What D7860 means

D7860 covers an arthrotomy (of the TMJ). "D" is dental, "78" is this oral surgery (TMJ) group, and "60" is this arthrotomy. 'Arthro-' means joint and '-tomy' means cutting/incision; so an arthrotomy is the surgical cutting into (opening of) a joint. For the TMJ, an arthrotomy is the open surgical procedure of incising into the joint to access its interior (the joint spaces, the disc, the condyle's surface, etc.). It's the 'open joint surgery' approach (as opposed to arthroscopy, which accesses the joint minimally invasively through tiny punctures). So D7860 is the surgical opening of the TMJ.

So it's surgically opening the jaw joint to access its interior — for inspecting/exploring it or as the access for an open joint procedure.

An arthrotomy is performed to gain open surgical access to the inside of the TMJ — for example: to explore/inspect the joint — opening it to directly visualize and assess the internal structures (the disc, the joint surfaces, the synovium) — e.g., when the diagnosis or the joint's condition needs direct examination; and as the access for an open joint procedure — many open TMJ surgeries (e.g., disc repair/removal, addressing the joint surfaces, removing loose bodies, etc.) require opening the joint via an arthrotomy to perform them. Typically the joint is accessed through an incision in front of the ear (a preauricular approach), carefully avoiding nearby structures (notably the facial nerve), then the joint capsule is opened to enter the joint. When D7860 is reported on its own, it generally reflects the arthrotomy as the procedure (e.g., an open exploration); when an arthrotomy is the access for a specific named open procedure (like a discectomy, D7850), that specific procedure is typically what's coded. It's a surgical procedure performed by an oral and maxillofacial surgeon, under general anesthesia. This code is in the TMJ group (D7810-D7899). It contrasts with the arthroscopic procedures (D7872-D7877) and with arthrocentesis (D7870, a needle procedure). TMJ-related coverage varies. Documentation of the indication and the procedure supports the claim.

When it's typically used

D7860 is reported for an arthrotomy of the TMJ — surgically opening (incising into) the joint to access its interior — for example to explore/inspect the joint directly, or as the open-surgical access for a joint procedure. It's the open joint surgery approach, distinct from the minimally invasive arthroscopy (D7872-D7877) and from arthrocentesis (D7870, a needle procedure). When the arthrotomy is the access for a specific named open procedure, that procedure may be the code used.

How much does D7860 cost?

An arthrotomy is a surgical (open joint) procedure — some fee schedules list an allowance around 940 USD for the surgical code, with the total (including hospital/facility and general anesthesia) higher. If it's the access for a larger named procedure, that procedure's coding/cost applies. Coverage varies (TMJ treatment is limited or excluded by some plans). Verify your specific coverage.

Is D7860 covered by insurance?

Coverage for TMJ surgery varies — some dental and medical plans limit or exclude TMJ treatment, so coverage isn't guaranteed. Documentation of the indication (why the joint is being opened — e.g., for exploration or as access for a procedure) and the arthrotomy supports the claim, and prior more-conservative treatment is often expected before open surgery. Preauthorization is usually required. It's distinguished from arthroscopy (D7872-D7877) and arthrocentesis (D7870). Verifying coverage helps.

Opening the joint

An arthrotomy surgically opens the joint, and understanding this clarifies the code.

Understanding what an arthrotomy is clarifies D7860. 'Arthrotomy' = 'arthro-' (joint) + '-tomy' (cutting) — so it's the surgical cutting into, or opening of, a joint. For the TMJ, an arthrotomy means making a surgical incision to open the jaw joint and access its interior — the joint spaces (the upper and lower compartments), the articular disc, the surfaces of the condyle and the fossa, and the synovial lining. So it provides open access to the inside of the joint.

This is 'open joint surgery' — directly opening the joint (as opposed to arthroscopy, which accesses the joint through tiny punctures with a scope, or arthrocentesis, which uses needles without really opening it). Opening the joint allows direct visualization and access to perform procedures within it under direct vision. So an arthrotomy is the surgical opening of the joint. Understanding this helps patients see that an arthrotomy ('arthro-' meaning joint + '-tomy' meaning cutting) is the surgical opening of a joint — for the TMJ, making a surgical incision to open the jaw joint and access its interior (the joint spaces, the articular disc, the surfaces of the condyle and the fossa, and the synovial lining) — so it provides open access to the inside of the joint ('open joint surgery,' as opposed to arthroscopy, which accesses the joint through tiny punctures with a scope, or arthrocentesis, which uses needles without really opening it), allowing direct visualization and access to perform procedures within the joint under direct vision.

The preauricular approach and the facial nerve

The joint is accessed in front of the ear, near the facial nerve, and understanding this clarifies the surgery.

Understanding how the joint is accessed clarifies the arthrotomy. The TMJ sits just in front of the ear (you can feel it move there when you open and close your mouth). So the open surgical access (arthrotomy) is typically through a preauricular approach — an incision in front of the ear (often hidden in the natural skin creases/the front of the ear), through which the surgeon carefully dissects down to the joint capsule and opens it to enter the joint. (Variations of this approach exist.) A key consideration is the facial nerve: the facial nerve (which controls the muscles of facial expression) and its branches run in the region near the TMJ. So during the approach, the surgeon must carefully protect the facial nerve (and its branches) to avoid injuring it (which could cause weakness of facial movements).

This careful dissection (protecting the facial nerve and other nearby structures — vessels, the ear structures) is an important part of the surgery, and is one reason open TMJ surgery is reserved for situations that warrant it (vs less invasive options). So the arthrotomy uses a careful preauricular approach mindful of the facial nerve. Understanding this helps patients see that the TMJ sits just in front of the ear, so the open surgical access (arthrotomy) is typically through a preauricular approach (an incision in front of the ear, often hidden in the natural skin creases, through which the surgeon dissects down to the joint capsule and opens it) — with a key consideration being the facial nerve (which controls facial expression and runs, with its branches, in the region near the TMJ), so the surgeon must carefully protect the facial nerve and its branches to avoid injuring it (which could cause facial-movement weakness) — this careful dissection (protecting the facial nerve and other nearby structures) being an important part of the surgery and one reason open TMJ surgery is reserved for situations that warrant it.

Exploration vs access for a procedure

An arthrotomy may be for exploration or to enable another procedure, and understanding this clarifies its use.

Understanding the two senses of an arthrotomy clarifies how D7860 is used. Opening the joint (an arthrotomy) can serve: as an exploration/inspection itself — opening the joint to directly visualize and assess its internal structures (the disc, the joint surfaces, the synovium, any abnormalities) — e.g., a diagnostic/exploratory arthrotomy when direct examination of the joint is needed; and as the access for an open joint procedure — most open TMJ surgeries require opening the joint to perform them, so the arthrotomy is the access through which a specific procedure (disc surgery, addressing the surfaces, removing loose bodies, etc.) is done.

This affects coding: when the arthrotomy is essentially the procedure (e.g., an open exploration), D7860 reflects it; when the arthrotomy is the access for a specific named procedure (like a discectomy, D7850, or disc repair, D7852), that specific procedure is typically the code reported (the opening being part of performing it), rather than separately coding the arthrotomy. So D7860 is reported for the arthrotomy as a procedure (e.g., exploration), while a named open procedure is coded by its own code. The provider codes based on what's actually done. Understanding this helps patients see that opening the joint (an arthrotomy) can serve as an exploration/inspection itself (opening the joint to directly visualize and assess its internal structures, e.g., a diagnostic/exploratory arthrotomy when direct examination is needed) or as the access for an open joint procedure (most open TMJ surgeries requiring opening the joint, so the arthrotomy is the access through which a specific procedure is performed) — which affects coding: when the arthrotomy is essentially the procedure (e.g., an open exploration), D7860 reflects it, but when it's the access for a specific named procedure (like a discectomy D7850 or disc repair D7852), that specific procedure is typically the code reported (the opening being part of performing it) — so the provider codes based on what's actually done.

Where D7860 fits in the codes

D7860 is the open-joint-access code among the TMJ surgeries, and understanding this clarifies the coding.

D7860 relates to the joint-access methods in the TMJ group — and understanding this clarifies the coding. The TMJ group (D7810-D7899) includes different ways to access/treat the joint, varying in invasiveness: arthrocentesis (D7870) — the least invasive joint procedure: needles into the joint to flush it (lavage), no real opening; arthroscopy (D7872-D7877) — minimally invasive: a small scope through tiny punctures, for diagnosis (D7872) and surgical procedures (lysis/lavage D7873, disc repositioning D7874, synovectomy D7875, discectomy D7876, debridement D7877); and arthrotomy (D7860, this code) — open joint surgery: surgically opening the joint for direct access. So the access methods range from arthrocentesis (needles) to arthroscopy (scope) to arthrotomy (open).

D7860 specifically is the arthrotomy — the open access. The various open joint procedures (condylectomy D7840, discectomy D7850, disc repair D7852, synovectomy D7854, arthroplasty D7865, reconstruction D7858) are performed through an arthrotomy. The surgeon codes D7860 for an arthrotomy as a procedure (e.g., exploration), or codes the specific open procedure (which includes the opening) when one is done. So D7860 is the open-joint-access (arthrotomy) code in the TMJ group. Understanding this helps patients see that D7860 relates to the joint-access methods in the TMJ group (D7810-D7899), which range in invasiveness — arthrocentesis (D7870, the least invasive: needles to flush the joint, no real opening), arthroscopy (D7872-D7877, minimally invasive: a small scope through tiny punctures, for diagnosis and surgical procedures), and arthrotomy (D7860, this code: open joint surgery, surgically opening the joint for direct access) — so D7860 specifically is the arthrotomy (the open access), through which the various open joint procedures (condylectomy D7840, discectomy D7850, disc repair D7852, synovectomy D7854, arthroplasty D7865, reconstruction D7858) are performed, coded for an arthrotomy as a procedure (e.g., exploration) or via the specific open procedure's code (which includes the opening) when one is done.

Frequently asked questions

What is the D7860 dental code?

It's an arthrotomy of the temporomandibular joint (TMJ) — the surgical opening (incision into) the joint to access its interior. 'Arthrotomy' means cutting into a joint; it's the open joint surgery access to the TMJ, done to inspect/explore the joint or as the access for performing an open joint procedure.

What does 'arthrotomy' mean?

'Arthro-' means joint and '-tomy' means cutting — so an arthrotomy is the surgical cutting into (opening of) a joint. For the TMJ, it means making a surgical incision to open the jaw joint and access its interior (the joint spaces, the disc, the joint surfaces, the synovium). It's the 'open joint surgery' approach.

How is the joint accessed?

Typically through a preauricular approach — an incision in front of the ear (where the TMJ sits) — through which the surgeon dissects down to and opens the joint capsule. A key consideration is carefully protecting the facial nerve (which controls facial expression and runs near the TMJ) and other nearby structures during the approach.

How is it different from arthroscopy or arthrocentesis?

An arthrotomy is open joint surgery (surgically opening the joint). Arthroscopy (D7872-D7877) is minimally invasive — a small scope through tiny punctures. Arthrocentesis (D7870) is the least invasive — needles into the joint to flush it, without really opening it. The arthrotomy provides full open access for direct procedures.

Is the arthrotomy always coded separately?

Not always. When the arthrotomy is essentially the procedure (e.g., an open exploration), D7860 reflects it. But when the arthrotomy is the access for a specific named open procedure (like a discectomy, D7850), that specific procedure is typically the code reported (the opening being part of performing it). The provider codes based on what's done.

What does it cost, and what insurance applies?

It's an open joint surgery — some fee schedules list around 940 USD for the surgical code, with the total (including hospital/facility and general anesthesia) higher. Coverage for TMJ surgery varies (some plans limit or exclude TMJ treatment); preauthorization and prior conservative treatment are often expected. Verify your specific coverage.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.