John Charles Isaac, M.D.
Interventional Cardiology Internal Medicine
John Charles Isaac is an Interventional Cardiology Internal Medicine specialist based in Houston, TX with over 32 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
John Charles Isaac, M.D. practices as part of a group interventional cardiology internal medicine specialist practice in Houston, TX. He graduated from University of Texas Southwestern Medical School at Dallas in 1994 and has 32+ years of clinical experience. He regularly sees Medicare patients with hypertension, high cholesterol, and ischemic_heart (per CMS claims data). CMS MIPS quality score: 98.31/100 (2023).
At a glance
- Federal MIPS score higher than 96% of MIPS-scored doctors in Texas
- Virtual visits available — no app or travel required
Older · 3500dNPPES updated 2016-10-25 · verify NPI on CMS · Verify license at Texas Medical Board
Contact & Location
Practice Location
6560 Fannin St Ste 620, Houston, TX 77030-2761
How Does This Doctor Compare?
Based on Medicare data, this doctor scores better than 96% of doctors in Texas on federal quality measures.
MIPS Score
202398.31/100
Texas avg: 79.1 · US avg: 83.6
✓ Higher than most doctors nationally(+14.7 pts)
Top 4% of MIPS-scored doctors in TexasHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Medicare Patients
1,245
Unique beneficiaries
High volumePrescription Recipients
1,398
Patients prescribed
Prescriptions Written
15,992
Total claims
Total Medicare drug cost: $4.21M
Percentile rankings compared against 4,889 reporting peers in Texas.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Ischemic Heart Disease.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+30%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-2%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-4%) — less common here
An irregular, often rapid heartbeat that increases the risk of stroke
US avg: 22%↑ More patients than average (+8%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-3%) — less common here
The heart cannot pump blood efficiently enough to meet the body's needs
US avg: 22.5%↓ Fewer patients than average (-2%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$199.5k received from industry
417 transactions reported in 2024 ·Very High tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to John Charles Isaac's NPI.
Patient Reviews
No patient reviews yet. If you've seen John Charles Isaac, your feedback helps other patients.
Review PolicyAll feedback is moderated before publishing. We verify reviewer identity where possible and enforce a one-review-per-provider policy. Full guidelines →
Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1994
University of Texas Southwestern Medical Center
32 years in practice
Senior practitioner
An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.
Taxonomy: 207RI0011X
Education & Training
University of Texas Southwestern Medical School at Dallas (Class of 1994)
Virtual Interventional Cardiology Care With John Charles Isaac
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with John Charles Isaac for blood pressure monitoring, cholesterol management, follow-up consultations — no travel to Houston required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about John Charles Isaac
Dr. Isaac is listed as active in the NPI registry with telehealth listed in Houston, TX. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (713) 791-1978.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
Is this your profile?
Verify credentials, update practice details, and manage telehealth.
Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact John Charles Isaac
Practice Location
6560 Fannin St Ste 620, Houston, TX 77030-2761
Mailing Address
6560 Fannin St Ste 620, Houston, TX 77030-2761
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers
Interventional Cardiology Internal Medicine in Texas
See allVictor R Lavis, M.D.
Houston, TX
Robert Neil Schnitzler, M.D.
San Antonio, TX
Abdul Ali, M.D.
Houston, TX