What D7941 means

D7941 covers an osteotomy of the mandibular rami. "D" is dental, "79" is this oral surgery area, and "41" is this mandibular rami osteotomy. 'Osteotomy' = 'osteo-' (bone) + '-tomy' (cutting) — a surgical cutting of bone (here, to reposition it). The 'mandibular rami' (singular: ramus) are the vertical portions of the mandible (lower jaw) at the back — the upright parts that rise toward the jaw joints, behind the tooth-bearing body of the jaw. So D7941 is cutting through the rami of the lower jaw to reposition the lower jaw.

So it's surgically cutting the back/vertical portions of the lower jaw to move the lower jaw into a corrected position — a key procedure in corrective jaw surgery.

An osteotomy of the mandibular rami is one of the most common orthognathic procedures for the lower jaw — used to reposition the mandible (move it forward, backward, or correct asymmetry) to correct a jaw deformity/malocclusion. By cutting the bone in the ramus region, the tooth-bearing portion of the lower jaw can be moved to a new position (and then fixed there), correcting conditions like: mandibular retrognathia (a lower jaw set too far back — a 'weak chin'/overbite-type deformity) — advancing the jaw; mandibular prognathism (a lower jaw too far forward — an underbite) — setting the jaw back; and asymmetry — correcting a deviated/asymmetric jaw. A common technique in this region is the bilateral sagittal split osteotomy (BSSO) — splitting each ramus in a way that allows the jaw to be repositioned with good bony overlap for healing. The code includes the full procedure: the surgical exposure, the bone cut, the fixation (holding the repositioned bone with plates/screws or wires), the routine wound closure, and the normal post-operative follow-up care. It's done under general anesthesia, typically as part of a planned orthognathic (often combined surgical-orthodontic) treatment. (D7943 is the version that also includes a bone graft and obtaining it.) It's performed by an oral and maxillofacial surgeon. These procedures are frequently medically necessary, so medical coverage often applies. This code is in the orthognathic surgery area (D7940-D7949). Documentation supports the claim.

When it's typically used

D7941 is reported for an osteotomy of the mandibular rami — surgically cutting through the rami (the vertical/back portions of the lower jaw) to reposition the lower jaw — as part of orthognathic surgery to correct a jaw deformity/malocclusion (e.g., advancing or setting back the lower jaw, or correcting asymmetry). It includes the exposure, bone cut, fixation, closure, and routine post-op care. (D7943 is the version with a bone graft.)

How much does D7941 cost?

An osteotomy of the mandibular rami is a major orthognathic surgical procedure (under general anesthesia, in a surgical facility) — its cost is significant, often in the multiple-thousands range (and frequently part of a larger orthognathic surgery, possibly with a maxillary procedure too). Sample fee-schedule values are in the four-figure range (varying by region/case). As it's frequently medically necessary, medical coverage often applies. Verify your specific coverage.

Is D7941 covered by insurance?

An osteotomy of the mandibular rami (orthognathic surgery) is frequently medically necessary — correcting functional jaw deformities (the bite, chewing, sometimes breathing) and significant skeletal deformities — so it's often covered under medical benefits (check both medical and dental plans; many have specific orthognathic-surgery medical-necessity criteria). Documentation of the deformity, the functional impairment, and the medical necessity is essential, and preauthorization is typically required. Verifying coverage and criteria helps.

Cutting the bone to reposition the jaw

An osteotomy moves the jaw by cutting the bone, and understanding this clarifies the code.

Understanding what an osteotomy does clarifies D7941. An osteotomy is a surgical bone cut made to reposition a bone or bone segment. For the lower jaw, cutting through the mandibular rami (the vertical back portions of the jaw) frees the tooth-bearing body of the lower jaw so it can be moved to a new, corrected position — and then fixed there to heal. This is how the lower jaw's position is surgically corrected: the bone is cut (the osteotomy), the jaw segment is repositioned (moved forward, backward, or rotated to correct the deformity), and it's fixed in the new position (held with plates and screws, or wires) while the bone heals.

The ramus region is used because cutting there allows the whole tooth-bearing portion of the jaw to be repositioned as a unit (without disturbing the teeth), and it's away from the front of the jaw. A widely used technique is the bilateral sagittal split osteotomy (BSSO) — the bone is split lengthwise (sagittally) in each ramus in a way that creates overlapping bone surfaces, so when the jaw is repositioned there's good bone-to-bone contact for healing and stable fixation. So the osteotomy repositions the jaw by cutting and moving the bone. Understanding this helps patients see that an osteotomy is a surgical bone cut made to reposition a bone or bone segment, and for the lower jaw, cutting through the mandibular rami (the vertical back portions) frees the tooth-bearing body of the lower jaw so it can be moved to a new, corrected position and then fixed there to heal — so the jaw's position is surgically corrected by cutting the bone (the osteotomy), repositioning the jaw segment (moving it forward, backward, or rotating it to correct the deformity), and fixing it in the new position (with plates and screws, or wires) while it heals — the ramus region being used because cutting there lets the whole tooth-bearing portion be repositioned as a unit (without disturbing the teeth) and is away from the front of the jaw, with a widely used technique being the bilateral sagittal split osteotomy/BSSO (the bone split lengthwise/sagittally in each ramus to create overlapping surfaces, giving good bone contact for healing and stable fixation when the jaw is repositioned).

What it corrects

It repositions the lower jaw to correct deformities, and understanding this clarifies the indications.

Understanding what D7941 corrects clarifies its indications. By repositioning the lower jaw, a mandibular rami osteotomy corrects jaw deformities/malocclusions involving the lower jaw's position: mandibular retrognathia / deficiency — a lower jaw that's too far back or underdeveloped (a 'recessive' lower jaw and weak chin, often with an overbite-type malocclusion) — the osteotomy advances the lower jaw forward to a normal position (which also improves the chin/profile and can help the airway); mandibular prognathism / excess — a lower jaw that's too far forward (an underbite, where the lower teeth are ahead of the upper) — the osteotomy sets the lower jaw back to correct the underbite; and asymmetry — a lower jaw that's deviated or asymmetric (one side longer, or the jaw shifted to one side) — the osteotomy repositions it to correct the asymmetry.

In each case, moving the lower jaw to the correct position fixes the underlying skeletal discrepancy — improving the bite (so the teeth meet properly), the function (chewing, sometimes breathing), and the facial balance. This is often combined with a maxillary (upper jaw) procedure in 'double-jaw' surgery when both jaws need correction. So D7941 corrects lower-jaw position deformities. Understanding this helps patients see that by repositioning the lower jaw, a mandibular rami osteotomy corrects jaw deformities/malocclusions involving the lower jaw's position — mandibular retrognathia/deficiency (a lower jaw too far back or underdeveloped, a recessive jaw and weak chin, often with an overbite-type malocclusion, the osteotomy advancing the jaw forward to a normal position, which also improves the chin/profile and can help the airway), mandibular prognathism/excess (a lower jaw too far forward, an underbite with the lower teeth ahead of the upper, the osteotomy setting the jaw back to correct it), and asymmetry (a deviated or asymmetric lower jaw, the osteotomy repositioning it) — so in each case moving the lower jaw to the correct position fixes the underlying skeletal discrepancy (improving the bite, function, and facial balance), often combined with a maxillary procedure in 'double-jaw' surgery when both jaws need correction.

What the code includes

The code covers the whole surgical procedure, and understanding this clarifies its scope.

Understanding what D7941 includes clarifies its scope. The code's descriptor specifies that the osteotomy (surgical section of the jaw) includes the full set of steps of the procedure: the surgical exposure — accessing the bone (the incision and exposure to reach the ramus, typically from inside the mouth); the bone cut(s) — the osteotomy itself (cutting/splitting the bone in the ramus region); the fixation — securing the repositioned bone in its new position (with plates and screws, or wires — internal fixation that holds the bone while it heals); the routine wound closure — closing the surgical site; and the normal post-operative follow-up care — the standard aftercare for the procedure.

So D7941 is a comprehensive code covering the whole procedure (not just the bone cut) — from exposure through fixation, closure, and routine follow-up. This means the standard components of the surgery are bundled into the one code. (Additional/separate procedures — like a bone graft, which is included in the related D7943, or a separate procedure on the other jaw — are coded separately as appropriate.) Knowing this helps patients understand the code represents the complete osteotomy procedure. So D7941 includes the exposure, cut, fixation, closure, and follow-up. Understanding this helps patients see that the code's descriptor specifies the osteotomy (surgical section of the jaw) includes the full set of steps — the surgical exposure (accessing the bone, the incision and exposure to reach the ramus, typically from inside the mouth), the bone cut(s) (the osteotomy itself, cutting/splitting the bone in the ramus region), the fixation (securing the repositioned bone in its new position with plates and screws, or wires — internal fixation holding the bone while it heals), the routine wound closure (closing the surgical site), and the normal post-operative follow-up care (the standard aftercare) — so D7941 is a comprehensive code covering the whole procedure (not just the bone cut), from exposure through fixation, closure, and routine follow-up, with the standard components bundled into the one code (and additional/separate procedures, like a bone graft included in D7943, or a procedure on the other jaw, coded separately).

Where D7941 fits in the codes

D7941 is a core mandibular orthognathic code, and understanding this clarifies the coding.

Understanding where D7941 sits clarifies the coding. D7941 is among the orthognathic surgery codes (D7940-D7949) — specifically the lower-jaw (mandibular) osteotomy codes: mandibular rami osteotomy (D7941, this code) — the ramus osteotomy to reposition the lower jaw (e.g., a BSSO); mandibular rami osteotomy with bone graft (D7943) — the same, but including a bone graft (and obtaining it) — used when a graft is needed (e.g., for a large advancement where a gap needs grafting); segmented or subapical osteotomy (D7944) — repositioning a segment of the jaw (a portion with several teeth) rather than the whole jaw — per sextant or quadrant; and body of mandible osteotomy (D7945) — an osteotomy through the body (the tooth-bearing horizontal portion) of the mandible. The maxillary (upper jaw) osteotomies are the LeFort codes (D7946-D7949).

So D7941 is the standard ramus osteotomy for repositioning the whole lower jaw — the workhorse mandibular orthognathic procedure. The surgeon codes D7941 for a ramus osteotomy (or D7943 if a graft is included, D7944 for a segmental osteotomy, D7945 for a body osteotomy), plus the maxillary code(s) if the upper jaw is also operated. So D7941 is a core mandibular orthognathic code. Understanding this helps patients see that D7941 is among the orthognathic surgery codes (D7940-D7949), specifically the lower-jaw (mandibular) osteotomy codes — mandibular rami osteotomy (D7941, this code — the ramus osteotomy to reposition the lower jaw, e.g., a BSSO), mandibular rami osteotomy with bone graft (D7943 — the same but including a bone graft and obtaining it, used when a graft is needed, e.g., for a large advancement where a gap needs grafting), segmented or subapical osteotomy (D7944 — repositioning a segment of the jaw rather than the whole jaw, per sextant or quadrant), and body of mandible osteotomy (D7945 — an osteotomy through the body/tooth-bearing horizontal portion) — with the maxillary osteotomies being the LeFort codes (D7946-D7949) — so D7941 is the standard ramus osteotomy for repositioning the whole lower jaw (the workhorse mandibular orthognathic procedure), coded for a ramus osteotomy (or D7943 if a graft is included, D7944 for a segmental, D7945 for a body osteotomy), plus the maxillary code(s) if the upper jaw is also operated.

Frequently asked questions

What is the D7941 dental code?

It's an osteotomy of the mandibular rami — surgically cutting through the rami (the vertical/back portions of the lower jaw) to reposition the lower jaw, as part of orthognathic (corrective jaw) surgery. It's a common procedure to move the lower jaw forward or back (correcting an underbite, overbite, or asymmetry). The code includes the exposure, bone cut, fixation, closure, and routine post-op care.

What does 'osteotomy of the mandibular rami' mean?

An 'osteotomy' is a surgical bone cut (to reposition bone). The 'mandibular rami' are the vertical portions of the lower jaw at the back (rising toward the jaw joints, behind the tooth-bearing body). So it's cutting through these back portions of the lower jaw to free and reposition the tooth-bearing part of the jaw into a corrected position.

What does it correct?

Lower-jaw position deformities — a lower jaw too far back/underdeveloped (advancing it forward, improving an overbite-type bite, the chin, and sometimes the airway), a lower jaw too far forward (an underbite — setting it back), or an asymmetric/deviated jaw (repositioning it). Moving the jaw to the correct position fixes the skeletal discrepancy, improving the bite and facial balance.

What is a BSSO?

A bilateral sagittal split osteotomy — a widely used technique for the mandibular rami osteotomy. The bone is split lengthwise (sagittally) in each ramus in a way that creates overlapping bone surfaces, so when the jaw is repositioned there's good bone-to-bone contact for healing and stable internal fixation (plates/screws). It's the common way this osteotomy is done.

What's included in the code?

The full procedure — the surgical exposure (accessing the bone), the bone cut (the osteotomy), the fixation (securing the repositioned bone with plates/screws or wires), the routine wound closure, and the normal post-operative follow-up care. So D7941 covers the whole osteotomy procedure, not just the bone cut. (A bone graft is included in the related code D7943.)

What does it cost, and is it covered?

It's a major orthognathic surgery (under general anesthesia, in a surgical facility) — cost is significant, often in the multiple-thousands range, and frequently part of a larger orthognathic surgery. As it's frequently medically necessary (correcting functional jaw deformities), medical coverage often applies (check both plans; many have specific criteria, and preauthorization is typically required). Verify your 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.