CODE G · JAW JOINT TREATMENT
How to read this code.
“Functieonderzoek kauwstelsel” is the official Dutch performance name for code G21 in the 2026 NZa index. It remains visible so you can compare the code with the original Dutch source.
What does the code say?
- This code belongs to Jaw joint treatment. On an estimate or invoice it refers to the recorded performance with the official name shown above.
- A code alone does not tell the full treatment story. The treating practitioner can explain which action, phase and possible alternatives were discussed in an individual situation.
What does the amount show?
- The fixed NZa maximum tariff listed for G21 in the 2026 index is € 135,03.
- A max-max tariff may be up to 10% above the usual maximum, but only under a written agreement between the practice and the insurer. It is not a general surcharge: the agreement must cover this performance and the insurer or insured person concerned.
- One proposal can contain several performances. Read the code, quantity, description and total together.
Useful checks
- If something is unclear, ask which performance was included and where it appears in the estimate or invoice.
- Check the official name and tariff year against the source below before drawing conclusions.
FUNCTIONAL DIAGNOSTICS
From a complaint to the appropriate examination.
A simplified route through codes for orofacial pain and dysfunction (OPD). The practitioner decides which step fits after examination. Start Patient with a complaint
C003 Problem-focused consultation
01 Is the cause likely attributable to the teeth or dental tissues?
Yes Treat the identified dental cause
No
02 Is another medical cause suspected?
Three possible follow-up routes
G21
Functional examination of the chewing system
A clear working diagnosis may lead to a non-complex treatment plan.
Possible treatment: G41 · G62 · G68G22G23
Extended examination
Additional functional examination and, where needed, measurement and recording of muscle activity.
Outcome: non-complex, complex diagnosis or referralG43
Complex or multidisciplinary route
Complex treatment or second-line referral, depending on the diagnosis and treatment plan.
Possible codes: G43 · G44 · G46 · G62 · G68Schematic explanation. Clinical assessment and the complete current NZa performance descriptions remain decisive.
