What D7873 means

D7873 covers arthroscopic lavage and lysis of adhesions (of the TMJ). "D" is dental, "78" is this oral surgery (TMJ) group, and "73" is this arthroscopic lysis and lavage. Done through an arthroscope (a scope in the joint): 'lavage' = flushing/irrigating the joint; 'lysis of adhesions' = breaking up/releasing the adhesions (fibrous bands restricting the joint) — here under direct arthroscopic vision (and using instruments through the scope). So D7873 is the arthroscopic flushing and adhesion-release of the TMJ.

So it's flushing the jaw joint and breaking up its adhesions using a scope (under direct vision) — done to free a restricted joint and improve movement.

This is the arthroscopic counterpart of non-arthroscopic lysis and lavage (D7871) — the same goals (lavage + releasing adhesions) but performed arthroscopically (with the scope), which allows directly visualizing the adhesions/joint and releasing the adhesions under vision (and more precisely, using instruments). It's used for TMJ internal derangement with adhesions and restriction — for example a closed lock (a restricted joint with a stuck disc and adhesions) or other adhesion-related restriction — to free up the joint, mobilize the disc/condyle, and improve jaw opening (and reduce pain), with the benefit of arthroscopic visualization. The procedure: a diagnostic arthroscopy (D7872) typically precedes/accompanies it (entering and examining the joint), then the lavage and lysis are done through the scope — flushing the joint and releasing the adhesions (via the irrigation, instruments, and the scope-guided technique). It's minimally invasive (small punctures, no incision), under sedation or general anesthesia — a less invasive alternative to open surgery for suitable cases. It's performed by an oral and maxillofacial surgeon. This code is in the TMJ group (D7810-D7899). It's one of the surgical arthroscopy codes (D7873-D7877). TMJ-related coverage varies. Documentation of the condition and the procedure supports the claim.

When it's typically used

D7873 is reported for arthroscopic lavage and lysis of adhesions of the TMJ — using a scope to flush the joint and break up adhesions under direct vision — used for TMJ disorders with adhesions/restriction (e.g., a closed lock), to free the joint and improve movement and symptoms. It's the arthroscopic version of lysis and lavage (vs the non-arthroscopic D7871), and is among the surgical arthroscopy codes.

How much does D7873 cost?

Arthroscopic lysis and lavage is a minimally invasive (arthroscopic) procedure — less than open surgery, but involving the arthroscopic equipment and anesthesia/facility, so the total is moderate, depending on the setting (often under sedation or general anesthesia). Coverage varies (TMJ treatment is limited or excluded by some plans). Verify your specific coverage.

Is D7873 covered by insurance?

Coverage for TMJ procedures varies — some dental and medical plans limit or exclude TMJ treatment, so coverage isn't guaranteed. Documentation of the condition (the adhesions/restriction, e.g., a closed lock) and the arthroscopic lysis and lavage supports the claim, and prior conservative care is often expected. As a minimally invasive arthroscopic procedure, it may be used before open surgery. It's distinguished from the non-arthroscopic version (D7871). Preauthorization may be required. Verifying coverage helps.

Arthroscopic lysis and lavage

This procedure flushes and frees the joint via the scope, and understanding this clarifies the code.

Understanding the procedure clarifies D7873. It combines, done arthroscopically (through a scope in the joint): lavage — flushing/irrigating the joint (washing out inflammatory mediators and debris); and lysis of adhesions — breaking up/releasing the adhesions (the fibrous bands within the joint that restrict its movement). What makes it arthroscopic is that it's performed with the arthroscope — the surgeon sees inside the joint (via the scope's camera) and releases the adhesions under direct vision, often using small instruments through the scope (along with the irrigation and joint distension).

So D7873 frees the restricted joint (by releasing the adhesions) and flushes it (lavage) — addressing the restriction and the inflammation/debris — with the precision and visualization of the arthroscopic approach. The goal is to free up the joint's movement (improving the disc/condyle mobility and jaw opening) and reduce the symptoms (pain, restriction) caused by the adhesions. So arthroscopic lysis and lavage frees and flushes the joint under direct vision. Understanding this helps patients see that the procedure combines, done arthroscopically (through a scope in the joint), lavage (flushing/irrigating the joint to wash out inflammatory mediators and debris) and lysis of adhesions (breaking up/releasing the fibrous bands within the joint that restrict its movement) — what makes it arthroscopic being that it's performed with the arthroscope (the surgeon seeing inside the joint via the scope's camera and releasing the adhesions under direct vision, often using small instruments through the scope, along with the irrigation and joint distension) — so D7873 frees the restricted joint (by releasing the adhesions) and flushes it (lavage), addressing the restriction and the inflammation/debris with the precision and visualization of the arthroscopic approach, aiming to free up the joint's movement (improving the disc/condyle mobility and jaw opening) and reduce the symptoms (pain, restriction) the adhesions cause.

Arthroscopic vs non-arthroscopic (D7871)

The scope distinguishes D7873 from D7871, and understanding this clarifies the choice.

Understanding the difference between D7873 (arthroscopic) and D7871 (non-arthroscopic) lysis and lavage clarifies the choice. Both have the same goals — lavage (flushing the joint) and lysis (releasing adhesions) to free a restricted joint — but differ in technique: non-arthroscopic (D7871) — done without a scope: the adhesions are released indirectly, through the hydraulic pressure of the irrigation (distending the joint) and joint manipulation, without directly seeing them; and arthroscopic (D7873, this code) — done with a scope: the surgeon directly visualizes the joint and the adhesions (via the arthroscope) and releases them under direct vision (and can use instruments), with the lavage.

The arthroscopic approach (D7873) adds direct visualization — the surgeon sees what they're doing inside the joint, which can allow more targeted/thorough release of adhesions and assessment of the joint (since it includes seeing inside, as in the diagnostic arthroscopy). The non-arthroscopic approach (D7871) is simpler (no scope) but works 'blind' (by pressure/manipulation). The choice depends on the case, the surgeon's judgment/expertise, and the equipment — both aim to free the restricted joint. So D7873 is the scope-guided version, D7871 the non-scope version. Understanding this helps patients see that both D7873 (arthroscopic) and D7871 (non-arthroscopic) lysis and lavage have the same goals (lavage to flush the joint and lysis to release adhesions, freeing a restricted joint) but differ in technique — non-arthroscopic (D7871) done without a scope (the adhesions released indirectly through the hydraulic pressure of the irrigation and joint manipulation, without directly seeing them) versus arthroscopic (D7873, this code) done with a scope (the surgeon directly visualizing the joint and adhesions via the arthroscope and releasing them under direct vision, using instruments, with the lavage) — so the arthroscopic approach adds direct visualization (allowing more targeted/thorough release and joint assessment) while the non-arthroscopic approach is simpler but works 'blind' (by pressure/manipulation), the choice depending on the case, the surgeon's judgment/expertise, and the equipment, both aiming to free the restricted joint.

A minimally invasive alternative to open surgery

Arthroscopic lysis and lavage avoids open surgery for suitable cases, and understanding this clarifies its value.

Understanding the value of the arthroscopic approach clarifies D7873. Arthroscopic lysis and lavage is a minimally invasive way to treat certain TMJ problems (adhesions/restriction, e.g., a closed lock) that achieves the therapeutic goal — freeing the joint, improving movement — without open surgery (an arthrotomy). The benefits of the minimally invasive (arthroscopic) approach include: small punctures instead of an incision (less tissue disruption); generally less postoperative pain and faster recovery than open surgery; and the visualization/treatment combined (diagnosing and treating in one minimally invasive procedure). So for suitable cases, arthroscopy offers effective treatment with less invasiveness.

This is why arthroscopic procedures (like D7873) are often preferred over open surgery when they can address the problem — reserving open surgery (arthrotomy and the open procedures) for cases that need it (more extensive disease/repair). In the overall treatment ladder, arthroscopic lysis and lavage (and the other arthroscopic procedures) sit between the non-scope procedures (arthrocentesis/non-arthroscopic lysis and lavage) and open surgery. So D7873 is a minimally invasive alternative to open surgery for appropriate cases. Understanding this helps patients see that arthroscopic lysis and lavage is a minimally invasive way to treat certain TMJ problems (adhesions/restriction, e.g., a closed lock) that achieves the therapeutic goal (freeing the joint, improving movement) without open surgery (an arthrotomy) — the benefits including small punctures instead of an incision (less tissue disruption), generally less postoperative pain and faster recovery than open surgery, and the visualization/treatment combined (diagnosing and treating in one minimally invasive procedure) — which is why arthroscopic procedures (like D7873) are often preferred over open surgery when they can address the problem (reserving open surgery for cases that need it, with more extensive disease/repair), sitting in the treatment ladder between the non-scope procedures (arthrocentesis/non-arthroscopic lysis and lavage) and open surgery.

Where D7873 fits in the codes

D7873 is one of the surgical arthroscopy codes, and understanding this clarifies the coding.

D7873 is one of the surgical arthroscopy codes in the TMJ group (D7810-D7899) — and understanding this clarifies the coding. The arthroscopy subgroup is: diagnostic — D7872 (arthroscopy for diagnosis, with/without biopsy); and surgical — the procedures done through the scope: lavage and lysis of adhesions (D7873, this code), disc repositioning and stabilization (D7874), synovectomy (D7875), discectomy (D7876), and debridement (D7877). So D7873 is the arthroscopic lysis-and-lavage among the surgical arthroscopy codes.

Each surgical arthroscopy code (D7873-D7877) is the arthroscopic version of a procedure that also has an open counterpart — e.g., D7873 (arthroscopic lysis/lavage) ~ D7871 (non-arthroscopic) / the lavage concept; D7874 (arthroscopic disc repositioning) ~ D7852 (open disc repair); D7875 (arthroscopic synovectomy) ~ D7854 (open synovectomy); D7876 (arthroscopic discectomy) ~ D7850 (open discectomy). The surgeon codes D7873 when lysis and lavage is done arthroscopically (vs D7871 non-arthroscopically, or open surgery). So D7873 is the arthroscopic lysis and lavage in the TMJ group. Understanding this helps patients see that D7873 is one of the surgical arthroscopy codes in the TMJ group (D7810-D7899) — the arthroscopy subgroup being diagnostic (D7872, arthroscopy for diagnosis, with/without biopsy) and surgical (the procedures done through the scope: lavage and lysis of adhesions D7873 (this code), disc repositioning and stabilization D7874, synovectomy D7875, discectomy D7876, debridement D7877) — so D7873 is the arthroscopic lysis-and-lavage, each surgical arthroscopy code (D7873-D7877) being the arthroscopic version of a procedure with an open counterpart (D7874 ~ open disc repair D7852, D7875 ~ open synovectomy D7854, D7876 ~ open discectomy D7850), the surgeon coding D7873 when lysis and lavage is done arthroscopically (versus D7871 non-arthroscopically or open surgery).

Frequently asked questions

What is the D7873 dental code?

It's arthroscopic lavage and lysis of adhesions of the temporomandibular joint (TMJ) — using an arthroscope (a scope in the joint) to flush (lavage) the joint and break up/release adhesions (lysis) under direct vision. It's done for TMJ disorders with adhesions/restriction (like a closed lock), to free the joint and improve movement.

What's the difference from the non-arthroscopic version (D7871)?

Both flush the joint and release adhesions, but D7873 is done arthroscopically (with a scope — the surgeon sees inside and releases the adhesions under direct vision, using instruments) while D7871 is non-arthroscopic (no scope — the adhesions released indirectly by the hydraulic pressure of irrigation and manipulation, working 'blind').

What are adhesions?

Adhesions are abnormal fibrous bands or sticking that can form within the joint (e.g., from inflammation, internal derangement, or prior problems), restricting the joint's movement. 'Lysis of adhesions' means breaking these up/releasing them to free the joint — done here under arthroscopic vision.

How does it help?

By releasing the adhesions (freeing the joint) and flushing it (washing out inflammatory mediators and debris), it improves the joint's movement (the disc/condyle mobility and jaw opening) and reduces the symptoms (pain, restriction) the adhesions cause — with the precision and visualization of the arthroscopic approach. It's often used for a closed lock or adhesion-related restriction.

Why use arthroscopy instead of open surgery?

Arthroscopic lysis and lavage achieves the goal (freeing the joint) without open surgery — with small punctures instead of an incision, generally less postoperative pain and faster recovery, and the diagnosis/treatment combined in one minimally invasive procedure. Open surgery is reserved for cases that need it (more extensive disease/repair).

What does it cost, and what insurance applies?

It's a minimally invasive arthroscopic procedure (less than open surgery), but involves the arthroscopic equipment and anesthesia/facility, so the total is moderate, depending on the setting (often under sedation or general anesthesia). Coverage for TMJ procedures varies (some plans limit or exclude TMJ treatment). 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.