Avoid rejections: transmission to the Health Card System for 2026 practices
2026 procedures and deadlines for sending data to the Health Card System (Sistema Tessera Sanitaria): mandatory fields, most common errors, and how to automate from your management software to reduce...
Avoid rejections: sending data to the Health Card System for clinics in 2026
Yes: if you provide healthcare services in Italy, you are almost certainly required to send data to the Health Card System (Sistema Tessera Sanitaria). The correct procedure follows three steps: check if your professional category is subject to the obligation, obtain your access credentials for the portal, and check that your data record complies with the technical specifications required by the decree. From 2025, the submission becomes annual.
In brief:
From 2025, health data must be sent to the Health Card System annually, resulting in a larger volume of data to verify compared to the past.
It is mandatory for doctors, healthcare facilities, pharmacies, and other professional roles under Legislative Decree 175/2014, by verifying the ATECO code to recognize the obligation.
The most common errors concern the naturaIVA and pagamentoTracciato fields, and compliance with the rules on distinguishing between cash and traceable payments, which block transmission.
Submission can be done manually via upload or automatically through management software compliant with the TS System technical specifications, with preventive testing recommended.
Integrating the submission system into the clinic management software helps reduce errors, improve data quality, and better monitor internal accounting.
Index
Who must send data to the Health Card System
When to send: deadlines and calendar 2026
What to send: mandatory fields and codes to respect
How to send: channels, credentials, and technical specifications
Special cases: those without a VAT number and ATECO updates
Common errors and checks before sending
Why it is convenient to integrate the TS submission in the clinic's management software
Transforming the TS obligation into management control
How Treatbase simplifies sending data to the TS System
Sources
Who must send data to the Health Card System
The obligation concerns the entities identified by Legislative Decree 175/2014 and subsequent implementing decrees, a broader list than many think.
Doctors and dentists registered with professional associations.
Public and private healthcare facilities, including dental clinics.
Pharmacies, drugstores, and other commercial establishments that sell medical devices.
Psychologists, veterinarians, opticians, and other roles progressively added by subsequent resolutions.
The FAQs of the Revenue Agency are frequently updated precisely to clarify new categories included in the obligation. If you have doubts about your position, the quickest way to find peace of mind is to check your activity's ATECO code and compare it with the list published on the TS System portal.
When to send: deadlines and calendar 2026
The most important rule to remember this year is this: starting from 2025, the transmission of health expenses has become annual, no longer on a semi-annual basis as in the past. The change comes from Legislative Decree no. 81 of June 12, 2025, and from the decree of the Ministry of Economy and Finance of October 29, 2025.
To organize the clinic's work, it is useful to keep in mind some fixed points:
The official calendar with precise deadlines for 2026 is published on the Health Card System portal, along with updated technical specifications.
The annual frequency reduces the number of submissions, but increases the volume of data to be checked in each transmission.
Those who manage multiple locations or collaborators must plan data collection with a margin, not close to the deadline.
Fewer submissions mean fewer opportunities to correct any errors on the fly: the quality of the data at the source therefore becomes more critical than in the past.
What to send: mandatory fields and codes to respect
Each record transmitted to the TS System must respect a precise data schema. Some fields deserve special attention because they are the most frequent cause of errors or data not appearing correctly in the pre-filled tax return.
IdSpesa: unique identifier of the individual service, must be consistent with the issued invoice.
Tax code or VAT number of the patient: field that determines to whom the expense is attributed in the tax return.
NaturaIVA: code qualifying the tax regime of the service; an error here is among the most common causes of rejection.
PagamentoTracciato: indicates whether the payment was made with traceable means, a necessary requirement for the patient's tax deduction, as clarified by the transmission methods published by the TS System.
Nature code "AA": to be used specifically for payments made with vouchers or healthcare bonuses.
Stamp duty (Imposta di bollo): when applicable, it must be indicated separately from the amount of the service.
A case that often generates confusion is mixed payment, partly in cash and partly traceable. In these cases, the invoice must show the overall total, but the record must distinguish the non-deductible share with the "AA" code. Finally, the opposition flag reflects the patient's choice not to appear in the pre-filled tax return: when it is active, the right of opposition exercised by the citizen requires transmitting the data anyway, but without associating it with the tax code.
How to send: channels, credentials, and technical specifications
Access to the TS System portal requires SPID, CIE, or TS-CNS credentials, in addition to any delegation for collaborators and associated practices. Once inside the reserved area, there are two ways to transmit data.
Manual upload: you fill in a file according to the required record layout and upload it directly to the portal, a viable option for low volumes.
Automated submission: the clinic management software generates and transmits data automatically through the web services made available by the TS System.
Data schema verification: the reference technical schema remains the one established by the decree of August 2, 2016, with updates periodically published for software developers and vendors.
The technical specifications and data layouts of the TS System define the accepted formats with precision: a syntax error in these fields leads to the automatic rejection of the record, not just a simple warning.
A tip: before relying on automated transmission, always test a small batch of records in a trial environment. Finding a format error on five entries is much less costly than finding it on five hundred at the end of the year.
Special cases: those without a VAT number and ATECO updates
Not all entities required to submit have a VAT number, and the procedure provides a specific exception for these cases.
Authorized healthcare facilities that do not hold a VAT number can indicate their tax code in the dedicated field, as clarified by the operational instructions of the TS System.
The same rule applies to entities with special tax regimes, such as businesses operating in Livigno, Campione d'Italia, or non-profit organizations.
ATECO categories continue to be updated: opticians and other professional figures have been the subject of specific clarifications in the most recent FAQs of the Revenue Agency.
Before registering on the portal, verify that the ATECO code registered with the Chamber of Commerce actually corresponds to your activity: an outdated or generic code is a frequent cause of rejections during the registration phase.
Common errors and checks before sending
The most frequent rejections almost always stem from a handful of recurring errors, easily avoidable with systematic checking.
NaturaIVA field filled with a code that is not consistent with the tax regime of the service.
PagamentoTracciato indicated incorrectly compared to the payment method actually used.
Opposition flag omitted or handled inconsistently with the patient's choice.
Patient personal data (tax code, details) transcribed inaccurately.
The IdSpesa record layout and the technical rules of the TS System are binding: a field out of format blocks the entire record, not just the single item. Testing a sample of data in a trial environment before final submission significantly reduces rejections, and it is good practice to handle any error communication received from the system as a priority, not as a side note to be fixed later.
Why it is convenient to integrate the TS submission in the clinic's management software
A management software that directly links the medical record, invoicing, and payments reduces the most common errors at the root: naturaIVA and pagamentoTracciato are filled in automatically based on data already entered, without double entry.
Fewer manual steps mean fewer opportunities for error in mandatory fields.
Payment data is classified automatically, reducing cases of incorrect pagamentoTracciato.
Internal reports allow you to verify the transmitted health expenses before the annual deadline.
The authorities themselves point out that the quality of the transmitted data directly affects the correctness of the pre-filled tax return: a management software that centralizes patient data and payments eliminates most of the manual verification work before sending.
Transforming the TS obligation into management control
Sending data to the TS System is often treated as a bureaucratic hassle to get over quickly. This is a mistake in perspective. Every record transmitted is also internal data on your business: if you handle it with care, you get better control over the clinic's accounting, not just regulatory compliance. The practical priority for whoever manages the administration is simple: perform a periodic audit of the generated record layouts and train staff on the fields that cause the most errors. It is worth more than any software.
— Matteo
How Treatbase simplifies sending data to the TS System
There are software solutions that offer an alternative to manual management of records for clinics that want to reduce rejections in sending data to the Health Card System: automated invoicing and payment management can directly populate the fields required by the record layout, avoiding double entry between medical records and accounting.
The payment management system automatically classifies traceable transactions, reducing errors on the pagamentoTracciato field described in this article. The clinic data remains centralized and consistent, a concrete advantage when the submission frequency has become annual and each transmission contains more data to check. Data migration to Treatbase is free and requires no operational downtime for the clinic. If you want to see how it works in practice, request a demo on Treatbase and check together with the team how to correctly set up the flow to the TS System.