John Joseph Mahmarian, M.D.
Cardiovascular Disease Physician · Houston, TX
John Joseph Mahmarian, M.D. is a cardiovascular disease physician with a practice address in Houston, Texas, and NPI 1114957511, issued on Jul 3, 2006. Check the license (Texas F9767, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Joseph Mahmarian
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- F9767 TX
Self-reported in NPPES; status is on the state search - Practice location
- 6550 Fannin St, Houston, TX 77030
- Phone
- (713) 441-1100
- Enumerated
- Jul 3, 2006
- Record last updated
- Mar 7, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (713) 790-2643
- Medicaid IDs
- 134999510 TX
134999511 TX
134999509 TX
1375250 LA - Medicare enrollment
- Enrolled (PECOS I20051110000207); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1980
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,603 in Texas → Look up another NPI →
Also registered at 6550 Fannin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Horacio Adrogue, MDNephrology Physician1508958000
- Talha Akram, MDStudent in an Organized Health Care Education/Training Program1346180577
- Mahmoud Al Rifai, M.D.Cardiovascular Disease Physician1922456219
- Jaden Aland, MDStudent in an Organized Health Care Education/Training Program1114868213
- James Albright, MDPediatric Otolaryngology Physician1548255805
Verify John Joseph Mahmarian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license F9767Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,693 Medicare Part D claims for 285 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Rosuvastatin Calcium505 claims
- Ezetimibe285 claims
- Carvedilol249 claims
- Losartan Potassium214 claims
- Amlodipine Besylate152 claims
- Atorvastatin Calcium133 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: $91.96
4 payments; by number, the most common kind was food and beverage; the largest payer was Heartflow, Inc. The 16,686 providers of this specialty with any payment received $3,819.56 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 2 group practices
- Houston Methodist Specialty PhysiciansHouston, TX
- Tmh Physician Associates PLLCSugar Land, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Joseph Mahmarian among 1,603 cardiovascular disease physician records in Texas
John Joseph Mahmarian, M.D. is one of 1,603 cardiovascular disease physician records with a practice address in Texas. 88% 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 20% of them.
- NPI issued2006 · 20% of these records are older, 42% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1980 · median 1998 among the 1,219 with a school on file
- Record last updated2014 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Texas
There are 1,603 cardiovascular disease physician records in Texas.
All 1,603 in Texas → Every provider in Houston → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Gregory Appleton, M.D.Houston, TX 770301114927928
- Jaime Benrey, MDHouston, TX 770301003810854
- Michael Bungo, M.D.Houston, TX 770301497756654
- Sayed Feghali, M.D.Houston, TX 770301326040486
- Jorge Garcia-Gregory, MDHouston, TX 770301760486450
- Ihab Hamzeh, MDHouston, TX 770301700886934
- Surendra Jain, MDHouston, TX 770301326036195
- Milton Klein, MDHouston, TX 770301689673568
Common questions
What is John Joseph Mahmarian, M.D.'s NPI number?
John Joseph Mahmarian, M.D.'s National Provider Identifier (NPI) is 1114957511, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Joseph Mahmarian, M.D. located?
The NPPES record lists a practice address at 6550 Fannin St, Houston, TX, 77030. Phone: (713) 441-1100. Providers update this record themselves, so call before visiting.
How can I verify John Joseph Mahmarian, M.D.'s license?
NPPES lists Texas license number F9767, 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 John Joseph Mahmarian, M.D. prescribe under Medicare Part D?
In 2024, John Joseph Mahmarian, M.D. had 2,693 Medicare Part D claims for 285 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.