D1510 is the CDT code for a space maintainer that is fixed (cemented), unilateral (one side of the arch), and reported per quadrant. It is placed after premature loss of a primary tooth to prevent adjacent teeth from drifting into the space before the permanent tooth erupts.
Last updated June 2026 · Reviewed by the PracticeAlpha billing team
Get help with D1510 claims →Use D1510 when cementing a fixed, unilateral space maintainer appliance following premature loss of a primary tooth. The most common appliance type billed under D1510 is a band-and-loop maintainer, where a metal band is cemented on an adjacent primary molar and a wire loop holds the space where the lost tooth was. The appliance stays in place until the permanent tooth erupts.
Common clinical scenarios: A primary first or second molar lost early due to decay or trauma, with the permanent successor not yet ready to erupt. Space at risk of collapse from mesial drift of adjacent teeth. Patient is too young or uncooperative for a removable appliance. Orthodontist or pediatric dentist determines a passive fixed appliance is the appropriate space management approach.
Do NOT use D1510 for: Bilateral fixed space maintainers spanning both sides of an arch (use D1515). Removable unilateral space maintainers (use D1520). Removable bilateral space maintainers (use D1525). Distal shoe space maintainers for unerupted first permanent molars (use D1575). Space maintainer removal and recementation are separate codes.
Click any code to see the difference.
One appliance on one side of the arch. Typically a band-and-loop. Maintains space in a single quadrant. Billed once per quadrant where the appliance is placed.
A single appliance spanning both sides of one arch. Common examples include a lingual arch (lower) or transpalatal arch (upper). Maintains space on both sides simultaneously. Billed once per arch.
Billing tip: If you place two separate band-and-loop maintainers in different quadrants, bill two units of D1510. If you place one lingual arch connecting both lower quadrants, bill one unit of D1515. The number of appliances and whether they connect across the midline determine the code. Never bill two D1510 units for a single bilateral appliance.
Some plans deny space maintainer claims when the lost primary tooth was close to its normal exfoliation date. The insurer may argue that space maintainer placement was not necessary because the permanent tooth was expected to erupt soon. Submit a supporting narrative and radiograph showing the development stage of the permanent successor. If the permanent tooth is not expected to erupt for at least six months, document this clearly.
A current periapical or panoramic radiograph is standard documentation for D1510. The x-ray must show the missing primary tooth space, the adjacent teeth that could drift, and the development status of the permanent successor. Claims without a supporting radiograph are routinely denied or pended for records. Send the x-ray with the initial claim whenever possible.
Many pediatric dental plans require pre-authorization for space maintainers. Placing the appliance without prior approval and then submitting the claim often results in a denial. Always check pre-auth requirements during benefits verification. Submit the pre-auth with a radiograph and a brief clinical narrative before starting treatment.
If a single lingual arch or transpalatal arch is placed and billed as two units of D1510, the claim will deny or be reduced. A bilateral appliance is D1515, billed once per arch. Only bill two units of D1510 when two physically separate unilateral appliances are placed in two different quadrants, each with its own record entry.
Current x-ray showing the missing primary tooth space, the adjacent teeth, and the development stage of the permanent successor. This is the primary piece of evidence supporting medical necessity for the space maintainer.
Record why the primary tooth was lost (extraction due to decay, trauma, abscess) and confirm it was before the expected natural exfoliation age. Note that space loss risk was assessed and the appliance is indicated.
Document the specific appliance type placed (such as band-and-loop), which tooth the band is placed on, and which quadrant the appliance is in. This confirms the billing unit is correct and distinguishes D1510 from D1515.
Record the pre-auth approval number in the patient record and include it on the claim form. If the plan did not require pre-auth, note that benefits were verified and no pre-auth was needed.
The clinical note or x-ray should confirm that the permanent tooth is not expected to erupt imminently. If eruption is expected within a very short period, document why the space maintainer is still clinically indicated.
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Learn about our billing servicesD1510 is the CDT code for a space maintainer that is fixed (cemented in place), unilateral (one side of the arch), and billed per quadrant. It is placed after premature loss of a primary tooth to hold the space open until the permanent tooth erupts.
D1510 is fixed and unilateral, covering one quadrant. D1515 is fixed and bilateral, covering both sides of one arch in a single appliance such as a lingual arch or transpalatal arch. The appliance design and whether it spans across the midline determines which code to use.
D1510 is a fixed appliance cemented onto the teeth. D1520 is a removable unilateral appliance the patient takes in and out. Fixed is generally preferred for younger patients or those who may not consistently wear a removable device.
Common reasons include: the primary tooth was considered near natural exfoliation (payer questions necessity), missing radiograph, no pre-authorization when required, and billing two units of D1510 for a single bilateral appliance that should be D1515.
Yes. A current periapical or panoramic radiograph is standard documentation. It should show the missing space, adjacent teeth, and development stage of the permanent successor to support medical necessity for the space maintainer.
Yes. D1510 is billed per quadrant, so two separate unilateral fixed appliances in two different quadrants are two separate D1510 units. However, a single appliance spanning both sides of one arch is D1515, not two units of D1510.
Search all 206 CDT codes in our dental coding guide.