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ZtoMed: Affordable Telemedicine with Precision Medicine

by Sajung Yun

Instantaneous video chatting app to see medical doctors online, paying by minute of usage
San Francisco, CA United States Connected Health Precision Medicine Prevention Affordable Choices challenge Access to Care challenge NOLAHI Challenge - See All

All Team Company Patients Physicians Hospital Partners Mission Innovation Details Supporters Comments Updates

About our project

The problem we solve: As a medical student, I interviewed many patients. I found many of them should have came to the hospital sooner, and also many who did not need to be there at all. At the time, I wished there existed a quick and affordable screening tool to address these issues. Subsequently, while studying for my healthcare management MBA, I learned the best way to bring costs down is to make a near-perfect competitive marketplace and keep the minimum charges low.

About our solution: By creating an Uber-like location-based aggregative online marketplace for doctors and patients that would allow for video consultations charged by the minute, patients could have access to instant medical consultations. In other words, doctors would be accessible in the same manner as an Uber driver; patients could select the doctor of their choice with their finger-tips and start an instant medical consultation – one with affordable fees, as they would only pay per minute used for the consultation.

Progress to date:

ZtoMed is currently available at the iOS app store (for iPhones).

About Our Team

Creator: Sajung Yun

Location: California

Education: Johns Hopkins University

Bio: Sajung is a Johns Hopkins University adjunct professor, currently teaching DNA analysis courses in graduate school from 2017. He has a research contract with National Institutes of Health for conducting mouse & human cells genome engineering using CRISPR-Cas9 for carcinoid tumor. As for data science, he is a Certified Health Data Analyst (CHDA) from AHIMA. He is also a serial entrepreneur (Doctomics & Ztomed) from 2015. He received Ph.D. in biomedical sciences at University of Hawaii at Manoa in 2009. He attended University of Hawaii John A. Burns School of Medicine, M.D. program and completed 121 credits from 2009 to 2014. He received M.B.A. with double concentrations in healthcare management and entrepreneurship from Johns Hopkins Carey Business School while receiving deans scholarship for academic excellence for straight three years in 2018.

Title: Chief Executive Officer

Advanced Degree(s): Ph.D., M.B.A.

About Team Members

Sijung Yun
CTO, Ph.D., M.S.
Biography: Sijung is a co-founder and president at Ztoid. He is an adjunct professor at Johns Hopkins University. He is running Yotta Biomed, LLC as CEO & founder for the last five years. He holds bioinformatics contract scientist position for genomics core & Krause lab, NIDDK, NIH. He performs analysis and consultation on next generation sequencing and computational structural biology. As for genomics, he works on DNA-seq, RNA-seq, ChIP-seq, and single cell analysis. He has graduate training in computational structural biology, molecular dynamics and docking. He invented NGSinForm, an automated app and web-based NGS analysis system and holds provisional patents. He is a software developer in C/C++, PERL, R, TRIMQ, and Discrete Molecular Dynamics. He is a co-director for NIH Biotrac-45 course (2013 ~ 2015): Bioinformatic analysis of next generation sequencing data. He is a director for Biotrac workshops - Advanced RNA-seq, 'R' for research scientists, and Introduction to NGS. He is a lead instructor for FAES BIOF-521 course (2013 ~ present): Bioinformatics for analysis of data generated by next generation sequencing. He received Ph.D. in Physics (Computational) at Boston University. He has postdoctoral training at NCI and NIDDK.
Title: CTO
Advanced Degree(s): Ph.D., M.S.

Patrick Leung
Clinical Medicine Director, M.D., Pharm.D.
Biography: Patrick is Sajung's medical school classmate (John A. Burns School of Medicine). He is a board certified physician in family medicine.
Title: Clinical Medicine Director
Advanced Degree(s): M.D., Pharm.D.

Quang Nguyen
Precision Medicine Director, M.D., Ph.D.
Biography: Quang received PhD in immunology. He has numerous publications in systems biology of cancer genomics. He received M.D. in France.
Title: Precision Medicine Director
Advanced Degree(s): M.D., Ph.D.

Daniel Lee
Advisor, J.D., L.L.M., M.S.
Biography: Daniel has ten years in the legal and private equity field as vice president in private equity firms. He has extensive experiences in finance & strategic transactions. He received MS degree from Johns Hopkins in biotechnology and he was a student of the genome analysis course that Sajung & Sijung taught. JD, Emory University School of Law; LLM, Northwestern University School of Law; MS(c) in Biotech/Bioinformatics Johns Hopkins University; B.A., LL.B., BEng. in Computer Engineering
Title: Advisor
Advanced Degree(s): J.D., L.L.M., M.S.

About Our Company

Ztomed, Inc.

Location: 415 Jackson St.
San Francisco, CA 94111

Founded: 1


Product Stage: Ready

YTD Sales: Working on it

Employees: 3-5

How We Help Patients

Help patients 1. Golden Minutes (AKA Golden Hour for Medical Emergencies) Problem 1 for Patients. • In a medical emergency, patients often do not have 10 minutes until an ambulance arrives. Solution 1 for Patients. • ZtoMed enables patients or patients’ care givers or willing-to-help bystanders start the crucial and basic medical treatment instead of just waiting at the time of golden minutes.  2. Making Affordable Medical Consultations. Problem 2 for Patients. • Getting a medical consultation is expensive.   Solution 2 for Patients.  • ZtoMed’s medical consultation is affordable.  • Contrast to insurances, we are thinking of reducing the minimum charges.  • Many medical problems don’t require extensive workups.  • Then charging by each minute could be a good way to keep the costs low. 3. Making Easily Accessible Medical Care. Problem 3 for Patients. • Doctors are not easily accessible people.  Solution 3 for Patients.  * ZtoMed enables 1 click talk to a doctor within 10

How We Help Physicians

1. Reimbursement Hassle for Physicians Problem 1 for Physicians. * It takes a long time and a great deal of effort for physicians to get reimbursed for their services from insurance companies.  • Especially for Medicare and Medicaid, physicians get reimbursed not full amounts they requested. • Physician’s main job is to take care of patients. Why physicians waste their time and energy in unnecessary administrative works?  Solution 1 for Physicians. * In ZtoMed, doctors get paid right after the each consultation for 90% of the total charges as ZtoMed collects 10% fee.  * As physicians set their own charges in ZtoMed, if physicians wants certain amount of payments, then all they need to do is to charge 110% of that amount. 2. Getting More Patients  Problem 2 for Physicians. * Newly graduated physicians and newly moved doctors in town often don’t have enough patients to be able to sustain the clinic. They need to get more patients.  Solution 2 for Physicians. * ZtoMed is a location based app. When patients click “Map View” icon, then they see nearby available physicians. They can start instant video chat or schedule to see the doctor in person in her or his clinic. By this way, they can increase the number of their patients. 3. Collaboration among Physicians. Problem 3 for Physicians. • Medical treatment regimens often require collaboration among multiple doctors.  • Often, a patient sees not just one but a few physicians like one internal medicine doctor, one cardiologist, and one ophthalmologist.  • If another doctor prescribed one medication and it conflicts with another doctor’s current treatment plan, it is not easy to cancel the medication another doctor prescribed.  Solution3 for Physicians. * ZtoMed version 2 will enable multi-doctor consultations with a patient while the doctors get properly compensated.

How We Help Hospitals

1. The Emergency Room Utilization. Problem 1 for Hospital.  • The Emergency Room is often utilized by the wrong patients. • Although ERs triage and treat non-urgent patients later, they eventually have to treat the patients who don’t need to be there.  • That is waste of resources. Solution 1 for Hospital. • ZtoMed could be used as a screening tool.  • ZtoMed’s physicians can advise non-urgent patients to stay home and get treated with over the counter medications. • Therefore, ER will be filled with absolutely necessary patients. 2. Reducing Readmission Rate Problem 2 for Hospital. • For many diseases, hospital readmission rates are high. • Just as an example, 20% of heart failure hospitalized patients were readmitted within 30 days in 2011.  Solution 2 for Hospital. • ZtoMed allows prompt communications between clinicians and patients. • As physicians could recognize early symptoms better than patients, more patients can get treated in their clinic rather than hospitalized setting.  3. Collaboration among multiple doctors within the hospital Problem 3 for Hospital • Collaboration among multiple doctors are necessary but those calls are not properly compensated financially. Specialists often not get paid by answering a quick phone call from fellow doctors. Solution 3 for Hospital • When using ZtoMed, every single medical advices get properly compensated financially. • It will lead to better collaborations within the hospital.

How We Help Partners

1. Sales Pitch Opportunity for Pharma and Medical Device Companies Problem1 for Partners. • It is a big hassle to bring doctors to sales pitch places. Solution1 for Partners. • As ZtoMed’s physicians charge by minutes, sales person could limit the payment within legal boundaries while doing quick elevator pitch. 2. Drug Sales Pitch to Patients Problem2 for Partners. • TV and newspaper commercials are not specifically targeted enough. Solution2 for Partners. • ZtoMed would allow drug companies to create their own category. • Drug companies could do the sales pitch directly to patients.  3. Clinical trials subject recruitment Problem3 for Partners. • Pharma companies need to recruit clinical trials subjects and often it is challenging. Solution3 for Partners. • Pharma companies could recruit clinical trials subjects with ZtoMed 4. (Healthcare) Staffing Agency Problem4 for Partners * Especially, it is hard to find nurses.  Solution4 for Partners * ZtoMed could be used as an advertising platform to find medical staffs.

Challenge Mission

How We Address the Mission of The Challenge(s)

Access to Care Challenge
* Cost of care: ZtoMed charges by each minute. For an example of 5 minute consultation, if a doctor charges $300 per hour, the patient only needs to pay $25 total.
* Limited transportation to services: ZtoMed is a location based telemedicine app so transportation is not needed. If a visit is needed, the doctor will be nearby so taxi costs would be minimal.
* Insurance hassle (lack of insurance): As in above example, patients basically paying current standard copay amount ($25) without any health insurance.
* Language barrier: ZtoMed version 2 will enable 3 people video talk for a patient, a doctor, and a medical interpreter if needed.
* Difficulty of getting appointment: As ZtoMed doctors decide their own charges, so they will be readily there to take their patients.

Affordable Choices Challenge
* Easy access from the app with affordability will lead to preventive medicine.
* Precision medicine is integrated in ZtoMed for preventive medicine.

New Orleans and Our Company

We are planning to recruit many local New Orleans private practice physicians. They can use ZtoMed to get more local patients into their clinic. Also, when their existing patients ask questions, the physicians can be adequately compensated for their phone consultations using ZtoMed.

Innovation Details

Intellectual Property Summary

Provisional patents have been filed.

Clinical Information


Regulatory Status


How we will use the funds raised

Monthly: $8340

Total for the first four months: $33360                                                             



Employees => $4440 per month

  - Front end developer  

$1500 per month

  - Back end developer  

$1500 per month

  - One sales person      

$200 per month

  - One customer rep     

$180 per month

  - Project manager          

$280 per month  

  - CEO                            

$480 per month

  - CTO                            

$300 per month



Operational => $3650 per month

  - Sales and Marketing  

$1000 per month

  - Recruitment of doctors and patients  

$2500 per month

  - Office space

$120 per month

  - A server  

$30 per month



Admin => $250 per month

  - Accountant

$30 per month

  - Legal consultations

$120 per month (3 hours)

  - Travel

$100 per month 


Thank You

When I (Sajung) was a third year med student (M.D. program in U.S.) on surgical clerkship in a community hospital, one underinsured patient came for inflamed gallbladder. As two the surgeons performing endoscopy (ERCP) refused, we called all other hospitals in the state but got rejections by all. As this hospital was group practice in legal structure, no one could demand attendings. Lastly, she got open-abdomen surgery which she didn't need to. I was about to take off my white coat and give her personal advice of going out of this hospital (against medical advice) and walk into a major hospital ER but another attending (my med school professor) didn't allow it.

One month later, I quit med school and established a startup company (machine learning based medical diagnosis) but wasn't able to get funding even after I made a prototype. In order to learn more about business, I entered a MBA program in healthcare management & entrepreneurship at Johns Hopkins. There, I realized the true issue I wanted to solve was not more accurate diagnosis but access to health care issue. I found medical services will be given as long as providers receive proper compensation right away (providers decide their charges). In order to lower the costs, I cut the minimum unit of payment as small as possible (one minute). That is ZtoMed. ZtoMed will provide easily accessible, instantaneous, and affordable healthcare. Vote for ZtoMed to make this true.




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$ 35,000 goal

Sajung Yun
Chief Executive Officer
Johns Hopkins University

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