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    v1.0.30
    OpenPayerBilling CodesIncision Procedures on the Accessory SinusesCPT cpt-31032-maxillary-antrostomy-polypectomy
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    CPT 31032: Maxillary Antrostomy with Polypectomy

    Medicare pays $568 on average nationally for this procedure.

    CPT code 31032 describes a surgical procedure in which the provider makes a gingival incision and removes the entire mucous membrane of the maxillary antrum to improve drainage into the nasal cavity, with dissection of the anterior wall to remove a polyp and diseased material; service type: endoscopic/open maxillary antrostomy with polypectomy typical site of service: operating room or ambulatory surgical center under general or local anesthesia.

    For related coverage guidance, see recent payer policy updates: Office-based Laryngeal Procedures, Injectable Dermal Fillers and Bulking Agents (for New Mexico Only), Injectable Dermal Fillers and Bulking Agents (for Kentucky Only).

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult with chronic maxillary sinusitis and obstructive maxillary sinus polyps causing persistent nasal congestion, facial pressure, recurrent purulent nasal discharge, and failure of medical therapy (antibiotics, topical nasal steroids, saline irrigations). The patient presents to an otolaryngology clinic after 6–12 weeks of conservative treatment without durable improvement. Preoperative evaluation includes nasal endoscopy, sinus CT imaging confirming maxillary sinus mucosal disease and polyps, medical clearance, and informed consent for a transoral Caldwell-Luc type approach.

    On the day of service, the patient undergoes general anesthesia in an operating room. The surgeon makes a gingival (gum) incision in the canine-fossa region, elevates a mucoperiosteal flap, and creates an antral window. The entire diseased antral mucous membrane is removed to establish improved drainage to the nasal cavity. The anterior wall is dissected to excise polyps and remove chronic inflammatory tissue. Hemostasis is achieved, the oral mucosa is closed, and postoperative instructions include sinus precautions, antibiotics if indicated, and follow-up for nasal endoscopy and sinus care. Typical sites of service include the hospital outpatient operating room or ambulatory surgery center. Typical providers are otolaryngologists (ENT surgeons) performing operative management of refractory maxillary sinus disease.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    31276Endoscopic senotomy, maxillary sinus, with removal of tissue and/or polyp(s)Minimally invasive endoscopic alternative or adjunct; may be performed before or instead of open antral mucosal removal.

    | 31267 | Nasal/sinus endoscopy, surgical; with maxillary antrostomy | Endoscopic maxillary antrostomy is often performed in the same episode of care as antral disease management and can be staged with open approaches.

    | 30130 | Rhinoplasty, primary; including major septal repair and nasal valve surgery (example of nasal surgical codes) | Represents concurrent nasal procedures that may be performed during the same operative session if indicated (e.g., septoplasty for improved drainage).

    | 21031 | Drainage of periapical abscess, intraoral; with or without removal of tooth (example dental-related code) | Dental or odontogenic sources of maxillary sinusitis may require dental procedures before or after sinus surgery.

    | 31233 | Diagnostic nasal endoscopy, with or without collection of specimen | Used for preoperative or postoperative evaluations and intraoperative endoscopic assessment of sinus drainage.

    Related Modifiers

    10 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    51Modifier –51 (Multiple Procedures) is used when the same provider performs multiple procedures in the same session to identify secondary, non‑exempt procedures and indicate payment reduction logic…- Use modifier -51 when the same provider performs multiple distinct procedures during the same patient encounter: report the highest‑valued procedure first (no modifier) and append -51 to…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    58Modifier 58 (Staged or related procedure/service by the same physician during the postoperative period) indicates that a subsequent procedure performed by the same provider during the…- Use modifier 58 when the same physician/QHP performs a procedure during the postoperative/global period of an earlier procedure and the subsequent procedure is either planned or anticipated…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207Y00000X
    2080P0208X
    208800000X
    364S00000X
    133NN1002X
    315P00000X
    163WD1100X
    253Z00000X

    Related Payer Policy Updates

    Specialty: Otorhinolaryngology (ENT)1 / 2

    10 rows

    PolicyPayerEffective Date
    Office-based Laryngeal ProceduresPremera Bluecross2026-10-06
    Injectable Dermal Fillers and Bulking Agents (for New Mexico Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Kentucky Only)UnitedHealthcare2026-10-01
    Hearing Aids and Devices Including Wearable, Bone-Anchored, and Semi-Implantable (for Indiana Only)UnitedHealthcare2026-10-01
    Otoacoustic Emissions Testing (for Oxford Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking AgentsUnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking AgentsUnitedHealthcare2026-10-01
    Sinus Surgeries and Interventions (for North Carolina Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Nebraska Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Kansas Only)UnitedHealthcare2026-10-01

    Related Codes

    CPT-31000-MAXILLARY-SINUS-WASHOUT-IRRIGATION

    CPT 31000: Maxillary Sinus Irrigation (Antral Washout)

    CPT-31002-SPHENOID-SINUS-IRRIGATION-FLEXIBLE-CANNULA

    CPT 31002: Sphenoid Sinus Irrigation with Flexible Cannula

    CPT-31020-MIDDLE-MEATAL-SINUSOTOMY-INTRANASAL-SINUSOTOMY

    CPT 31020: Middle Meatal Sinusotomy, Intranasal Approach

    CPT-31030-MAXILLARY-ANTRUM-MUCOSAL-REMOVAL-NASOANTRAL-WINDOW

    CPT 31030: Radical Antral Mucosal Resection with Nasoantral Window

    CPT-31040-PTERYGOMAXILLARY-FOSSA-SURGERY

    CPT 31040: Surgery of the Pterygomaxillary Fossa

    CPT-31050-SPHENOID-SINUS-INCISION-BIOPSY

    CPT 31050: Sphenoid Sinus Incision with Possible Biopsy

    CPT-31051-SPHENOID-SINUS-MUCOSA-STRIPPING-POLYPECTOMY

    CPT 31051: Sphenoid Sinus Incision with Polyp Removal or Mucosal Stripping

    CPT-31070-TREPHINATION-FRONTAL-SINUS-OPENING

    CPT 31070: Frontal Sinus Trephination

    CPT-31075-FRONTAL-SINUS-EXCISION-TRANSORBITAL-APPROACH

    CPT 31075: Frontal Sinus Excision via Orbital Approach

    CPT-31080-FRONTAL-SINUS-OBLITERATION-EXTERNAL-APPROACH

    CPT 31080: Frontal Sinus Obliteration via Sub-brow Incision

    Showing 1–10 of 16

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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