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Official Description

Excision of lesion of mucosa and submucosa, vestibule of mouth; without repair

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 40810 refers to the excision of a lesion located in the mucosa and submucosa of the vestibule of the mouth, specifically performed without any subsequent repair. The vestibule of the mouth, also known as the buccal cavity or oral cavity, encompasses the mucosal and submucosal tissues of the lips and cheeks, while excluding the dentoalveolar structures. This procedure is typically indicated when a lesion is present in this area, necessitating its removal for diagnostic or therapeutic reasons. During the procedure, a local anesthetic is administered to ensure patient comfort. The surgeon identifies a margin of healthy tissue surrounding the lesion and makes an incision through both the mucosa and submucosa. The incision is carefully made around the lesion to excise it completely. After excision, the surgical site is inspected to confirm that all abnormal tissue has been removed. The excised lesion is then sent to a laboratory for histologic evaluation, which is reported separately. It is important to note that if the surgical wound is left open to heal by secondary intention, CPT® Code 40810 is used. Conversely, if the wound is closed using a simple single-layer suture technique, CPT® Code 40812 should be applied. In cases where a complex repair is necessary, which may involve extensive undermining of tissues to reduce tension on the wound, additional codes such as 40814 or 40816 may be applicable depending on the extent of the excision and the repair technique employed.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The excision of lesions in the vestibule of the mouth is typically indicated for the following conditions:

  • Lesion Removal Lesions that are suspected to be malignant or pre-malignant, requiring excision for further evaluation and treatment.
  • Symptomatic Lesions Lesions causing discomfort, pain, or functional impairment in the oral cavity.
  • Diagnostic Purposes Lesions that need to be excised for histological examination to determine the nature of the tissue.

2. Procedure

The procedure for excising a lesion of the mucosa and submucosa in the vestibule of the mouth involves several key steps:

  • Step 1: Anesthesia Administration The procedure begins with the administration of a local anesthetic to the area surrounding the lesion. This is crucial for ensuring that the patient remains comfortable and pain-free throughout the excision process.
  • Step 2: Identification of Healthy Tissue Margin The surgeon carefully identifies a margin of healthy tissue surrounding the lesion. This step is essential to ensure complete excision of the lesion while preserving as much healthy tissue as possible.
  • Step 3: Incision Creation An incision is made through the mucosa and submucosa, encircling the lesion. The incision is designed to allow for the complete removal of the lesion along with a margin of healthy tissue.
  • Step 4: Lesion Excision The surgeon excises the lesion, ensuring that all abnormal tissue is removed. This step is critical for preventing recurrence and ensuring that the lesion is adequately addressed.
  • Step 5: Wound Inspection After excision, the surgical wound is thoroughly inspected to confirm that all abnormal tissue has been successfully removed. This inspection helps to ensure the effectiveness of the procedure.
  • Step 6: Tissue Submission The excised tissue is then sent to a laboratory for histologic evaluation. This evaluation is important for determining the nature of the lesion and guiding further treatment if necessary.

3. Post-Procedure

Post-procedure care involves monitoring the surgical site for any signs of infection or complications. If the wound is left open to heal by secondary intention, the patient will be advised on proper oral hygiene and care to promote healing. In cases where sutures are used, the patient will need to return for suture removal as per the surgeon's instructions. Patients should also be informed about potential signs of complications, such as increased pain, swelling, or discharge, and advised to contact their healthcare provider if these occur. Follow-up appointments may be necessary to assess healing and discuss the results of the histologic evaluation.

Short Descr EXCISION OF MOUTH LESION
Medium Descr EXC LES MUCOSA & SBMCSL VESTIBULE MOUTH W/O RPR
Long Descr Excision of lesion of mucosa and submucosa, vestibule of mouth; without repair
Status Code Active Code
Global Days 010 - Minor Procedure
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Office-based surgical procedure added to ASC list in CY 2008 or later with MPFS nonfacility PE RVUs; payment based on MPFS nonfacility PE RVUs.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P6C - Minor procedures - other (Medicare fee schedule)
MUE 2
CCS Clinical Classification 33 - Other OR therapeutic procedures on nose, mouth and pharynx
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
RT Right side (used to identify procedures performed on the right side of the body)
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
LT Left side (used to identify procedures performed on the left side of the body)
SG Ambulatory surgical center (asc) facility service
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
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Notes
2013-01-01 Changed Medium Descriptor changed.
Pre-1990 Added Code added.
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