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Official Description

Drainage of abscess, cyst, hematoma, vestibule of mouth; simple

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 40800 involves the drainage of an abscess, cyst, or hematoma located in the vestibule of the mouth, which is the area between the lips and the gums. This region, also known as the buccal cavity, encompasses the mucosal and submucosal tissues of the lips and cheeks, while excluding the dentoalveolar structures such as teeth and their supporting tissues. The procedure begins with the identification of the abscess, cyst, or hematoma, followed by the administration of a local anesthetic to ensure patient comfort during the intervention. Once the area is adequately anesthetized, the mucosal tissue is incised to access the underlying pathological structure. The abscess pocket, cyst, or hematoma is then opened to allow for drainage of its contents. In cases where the abscess has loculations, these are carefully broken up to facilitate complete drainage. If a hematoma is present, any blood clots are removed to promote effective healing. After the drainage is completed, the incision may be closed or left open to heal by secondary intention, depending on the specific circumstances of the procedure. It is important to note that for more complicated cases requiring deeper dissection, gauze packing, or the placement of a drain, CPT® Code 40801 should be utilized instead.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 40800 is indicated for the following conditions:

  • Abscess A localized collection of pus that can cause pain, swelling, and inflammation in the vestibule of the mouth.
  • Cyst A closed sac-like structure filled with fluid or semi-solid material that may cause discomfort or swelling in the oral cavity.
  • Hematoma A localized collection of blood outside of blood vessels, often resulting from trauma, which can lead to swelling and pain in the vestibular area.

2. Procedure

The procedure for drainage of an abscess, cyst, or hematoma in the vestibule of the mouth involves several key steps:

  • Step 1: Identification The healthcare provider first identifies the presence of an abscess, cyst, or hematoma in the vestibule of the mouth. This may involve a physical examination and assessment of symptoms such as swelling, pain, or discomfort.
  • Step 2: Anesthesia Once the lesion is identified, a local anesthetic is administered to the area to ensure that the patient remains comfortable and pain-free during the procedure.
  • Step 3: Incision After the area is anesthetized, the mucosal tissue is carefully incised to access the abscess pocket, cyst, or hematoma. This incision allows for direct drainage of the contents.
  • Step 4: Drainage The abscess pocket, cyst, or hematoma is then opened, and the contents are drained. If the abscess has loculations, these are broken up to ensure complete drainage of the infected material.
  • Step 5: Removal of Clots In cases of hematoma, any blood clots present are removed to facilitate proper healing and prevent further complications.
  • Step 6: Closure Finally, the incision may be closed or left open to heal by secondary intention, depending on the specific nature of the procedure and the clinician's judgment.

3. Post-Procedure

Post-procedure care for patients undergoing drainage of an abscess, cyst, or hematoma in the vestibule of the mouth typically includes monitoring for signs of infection, managing pain, and ensuring proper oral hygiene. Patients may be advised to avoid certain foods or activities that could irritate the area during the healing process. Follow-up appointments may be necessary to assess healing and determine if further intervention is required. If the incision was left open, instructions on how to care for the wound to promote healing by secondary intention will be provided.

Short Descr DRAINAGE OF MOUTH LESION
Medium Descr DRG ABSC CST HMTMA VESTIBULE MOUTH SMPL
Long Descr Drainage of abscess, cyst, hematoma, vestibule of mouth; simple
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 Procedure or Service, Multiple Reduction Applies
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
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).
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.)
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
47 Anesthesia by surgeon: regional or general anesthesia provided by the surgeon may be reported by adding modifier 47 to the basic service. (this does not include local anesthesia.) note: modifier 47 would not be used as a modifier for the anesthesia procedures.
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.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient 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).
54 Surgical care only: when 1 physician or other qualified health care professional performs a surgical procedure and another provides preoperative and/or postoperative management, surgical services may be identified by adding modifier 54 to the usual procedure number.
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.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 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.)
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
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
GJ "opt out" physician or practitioner emergency or urgent service
GW Service not related to the hospice patient's terminal condition
GX Notice of liability issued, voluntary under payer policy
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
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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