Centralise your health data so you can access it anywhere: MyChart vs Health Data Avatar

The Short Answer

Different by design, MyChart isn't created to fulfil the role of your health vault, it is a workflow for hospitals with a patient-facing interface. Everything you can see is determined by what each healthcare organisation has chosen to make visible, and you can't add your own files. It gives you a window into one particular hospital/appointment records. Health Data Avatar allows you to centralise and manage all your health data: it gives you ownership of your entire health history.

MyChart is a provider-administered portal which fullfills its purpose of a particular clinic sending documents to you as a patient, and it's a patient-facing feature for an Electronic Health Record. It comes with significant documented limitations: it is locked to the Epic network, blocks cross-institution and cross-border data access, prevents patients from directly editing incorrect records, restricts messaging to 500 characters, and excludes an estimated one-third of patients through registration barriers alone.

According to a 2025 peer-reviewed study in the Journal of Medical Internet Research (n=5,651), 32% of non-users cited registration difficulties as a barrier to adoption.

Health Data Avatar (HDA) solves the problems MyChart cannot: it is a patient-owned, secure AI-native, cross-border health data ecosystem that works with any record, from any provider, in any language, anywhere in the world — no institutional affiliation required.

If you have complex, chronic, or cross-border healthcare needs and already heave your data downloaded/printed out, read on. The difference between these two solutions could materially affect the quality of care you receive.

The Scale of the Problem: Why Scattered Records Are a Health Crisis

Imagine arriving at a specialist's office only to be told: "We don't have access to your records from your last provider."You spend the next twenty minutes trying to recall medication doses, allergy histories, and lab results from six months ago. The appointment proceeds on incomplete information.

According to research published in JAMA Internal Medicine (2024), 35% of Medicare beneficiaries see five or more physicians — and even with widespread EHR deployment, 34% of primary care physicians reported they do not always or most of the time receive useful information from specialists about referred patients. Fragmentation is not an IT problem waiting to be solved. It is structural, and it is harming patients right now.

The financial cost reinforces the urgency. Healthcare data fragmentation contributes to an estimated $200 billion in annual waste in the United States alone — much of it driven by duplicate tests ordered because previous results were inaccessible at the point of care. The Office of the National Coordinator for Health IT (ONC) has made patient access to health information a top federal priority precisely because the status quo is indefensible.

And yet the tools patients are given to manage their own records — primarily, provider-administered portals like MyChart — are built around institutional convenience, not patient need.

Part 1: MyChart — Honestly Assessed

What MyChart Is (and What It Was Designed to Do)

MyChart is Epic Systems Corporation's patient-facing portal, deployed by hundreds of healthcare organisations, primarily in North America. It allows patients to view test results, message care teams, schedule appointments, request prescription refills, and access visit summaries within a secure, hospital-administered environment.

Within its designed scope — a patient who receives most of their care within a single Epic-affiliated system and is comfortable with digital tools — it delivers real value. The problem is that its designed scope describes a shrinking minority of actual patients.

For everyone else, the limitations are documented, systemic, and serious.

1. The Registration Barrier That Excludes One in Three

Before a patient can access a single record on MyChart, they must navigate an account activation process that has proven to be a significant — and well-documented — barrier.

A peer-reviewed mixed-methods study published in the Journal of Medical Internet Research (January 2025, n=5,651 patients and caregivers) found that 32% of non-users cited registration difficulties as a barrier to adoption. Two-factor authentication failures, expired activation codes, and limited digital literacy caused many patients to abandon the process entirely.

One patient in the study described their experience directly:

"I have to put all these numbers, whatever it is, and then they say it's not right. Again, I'm putting in the numbers, it's not right. I did it three times — after that it says your time has expired, so come back."

The ONC's own Health IT Playbook corroborates this: as recently as 2017, nearly 1 in 5 individuals who were offered access to their online medical record did not view it because they had no way to access the website. The 2024 HINTS survey data confirms that despite progress, significant disparities persist — particularly for patients in racialized minority groups and those with lower levels of education, as documented in research published in the Journal of the American Medical Informatics Association (JAMIA, 2023).

For elderly patients, carers managing proxy access, and individuals with cognitive impairments, MyChart's activation process is not a minor UX issue. It is a locked door.

2. Incomplete Records: A View, Not a Record

Perhaps the most consequential limitation of MyChart is the gap between what patients expect to see and what is actually available.

The same JMIR 2025 study found that users expressed significant dissatisfaction with limited access to medical history and test results. Patients specifically wanted access to consultation notes, medical images, emergency department results, and a comprehensive medical history — none of which were consistently available in MyChart.

One patient in the study articulated the frustration clearly:

"One thing that would be really nice to have is access to the doctor's notes — like, the notes from your appointment. I tend to try to take my own notes when I'm at clinical appointments but sometimes it's hard because I'm trying to be present in the appointment."

Clinical notes are the narrative of care. Without them, a patient's MyChart record is a collection of data points without clinical context — and as PubMed-indexed research has confirmed, EHRs inadequately capture mental health diagnoses, visits, specialty care, hospitalisations, and medications, raising documented concerns about medical errors and research integrity.

This is not a marginal failure. It is a fundamental structural limitation of institution-controlled portals.

3. The Institutional Silo Problem: Your Data, on Their Terms

Here is MyChart's central architectural flaw: it is a window into a provider's system, not a patient-owned repository.

Everything you can see is determined by what each healthcare organisation has chosen to make visible. Cross-institution record linking requires an active account at every separate institution. As Epic's own documentation confirms, a healthcare organisation must be part of Epic's account-linking network — and if the institution you need is not in that network, its records are invisible to you. Smaller clinics, allied health providers, private practitioners, and virtually all non-US institutions simply do not participate.

The JAMA Internal Medicine research on care fragmentation quantifies the harm of this architecture directly: when physicians lack access to upstream specialist notes, the result is medical errors, unnecessary visits, avoidable hospitalisations, and suboptimal care. The Epic portal model does not solve this problem. In some respects, by creating a false sense of digital completeness, it obscures it.

4. Time-Bound, Friction-Heavy Sharing

For patients who need to share records with a new provider, a second-opinion specialist, or a family carer, MyChart's "Share Everywhere" function generates a one-time share code that is valid only until it is used, for up to 60 minutes, and expires permanently once redeemed. No one can access it again without the patient generating a new code.

For a patient managing care across multiple specialists — let alone one seeking treatment abroad — this is a functionally inadequate sharing model. Security and privacy can be adressed in a more user-friendly way.

5. Inaccurate Records and No Right of Direct Correction

When a MyChart record contains an error, patients cannot correct it themselves. They must petition the institution. And that petition can be rejected.

A 2024 investigative report by News 5 Cleveland documented multiple patients who discovered serious inaccuracies in their MyChart records. One patient, Deb Sweat, found that another patient's surgery had been logged against her record through a clerical error. When she requested correction, the process took over eight months, and a new inaccuracy — stating she had previously suffered a heart attack and stroke — appeared in her record in July 2024. After filing a formal complaint, she discovered her physician had never been contacted by the hospital. University Hospitals ultimately sent a letter declaring her record "accurate and complete" — despite her documented objections.

Other patients in the same report described near-identical experiences, with incorrect diagnoses remaining on record after repeated requests for removal: "UH has added so many diagnoses [inaccurate] on my MyChart and I've asked to have them removed and they still are on there. Frustrating to have to repeatedly tell them it is inaccurate whenever I go to different specialists."

Under the current model, the patient has no power. The institution decides what is true.

6. The 500-Character Messaging Limit

Many healthcare organisations have imposed a 500-character limit on MyChart messages — the equivalent of roughly three and a half tweets — explicitly to keep communications brief. This structurally limits a patient's ability to convey complex or evolving symptoms, and it does so regardless of clinical need.

Gartner Peer Insights reviewers consistently note that MyChart also lacks real-time chat or video consultation capability, restricting its utility for patients requiring more immediate or interactive communication. Response times routinely run to three business days.

7. No Cross-Border or Cross-Lingual Support

For the growing global populations of medical tourists, expatriates, cross-border patients, and migrants navigating new health systems, MyChart offers essentially nothing. There is no cross-lingual summarisation of documents, no ability to upload records from non-Epic providers, and no structural support for health histories that span multiple countries' systems.

According to the ONC's 2024 HINTS data, even within the US, disparities in patient portal access and use persist along lines of race, education, income, and geography. For internationally mobile patients, these barriers are compounded by network exclusion that is essentially total.

Part 2: Health Data Avatar — Built on a Different Premise

Health Data Avatar (HDA) was built in direct response to the question the existing market has failed to answer: What does a health data solution look like if the patient/carer, not the institution, is the primary client?

The answer is structurally different from anything currently available.

The Core Insight: The Patient Is the Only Constant

The AHRQ and multiple peer-reviewed studies confirm that healthcare fragmentation — the experience of care being delivered in disconnected silos — is one of the central causes of preventable medical errors, redundant testing, and avoidable hospitalisations.

The existing response has been to try and connect those silos to each other: interoperability standards, HIEs, TEFCA, FHIR APIs. These are necessary efforts. But they are fundamentally institution-to-institution approaches that leave the patient as a passive recipient of whatever information flows they manage to achieve.

HDA's founding insight is different: patients are the only constant across fragmented healthcare systems. Institutions change. Insurers change. Countries change. Providers retire. But the patient persists — and they deserve a health data infrastructure that persists with them.

Rather than depending on institutional permission, network membership, or system-to-system agreements, HDA provides an independent, patient-owned layer where the patient is the custodian, the editor, and the sharing authority for their own health data.

What HDA Actually Does

Universal document ingestion. Upload almost any format — PDF, image, Word document, plain text, JSON, or FHIR-compatible data. Records from a clinic in Bangkok are as accessible as those from a clinic in Birmingham. Every uploaded file is parsed, securely stored in multiple versions (including the original), and automatically summarised in your chosen language.

Free-form health logs. Add plain-English notes alongside clinical documents — symptom diaries, lifestyle data, wearable exports, caregiver observations. This is the longitudinal health narrative that no institutional portal can generate, because institutions only see the moments you are in their system.

AI-powered semantic search across all your data. Query all your records in natural language through an intelligent chat interface. Ask "What medications have I been prescribed for hypertension?" across every document you have uploaded, in any language, and receive a coherent answer — not a list of PDFs to manually search.

PII detection and selective redaction before sharing. Before exporting or sharing records, HDA's personal identifiable information detection allows you to selectively redact sensitive data. Your sanitised, LLM-ready records can then be shared safely — with AI tools, second-opinion specialists, or family members — on your terms.

Fine-grained, time-bound selective sharing. Secure record sharing via link and password, granting access only to the subset of documents you choose, for as long as you decide. Unlike MyChart's 60-minute one-time share codes, HDA's sharing model gives patients sustained, auditable, revocable access management.

Editable records with personal annotations. Add your own notes directly to documents. Flag discrepancies. Add context. You are not waiting for an institutional committee to decide whether your objection to your own record is valid.

Gap identification. HDA can identify gaps in your health records — surfacing the missing vaccination history, the lapsed specialist follow-up, the undocumented result. This proactive care continuity intelligence does not exist in a passive portal.

Cross-border, cross-lingual, cross-system by design. For patients whose health history does not fit inside one country's system — medical tourists, expats, internationally mobile patients, immigrant populations navigating new health systems — HDA treats cross-border and cross-lingual care as a primary use case, not an afterthought.

Who Needs HDA Most

The patients who stand to gain most from Health Data Avatar are not outliers. They are a large and growing majority:

Chronic illness patients navigating multiple specialists whose records live in different systems. Research published in JAMA Internal Medicine confirms that the fragmentation affecting these patients routinely results in medical errors and avoidable hospitalisations.

Carers and proxy managers responsible for a loved one's health data across multiple providers. The ONC's 2024 data shows proxy and caregiver access to patient portals more than doubled from 24% in 2020 to over 50% by 2024 — reflecting a growing population of carers who need tools that keep pace with their responsibilities.

Medical tourists and cross-border patients, for whom MyChart's US-centric Epic network is essentially irrelevant, and who need to present structured, translated health histories to providers in different countries and languages.

Expats and internationally mobile patients (nomads) who cannot rely on institutional continuity, and who need patient-owned records that travel with them.

Anyone who has ever been handed a stack of printouts at hospital discharge and told to "bring these to your next appointment." Which, at some point, is nearly everyone.

Side-by-Side Comparison for health data centralisation and portability

Feature	MyChart	Health Data Avatar
Data ownership	Institution	Patient
Record sources	Epic network only	Any format, any source, any country, any language
Upload your own documents	No	Yes, 20+ formats, including PDF, DOCX, images, text, JSON, FHIR
Free-form health logs	No	Yes
Multi-language support	Limited	Yes — auto-translation and summarisation
Cross-border interoperability	No	Yes, by design
AI-powered search/query	No	Yes — semantic search across all data
Edit or annotate your records	No	Yes
PII detection and redaction	No	Yes
Selective, time-bound sharing	60-minute one-use codes	Fine-grained, auditable access controls
LLM-ready data export	No	Yes
Works without institutional affiliation	No	Yes
Lifestyle and wearable data	Minimal	Yes
Gap identification	No	Yes
Registration barrier	Significant (32% dropout)	Patient-initiated, no activation codes

Conclusion: MyChart Was Built for Institutions. Health Data Avatar Was Built for You.

Patient portals like MyChart have done genuinely useful work. But as documented by peer-reviewed research, ONC federal data, and thousands of patient accounts, they are constrained by a foundational design choice: they exist to serve institutional workflows, and patients benefit only to the extent that institutional interests align with patient need. Often, they do not.

As the AHRQ notes, effective care coordination requires that all providers involved in a patient's care have access to relevant information at the point of care. The institutional portal model — a separate login for every hospital system, no cross-border support, no patient-controlled editing — is structurally unable to deliver this.

Health Data Avatar is not competing to be the best patient portal. It is offering something that did not previously exist: a patient-owned, AI-native, cross-border health data management ecosystem where the patient is the primary client — not the institution, not the insurer, and not the technology vendor.

Your health data is yours. It should work for you, wherever you are, in whatever language you need, across every provider you have ever seen. That is what Health Data Avatar is built to deliver.

Start managing your health data on your own terms

References and Authority Sources

All claims in this article are sourced from peer-reviewed research, government health agencies, official platform documentation, and verified patient testimony. Sources are linked inline throughout the article and consolidated below.

Government and Federal Health Agencies (.gov)

1. Office of the National Coordinator for Health Information Technology (ONC/ASTP). Individuals' Access and Use of Patient Portals and Smartphone Health Apps, 2024. ASTP Data Brief No. 77. July 2025. https://www.healthit.gov/data/data-briefs/individuals-access-and-use-patient-portals-and-smartphone-health-apps-2024/

2. ONC/ASTP. Health IT Playbook — Chapter 3: Ensure All Patients Can Access and Understand Information.https://www.healthit.gov/playbook/pe/chapter-3/

3. Agency for Healthcare Research and Quality (AHRQ). Care Coordination.https://www.ahrq.gov/ncepcr/care/coordination.html

4. Centers for Disease Control and Prevention (CDC). National Electronic Health Records Survey (NEHRS).https://www.cdc.gov/nchs/nehrs/

Peer-Reviewed Studies (PMC / PubMed / .edu)

5. Vanderhout S, Taneja S, Kalia K, et al. Patient Experiences and Perspectives When MyChart is Introduced in a Large Community Hospital: Mixed Methods Study. Journal of Medical Internet Research. January 23, 2025. https://www.jmir.org/2025/1/e66353

6. Kern LM, Safford MM, Slavin MJ, et al. Care Fragmentation, Care Continuity, and Care Coordination — How They Differ and Why It Matters. JAMA Internal Medicine. 2024 Mar 1;184(3):236–237. https://pmc.ncbi.nlm.nih.gov/articles/PMC10923120/

7. Richwine C, Johnson C, Patel V. Disparities in Patient Portal Access and the Role of Providers in Encouraging Access and Use. Journal of the American Medical Informatics Association. 2023;30(2):308–317. https://academic.oup.com/jamia/article-abstract/30/2/308/6855146

8. Schiff G, et al. Missing Clinical and Behavioral Health Data in a Large Electronic Health Record (EHR) System.PubMed. https://pubmed.ncbi.nlm.nih.gov/27079506/

9. Richwine C. Progress and Persistent Disparities in Patient Access to Electronic Health Information. JAMA Health Forum. 2023 Nov 3;4(11):e233883. https://jamanetwork.com/journals/jama-health-forum/fullarticle/2811823

10. Patient-Centered Communication, Disparities, and Patient Portals in the US, 2017–2022. American Journal of Managed Care. January 2024. https://www.ajmc.com/view/patient-centered-communication-disparities-and-patient-portals-in-the-us-2017-2022

Platform Documentation and Clinical Reviews

11. Epic Systems Corporation. MyChart — Bringing Your Health Information Together (Account Linking FAQ).https://www.mypatientchart.org/MyChart/community/faq

12. Epic Systems Corporation. Share Everywhere FAQ. https://shareeverywhere.epic.com/FAQ

13. Gartner Peer Insights. MyChart Reviews & Ratings. https://www.gartner.com/reviews/product/mychart

14. Capterra. MyChartsOnline Reviews 2025. https://www.capterra.com/p/128410/MyChartsOnline/reviews/

Investigative Reporting

15. News 5 Cleveland. Dozens Complain of Inaccurate Information on MyChart After Visiting Cleveland-Based Healthcare Facilities. 2024. https://www.news5cleveland.com/news/local-news/dozens-complain-of-inaccurate-information-on-mychart-after-visiting-cleveland-based-healthcare-facilities

Health IT Policy and Fragmentation Analysis

16. Chief Healthcare Executive. The Multibillion Dollar Consequences of Fragmented Healthcare Information Systems. https://www.chiefhealthcareexecutive.com/view/consequences-of-fragmented-healthcare-information-systems

17. HelixBeat. The True Cost of Fragmented Healthcare Data. January 2025. https://helixbeat.com/the-true-cost-of-fragmented-healthcare-data/