J. Mahmarian attended New York Medical College, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How much experience does John J. Mahmarian have?
John J. Mahmarian has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What procedures does John J. Mahmarian perform?
According to Medicare billing data, John J. Mahmarian performs imaging including ct scan of blood vessels of chest with contrast and ct scan of blood vessels and grafts of heart with contrast; provides treatments such as exercise or drug-induced heart stress test with electrocardiogram with review by physician and exercise or drug-induced heart stress test with electrocardiogram with supervision by physician, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is John J. Mahmarian's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John J. Mahmarian. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.