Blockchain in healthcare: Why is implementation so difficult (Updated 2026)

Entering 2026, digital healthcare is no longer a trend but has become a mandatory operating platform. At Tan Phat Digital, we realize that even though the technology has matured, bringing blockchain into a real clinical environment is still a difficult problem. The year 2026 is considered a "hinge" time when legal frameworks such as the Digital Technology Industry Law begin to take effect, creating both opportunities and unprecedented strict compliance requirements.

The paradox of immutability in medical record management

Immutability remains the most controversial characteristic. While it creates a perfect audit record, it creates great pressure in an inherently volatile medical environment.

The conflict between permanence and clinical data bias

The 2026 medical record is a multi-layered data entity, including data from wearables (IoMT) and agent AI (Agentic AI). If the input information is incorrect—for example, a sensor error or manual input of the wrong blood type—a correction on the blockchain still requires a new transaction rather than a direct modification. Doctors are concerned that in emergency situations, the coexistence of erroneous data and correction data on the ledger could lead to erroneous clinical decisions.

Legal Challenge and the Right to be Forgotten (2026)

The conflict between blockchain immutability and the "Right to be Forgotten" (GDPR Article 17) remains unresolved. However, new standards in early 2026 have further shaped how data is handled:

GDPR and equivalent laws: Requests to delete personal data remain a barrier for public blockchains.
HIPAA (United States): Health information privacy regulations now incorporate decentralized identity standards (DIDs).

Technical performance and scalability limits 2026

The healthcare industry is currently "drowning" in a sea of data expected to exceed 50 zettabytes. Blockchain faces processing pressure from millions of real-time connected IoMT devices.

Transaction Latency and Agentic AI

The explosion of Agentic AI in 2026 requires extremely fast data validation speeds. Older generation blockchains (Bitcoin 7 TPS, Ethereum 15-30 TPS) are completely unresponsive. Tan Phat Digital believes that only specialized Layer 2 solutions or Sidechains can handle the huge volume of clinical transactions without causing delays in remote surgeries or emergencies.

The burden of storing medical image data

Blockchain still cannot directly store heavy image files such as MRI or 4K CT. The standardized solution in 2026 is to use an IPFS system that integrates with sovereign cloud platforms (Sovereign Cloud). This helps protect data from change while still ensuring the access speed needed for diagnostic imaging AI algorithms.

Interoperability Barriers and Legacy Systems

Data fragmentation persists due to legacy electronic medical record (EHR) systems that cannot yet be migrated synchronously.

Semantic Interoperability and FHIR Standards 2026

Transporting data via blockchain is not enough; That data must be “understandable” by all parties. The HL7 FHIR standard has now become a mandatory requirement in digital health projects in Vietnam. However, the "data monopoly" from traditional EHR vendors is still a big barrier, as they deliberately limit interoperability to retain customers.

Three-layer architecture for modern digital health

To solve this problem, new architectures have separated functions:

Patient Blockchain: Personal data ownership management through VNeID.
Blockchain Provider: Authentication of practice certificates and doctor identities (Verifiable Credentials).
Social Blockchain: Supports anonymous research data sharing using ZKP technology.

This model helps reduce pressure on the system but requires very high synchronization of cross-chain signature algorithms.

Financial analysis and ROI in 2026

Cost is still a "shock" for with many hospitals. A large-scale blockchain project currently has an investment ranging from 500,000 USD to more than 5 million USD.

Current cost structure:

Compliance infrastructure: The cost of maintaining nodes that meet national security standards can be up to 50,000 USD/month.
Smart contracts: Developing and especially auditing the security of smart contracts takes a large proportion to avoid hacks like Ronin in the past.
System integration: The cost of connecting to legacy EHRs still accounts for about 30% of the budget due to the lack of standardized APIs.

Although administrative costs can be reduced by 30-45%, the return on investment (ROI) is often lost It only takes 3-5 years for it to appear clearly, making many medical facilities still hesitant.

Human factors: Trust and Skills

In early 2026, the biggest barrier is no longer technology but people.

Resistance from doctors: About 34% of doctors still feel blockchain is too complicated. Managing personal keys is a psychological burden: if the key is lost, patient records can be permanently blocked.
Administrative culture: Many hospital leaders still consider data a proprietary asset and are afraid to share it on a decentralized system for fear of losing competitive advantage.
Dual specialized human resource shortage: The market in 2026 is thirsty personnel are both knowledgeable about clinical processes and proficient in blockchain techniques.

See more: Blockchain vs Database

Lessons from Practice and Security Risks

The failures of projects like Gem Health or TradeLens (IBM/Maersk) have left behind a bloody lesson: Technology cannot succeed without the participation of the entire ecosystem. In healthcare, when pharmaceutical companies and hospitals still consider data as a strategic "weapon", promoting cooperation is extremely difficult.

Cybersecurity is also a constant worry. Even though the blockchain core is secure, bridges and applications are still vulnerable to attacks. The average damage for a medical data leak in 2026 has exceeded 10 million USD, the highest level in any industry.

Vietnam Context 2026: A pivotal moment

Vietnam is making great strides:

VNeID electronic health book: By early 2026, the creation of the book Electronic health for the entire population has been basically completed. People can use data on VNeID to completely replace paper books.
Digital Technology Industry Law: Begins to take effect, creating a legal corridor for testing blockchain platforms in public services.
Training Cooperation: In January 2026, Vietnam Blockchain Association and Ho Chi Minh City University of Medicine and Pharmacy signed a cooperation agreement to apply Blockchain and AI in medical research, marking the systematic preparation of human resources.
NDAChain: The national blockchain platform is currently deeply embedded in the National Data Center infrastructure, ready to expand to local medical units.

The medical blockchain market in the Asia-Pacific region is forecast to grow at a CAGR of over 60% in the coming period, thanks to the push strong from Digital Government policy.

Optimization Solutions and Future Vision

Tan Phat Digital recommends that medical organizations should prioritize the Blockchain Consortium (Consortium) model. This model helps:

Ensure high privacy (only licensed members can access).
Fast transaction speed, meeting clinical requirements.
Stable and predictable operating costs.
Complete compliance with legal regulations of the Ministry of Health.

In addition, the integration of ZKP (Zero Knowledge Proof) and Homomorphic Encryption will enable big data analysis without revealing patient identities, solving the "security vs. sharing" problem.

Frequently Asked Questions (FAQs) about Blockchain in Healthcare

1. Why is blockchain immutability a problem in healthcare?
Immutability prevents direct modification of erroneously entered clinical data. Instead of deleting, medical staff must perform new correction transactions, easily causing confusion in emergency situations.

2. Does Blockchain violate the patient's "Right to be Forgotten"?
There is a risk of conflict with GDPR (Article 17). To comply, organizations often use a hybrid storage model: keeping personal information off-chain and only storing the hash on the blockchain.

3. Does blockchain processing speed meet emergency needs?
Public blockchains like Ethereum (15-30 TPS) are often too slow. However, Consortium networks or Layer 2 solutions have faster speeds, suitable for clinical requirements.

4. How to store large image data (MRI/CT) on blockchain?
Blockchain does not store heavy files directly. Data is saved on IPFS or secure cloud, blockchain only stores "cryptographic addresses" for retrieval and authentication.

5. What is the average implementation cost for a medical blockchain project?
A large-scale project typically ranges from $500,000 to over $5 million, including compliance infrastructure, smart contracts, and legacy EHR system integration.

6. Why did high-profile projects like Gem Health and TradeLens fail?
The main reason is the lack of commitment and participation of stakeholders in the ecosystem, along with resistance from competitors when it comes to data sharing.

7. How is Consortium Blockchain different from Public Blockchain?
Consortium Blockchain only allows licensed entities (hospitals, Ministry of Health) to participate in authentication, helping to speed up transactions and better protect privacy.

8. Does the VNeID electronic health book in Vietnam have blockchain applications?
By 2026, VNeID has begun integrating with the national blockchain infrastructure NDAChain to manage digital identification (DID) and trace the origin of medical data.

9. How does the latest legal regulation in Vietnam (2026) affect medical blockchain?
The Digital Technology Industry Law begins to take effect, creating a legal corridor for piloting digital data assets and regulating responsibilities for network node operators.

10. Do medical staff encounter any difficulties when using this technology?
About 34% of doctors admitted to lacking knowledge about blockchain. The fear of losing your personal key (permanently losing access to your records) is the biggest psychological barrier.

11. How to correct a medical error accidentally recorded on the blockchain?
The user makes a new transaction to record the correct information. The system will keep both records but mark the new record as current information for auditing.

12. When can hospitals get a return on investment (ROI) from blockchain?
ROI typically begins to be noticeable after 3-5 years through a 30-40% reduction in administrative costs, a reduction in insurance fraud, and an increase in claims processing speed.

13. How is ZKP (Zero Knowledge Proof) technology applied?
ZKP helps verify the validity of data (such as practice certificates or insurance conditions) without revealing the content of sensitive patient information.

14. How does Blockchain help in fighting counterfeit drugs?
It creates a transparent supply chain from factory to patient, allowing anyone to trace the origin and check the authenticity of the product.

15. Why is dual expertise needed in the medical blockchain project?
The project needs people who both have a deep understanding of the clinical process and are proficient in blockchain techniques to design truly useful and compliant smart contracts.

By 2026, blockchain will no longer be a shiny keyword but will become an essential infrastructure for digital trust. Although there are still difficulties in cost and changing psychology, with the completion of Vietnam's legal framework and the convergence of technologies such as AI and IoT, blockchain is gradually asserting its role as the "backbone" of modern healthcare. Success will only come to organizations that know how to take advantage of the common ecosystem and put the interests of patients first.