D3222 is the CDT code for a partial pulpotomy that keeps the pulp alive in a permanent tooth so its unfinished root can keep forming.
- When to use: The pulp is still vital and the pre-op x-ray shows an open apex, usually after trauma or deep decay.
- When not to use: A full coronal pulpotomy is D3220, pulp removal ahead of a planned root canal is D3221, and a necrotic immature tooth is D3351 or D3355.
- Billing note: Send the pre-op x-ray showing the open apex, and expect some plans to fold D3222 into a later same-office root canal or apexification.
What D3222 covers
D3222 reports a partial pulpotomy on a permanent tooth whose root has not finished forming. A small portion of exposed or inflamed pulp is removed, the wound is dressed with a medicament, and the remaining pulp is left vital on purpose. The purpose is apexogenesis: the tooth’s own pulp finishes building the root, lengthening it and closing the apex, which a dead tooth cannot do. The descriptor states that the procedure is not to be construed as the first stage of root canal therapy.
The typical patients are young. A nine-year-old fractures a central incisor on a playground and exposes vital pulp, or a twelve-year-old’s first molar has deep caries reaching a pulp that is still healthy. The root walls are thin and the apex is wide open. Removing the pulp entirely would leave the root at that stage for good: thin-walled, fracture-prone, and hard to treat. The partial pulpotomy gives up a small amount of tissue so the root can finish.
D3222 is not:
- The primary-tooth pulpotomy. That belongs to D3220 and the primary pulpal-therapy codes.
- An emergency pain visit. That is D3221, pulpal debridement.
- A pulp cap. D3110 covers medicament over an exposure with no pulp tissue removed.
The axis against D3220: depth and intent
Both of these have to point at D3222 before you bill it:
- How much pulp is removed. D3220 takes all of the coronal pulp, down to the dentinocemental junction. D3222 takes a portion, typically the surface layer of inflamed tissue at the exposure, and leaves the rest of the coronal pulp in place.
- Why. D3220 preserves the root pulp of a tooth (overwhelmingly a primary molar) until exfoliation or restoration. D3222’s aim is apexogenesis: continued root formation on an immature permanent tooth.
The D3220 descriptor states it is not to be used for apexogenesis. That sentence pushes apexogenesis cases onto this code, so billing D3220 for an open apex is a descriptor conflict, not a judgment call. A carrier reviewing the chart on a young permanent tooth can recode or deny on the descriptor alone.
The bundling trap: what happens near a root canal
Two situations look similar in the chair and bill differently:
- The pulpotomy is the definitive treatment. Vital immature tooth, pulp preserved, root left to develop, follow-up scheduled. That is D3222, billed on its own.
- The pulp is being removed ahead of planned endo. This visit is pain control or interim management before a root canal. That is D3221, pulpal debridement, or palliative treatment, not D3222 or D3220.
Carriers enforce the boundary with bundling rules. Hawaii Dental Service’s published endodontic guidelines make the partial pulpotomy not billable to the patient when root canal therapy or the apexification codes D3351–D3353 are performed by the same dentist or office; the pulpotomy fee is absorbed into the definitive procedure. The window and mechanics are plan-dependent, but the pattern is common: a D3222 followed shortly by same-office endo on the same tooth reads to a payer as a root canal started under the wrong code.
When apexogenesis genuinely fails, the serial radiographs showing why the plan changed are what separate a failed vital-pulp therapy from a miscoded staged root canal.
When the pulp isn’t vital: the neighbor procedures
D3222 requires living pulp, because dead tissue cannot build a root. An immature permanent tooth with a necrotic pulp goes to one of two code series:
- Apexification: D3351 (initial visit), D3352 (interim medication replacement), D3353 (final visit, including the completed root canal). Medication induces a calcified barrier at the open apex so a conventional fill has something to seal against. The root does not grow further; the apex is closed artificially.
- Pulpal regeneration: D3355 (initial), D3356 (interim), D3357 (completion, excluding final restoration). The regenerative alternative, which attempts to restore vitality in the canal.
Apexogenesis continues a live root’s development; apexification and regeneration treat a dead one. If the root has already matured by the time endo is needed, the case is ordinary root canal therapy: D3310, D3320, or D3330 by tooth type. Every endodontic code and the situation it fits are listed in the root canal dental codes guide.
Building the claim
- Send the pre-op radiograph showing the open apex with the claim rather than waiting for the pend.
- Bill D3222 with the permanent tooth number. A claim edit that checks code-to-dentition consistency will reject a letter-coded tooth.
- Write the note to the descriptor: portion of pulp removed, remainder vital, medicament placed, goal of continued root development. Avoid phrasing that frames the visit as the start of endo.
- Bill the restoration separately under the appropriate restorative code; the pulpotomy code does not include it.
- Verify the plan’s bundling window before any later endo on the same tooth from your office, and keep the follow-up radiographs in the chart.
For where attachments and narratives go on the form, see the ADA dental claim form guide.
FAQs
- What is the difference between D3222 and D3220?
- How much pulp comes out, and why. D3220 removes all of the pulp inside the crown down to the dentinocemental junction and medicates the root pulp, and its descriptor states that it is not to be used for apexogenesis. D3222 removes only a portion of the pulp to keep the rest vital on a permanent tooth with incomplete root development, so the root can keep growing and the apex can close. For an immature tooth where the goal is continued root formation, D3222 is the only code of the two that fits.
- Can D3222 be billed on a primary tooth or a fully developed permanent tooth?
- No. The nomenclature restricts the code to a permanent tooth with incomplete root development. A primary tooth needing pulp therapy goes to D3220 or the primary-tooth pulpal therapy codes. A mature permanent tooth has no root left to develop, so the case is a pulp cap, a therapeutic pulpotomy, or root canal therapy depending on the diagnosis. At least one published carrier guideline limits the benefit to teeth with radiographically incomplete roots.
- Is D3222 the first stage of a root canal?
- No. The descriptor says the procedure is not to be construed as the first stage of root canal therapy; the pulp is kept alive so the root can finish forming. Some carriers enforce this with bundling: Hawaii Dental Service's published endodontic guidelines make the partial pulpotomy not billable to the patient when root canal therapy or apexification (D3351–D3353) is performed by the same office. If the plan from the start is a root canal and the pulp is removed for pain relief in the interim, that visit is D3221, pulpal debridement.
- If the pulp later dies anyway, what codes apply then?
- It depends on how far the root got. If the root matured enough for conventional treatment, it is standard endodontic therapy: D3310, D3320, or D3330 by tooth type. If the apex is still open and the pulp is necrotic, the options are apexification (D3351 initial, D3352 interim, D3353 completion) or pulpal regeneration (D3355 initial, D3356 interim, D3357 completion). A plan that folds the pulpotomy into subsequent same-office endo applies that rule regardless of the sequence, so verify how the plan handles a failed apexogenesis case.
- What documentation supports a D3222 claim?
- Above all, a pre-operative radiograph showing incomplete root development, since the open apex is the coverage condition. Also include the tooth number, the diagnosis (traumatic exposure or deep caries with vital pulp), a note that only a portion of the pulp was removed with the remainder left vital, the medicament placed, and the goal of continued root development. Chart the follow-up plan: apexogenesis is monitored over months with periodic radiographs, and those films prove the treatment worked if the claim is audited.
Related codes
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CDT codes are maintained by the American Dental Association. This page is an editorial billing guide, not the official ADA code descriptor. Verify current coverage policies with each carrier before submitting claims.