D5866 — Overdenture — partial, mandibular
D5866 is the partial lower overdenture.
One of four overdenture on natural teeth codes. If you are trying to understand the treatment, start with the overdenture on natural teeth guide; if you are trying to understand this line on your estimate, you are in the right place.
What the number specifies, what it costs, what your plan is likely to do with it, and the named differences between it and the codes around it — in that order.
Reading D5866
Arch — lower. The bone is denser, but there is far less surface area to support anything removable and the nerve running through the jaw limits how aggressive surgery can be.
D5866 compared with its closest relatives
D5865 — Overdenture — complete, on natural teeth (lower): It is the complete lower overdenture, seated over retained natural teeth.
D5864 — Overdenture — partial maxillary: It is the upper-jaw version.
D5863 — Overdenture — complete, on natural teeth (upper): It is the upper-jaw version.
Those three codes and D5866 are the whole group — nothing else describes this procedure. None of these are interchangeable, even though they sound as though they might be. Checking that the code on your estimate is the one that matches the planned treatment takes a minute and prevents most billing surprises.
Every code in this group
These codes describe the same broad procedure and differ in one respect each. Each has its own page with its own fee range and coverage notes.
| Code | Procedure |
|---|---|
| D5866 | Overdenture — partial, mandibular — this page |
| D5863 | Overdenture — complete, on natural teeth (upper) |
| D5864 | Overdenture — partial maxillary |
| D5865 | Overdenture — complete, on natural teeth (lower) |
Questions about D5866
What is D5866 on my dental bill?
Overdenture, partial, mandibular. It belongs to the prosthodontics, removable section of the code set.
How much does D5866 cost?
Most private fees fall in $1,600–$3,600. Geography accounts for more of that spread than anything clinical.
Is D5866 a covered benefit?
Expect major prosthodontic handling — typically 50%. Submitting an estimate first turns that percentage into a number you can rely on.
What is the difference between D5866 and D5865?
D5865 is overdenture, complete, on natural teeth, lower: it is the complete lower overdenture, seated over retained natural teeth. They are different operations that happen to sit next to each other in the code set, so one is not an alternative way of billing the other.
Also known as: overdenture, tooth-supported denture, retained roots, bone preservation.