Coding of the physiotherapy assessment (BDK): what the NGAP says in 2026
Coding of the physiotherapy diagnostic assessment (BDK) in 2026: AMK values, when to rebill it, and what the NGAP requires. Reference sheet to download.
Countries covered : France
The physiotherapy diagnostic assessment (BDK) is both a mandatory clinical act and a coded act. Coding it correctly, and knowing when to rebill it, prevents billing rejections.
This page summarises the framework, the applicable AMK values, and the rebilling frequency, with a reference sheet to download.
The values indicated are the conventional rates for mainland France. Always check the current version of the NGAP on ameli.fr before billing.
The BDK, a mandatory act
How much is a BDK coded for
The coding depends on the type of treatment to which the assessment is linked:
- Rehabilitation and functional retraining: 10.7 AMK, i.e., €23.65.
- Rehabilitation of the consequences of neurological and muscular disorders (excluding peripheral radicular or trunk involvement), 10.8 AMK, i.e., €23.87.
The rate is obtained by multiplying the coefficient by the billing unit value: AMK = €2.21 in mainland France, €2.43 in overseas departments.
When to rebill the BDK
The rebilling frequency depends on the type of treatment, and this is a frequent source of error:
- Rehabilitation and functional retraining (assessment coded 10.7 AMK, chapters II or III of the NGAP): the next BDK is billable at the 30th session, then every 20 sessions.
- Rehabilitation of the consequences of neurological and muscular disorders (assessment coded 10.8 AMK): the next BDK is billable at the 60th session, then every 50 sessions.
Applying the functional rehabilitation billing intervals to neurological care (or vice versa) exposes you to rejection. Beyond the pricing framework, these intermediate assessments document progress objectively and justify the continuation of care.
Avoiding rejections and overpayments
Most billing disputes surrounding the BDK are due to simple and avoidable errors:
- Out-of-frequency rebilling: billing an intermediate assessment before the applicable deadline, or failing to respect the subsequent intervals, exposes you to rejection. Be careful not to confuse the two systems: 30th session then every 20 for functional, 60th session then every 50 for neurological and muscular.
- Coefficient unsuited to the treatment: coding 10.8 AMK for an assessment that falls under rehabilitation and functional retraining (10.7 AMK), or vice versa, distorts the billed amount. Always link the coding to the type of treatment actually performed.
- Incorrect billing unit value: applying the mainland France value (€2.21) in an overseas department (€2.43), or using an outdated value, leads to an incorrect amount.
- Assessment billed without a corresponding written document: the coded BDK must be supported by a written document sent to the prescriber; in the event of an audit, the absence of supporting documents can turn a billed act into an overpayment.
In practice, a rejection results in billing that has to be redone; an overpayment detected during a retrospective audit results in a refund to the Assurance Maladie. In both cases, the traceability of the act (date, type of treatment, assessment document) is the best protection.
BDK coding reference sheet to download
Coefficients, AMK value, and rebilling rules on a single page to print and keep close by. Access the PDF by entering your email:
Travel allowances
Since 2026, specific travel allowances have been grouped into a single flat-rate travel allowance (IFS) of €4 for acts performed at the patient's home, to which mileage allowances may be added according to the conditions of the NGAP.
The nomenclature point to know
The nomenclature of physiotherapy acts has evolved, and AMK remains the billing unit for assessments. For the logic of the reform (disappearance of AMS and AMC, new billing codes), please refer to our page dedicated to the 2026 physiotherapy nomenclature.
The BDK must be written
Coding is inconceivable without the assessment document. The BDK is a written document sent to the prescribing physician, and it will be the document examined in the event of an audit. Start with a fixed template and standardise your diagnosis and objective formulations.
This is what Delta does: you capture your observations via live note-taking or post-session dictation, and the tool generates a structured BDK according to your template, ready to send, with a longitudinal patient memory that reuses the patient history from one assessment to another (useful for intermediate assessments). HDS hosting, GDPR compliant.
Frequently asked questions
Is the physiotherapy diagnostic assessment mandatory?
Yes. It has been mandatory since 1996 (Decree No. 96-879 of October 8, 1996). The BDK includes the physiotherapy diagnosis, care objectives, and choice of techniques.
How is a BDK coded in 2026?
It is coded as 10.7 AMK (€23.65) for rehabilitation and functional retraining, and 10.8 AMK (€23.87) for rehabilitation of the consequences of neurological and muscular disorders, based on an AMK billing unit of €2.21 in mainland France.
When should a BDK be rebilled?
It depends on the treatment: in rehabilitation and functional retraining, at the 30th session then every 20 sessions; in rehabilitation of the consequences of neurological and muscular disorders, at the 60th session then every 50 sessions.
What is the value of the AMK billing unit?
The AMK billing unit is worth €2.21 in mainland France (€2.43 in the DOM).
Why is a BDK rejected or reclassified as an overpayment?
Most often due to out-of-frequency rebilling (confusing the functional rehabilitation billing intervals with the neurological rehabilitation billing intervals), a coefficient unsuited to the treatment, an incorrect billing unit value, or the absence of an assessment document justifying the coded act.
Cut the time spent on your reports in half
Delta generates your physiotherapy diagnostic assessments from your live observations or your dictation.
Try for free