Expanded and renovated 
facility & better service
  • Electrocardiograms/EKG
  • Exercise Stress Tests
  • Nuclear Stress Testing
  • PET Stress Testing
  • Echocardiography with color Doppler
  • Stress Echo
  • Holter & MCOT Studies
  • Peripheral Vascular & Carotid Ultrasound
  • Abdominal Aortic Ultrasound
  • Pacemaker & Defibrillator Checks
  • INR/ Coumadin Checks
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The Practice Dr. Timothy M. Marshall started over a decade ago has flourished over the period of time and now his legacy is being continued by his successor Dr. Gundeep Singh MD 

Dr. Gundeep Singh MD, FACC
Board Certified Interventional Cardiologist

Dr. Singh did his initial Medical School from India, and then his residency in Internal Medicine out of the University of Illinois program in Chicago, Illinois. He then further completed his sub specialty training in Cardiology and Interventional Cardiology at the University of Arizona, Sarver Heart Center at Tucson Arizona. He has been in practice in Arizona since his graduation. His scope of practice includes all aspects of general and Interventional Cardiology. He is well respected by his peers and referring physicians and very well liked by his patients. He is currently accepting new patients.

Dr. Jennifer Huang-Tsang DO

Cardiologist
Dr. Huang graduated medical School from Midwestern University, AZ . Completed her residency as well as sub-specialty training in Cardiology at University of Arizona at Sarver Heart Center in Tucson.
She has since been practicing in Tucson and the scope of practice includes all aspects of general Cardiology, preventive Cardiology and general heart failure management.
​Dr. Huang believes in building close relationship with her patients and is passionate about patient education.

Jenna Edwards NP

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I have been a nurse practitioner at Marshall Cardiology since 2015. I received my undergraduate degree from the University of Arizona in 2000 and worked as a cardiac nurse at TMC for 15 years. Once my kids were all in school, I enrolled at Grand Canyon University to pursue my graduate degree. Luckily I was able to stay in cardiology upon graduation and cannot imagine doing anything else. I absolutely love my job, partnering with patients to improve their health and quality of life. Outside of work, I spend as much time as possible with my husband and kids. We love to be outdoors, hiking, traveling, and finding new adventures. I am also active in our church and would eventually like to pursue medical missions. I am thankful for the relationships I have developed with patients at Marshall Cardiology. I feel privileged to be a member of our patients’ care team and a small part their lives. ​
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Marissa Ramirez NP

I completed my education at the University of Arizona and Grand Canyon University to become a healthcare provider. I am passionate about collaborating with patients to generate meaningful improvements in the quality of their lives. I take pride in my responsibility and am grateful for the privilege to be there for patients during what may be a challenging time and share in their joy when health goals are met. As a native of Arizona, I enjoy exploring the mountains in our beautiful backyard by hiking, going for walks with my dog and intend on improving my yoga practice. Spending quality time and making memories with friends and family are some of the most valuable aspects in my life.   

New Patients welcome : Early appointments available ​​

5170 E GLENN STREET, 
SUITE 130 & 160
​TUCSON, AZ 85712
MAIN: (520) 298-7900
FAX: (520)300-7182
MARSHALLCARDIOLOGY@GMAIL.COM