D7285 is the CDT code for an incisional biopsy of hard oral tissue — the surgical removal of a portion of an osseous or intra-osseous lesion (such as a cyst or tumor) involving bone or tooth, for laboratory examination. Only part of the lesion is sampled to obtain a diagnosis, not the entire lesion.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D7285 Code
Report D7285 when the dentist or oral surgeon removes a representative portion of a hard-tissue lesion — bone or tooth — to send for histopathologic diagnosis. It is the right code when a suspicious radiolucency, radiopacity, cyst, or bony tumor needs to be confirmed before definitive treatment is planned.
Do not confuse D7285 with its soft-tissue counterpart, D7286 (incisional biopsy of oral tissue — soft). The hard-versus-soft distinction is the key choice here. It is also distinct from an excisional biopsy, where the whole lesion is removed (benign excision codes such as D7410/D7411, or malignant excision such as D7440). D7285 is explicitly not used for apicoectomy or periradicular surgery, which have their own endodontic-surgery codes.
Documentation & Clinical Scenarios
Strong documentation supports both the diagnosis and the claim:
- Tooth number or site and a clear description of the lesion (location, size, radiographic appearance).
- Pre-operative radiograph(s) demonstrating the osseous or intra-osseous lesion.
- A surgical narrative describing that a portion (incisional) of the hard-tissue lesion was removed and submitted to pathology.
- The clinical indication — why a biopsy was warranted (suspicious or undiagnosed lesion).
The pathology laboratory analysis is billed separately from D7285 — this code covers the surgical act of obtaining the specimen, not the histopathologic exam. Any grafting or additional surgical procedures are also reported under their own codes.
Insurance & Billing Tips
- Verify benefits first. Confirm whether oral-surgery biopsies are a covered benefit and whether the plan adjudicates them under dental or medical coverage — many payers cross-code biopsies to medical.
- Bill pathology separately. The lab's histopathologic interpretation is its own line item, not part of D7285.
- Document "incisional." If the entire lesion was removed, an excision code may be more accurate; a partial sample supports D7285.
- Attach the radiograph and narrative. Hard-tissue biopsies are frequently reviewed; the pre-op film and a short narrative reduce denials.
- Check medical cross-coding. When the lesion is medically necessary to evaluate, submitting to medical with the appropriate CPT crosswalk may be required before the dental plan responds.
Example Case
A 52-year-old patient is referred after a routine panoramic film shows a well-defined radiolucency in the posterior mandible near tooth #19. The oral surgeon elects to sample the lesion before planning definitive treatment, removing a representative portion of the bony lesion under local anesthesia and submitting it to an oral pathology lab. The surgical removal of the partial hard-tissue specimen is reported as D7285, with the pre-op radiograph and a brief narrative attached. The pathologist's interpretation is billed separately by the lab.
Patients call about the procedure, not the code. DentalReception AI answers and books those calls 24/7, captures insurance details, and routes clinical and pathology questions to your team. See oral surgery call handling, or book a demo.
Frequently Asked Questions
How is D7285 different from D7286?
Both are incisional biopsies, but the tissue type differs. D7285 is for hard oral tissue — bone or tooth (for example, an osseous or intra-osseous cyst or tumor). D7286 is for soft tissue, such as a lesion on the gingiva, cheek, tongue, or palate. Selecting the correct code depends entirely on whether the sampled tissue is hard or soft, so confirm the lesion type before billing. Using the wrong one is a common cause of denials.
Does D7285 include the pathology lab fee?
No. D7285 covers only the surgical act of obtaining the hard-tissue specimen. The histopathologic examination performed by the pathology laboratory is a separate service billed under its own code, usually by the lab. Bundling the lab fee into D7285 is inaccurate, so report the surgical biopsy and the laboratory analysis on separate lines to avoid confusion and denials.
Is D7285 covered by dental or medical insurance?
It depends on the payer. Many carriers treat oral biopsies as medically necessary and adjudicate them under the patient's medical plan, while others process them under dental. Because of this, verify coverage in advance and ask whether the payer wants the claim cross-coded to medical with a CPT equivalent. Confirming the path before treatment reduces denials and surprise balances.
Does D7285 require pre-authorization?
A pre-authorization is not universally required, but it is often recommended for hard-tissue biopsies because payers frequently review them. Submitting a pre-treatment estimate with the pre-operative radiograph and a short narrative confirms coverage, clarifies whether the claim routes to dental or medical, and reduces the chance of a denial on a procedure carriers commonly scrutinize.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.