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    OpenPayerBilling CodesIncision Procedures on the Salivary Gland and DuctsCPT cpt-42320-submaxillary-salivary-gland-abscess-drainage-external-approach
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    CPT 42320: External Drainage of Submaxillary Salivary Gland

    Medicare pays $270 on average nationally for this procedure.

    CPT code 42320 describes an external surgical approach for drainage of purulent material from a submaxillary (submandibular) salivary gland; this represents a minor surgical drainage procedure performed in an operating room or procedure suite and is classified as a surgical service for management of salivary gland abscess or purulence via an extraoral incision and drainage technique.

    For related coverage guidance, see recent payer policy updates: Orthopedic Joint Procedures of the Knee for Managed Medicaid (MMC), Health and Recovery Plan (HARP), Child Health Plus (CHP), and Essential Plan (EP) Members, Autologous Chondrocyte Transplantation or Implantation Corporate Medical Policy, Autologous Platelet-Derived Growth Factors (Platelet-Rich Plasma [PRP]).

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult presenting to the emergency department or outpatient surgical clinic with acute submandibular (submaxillary) gland swelling, pain, fever, and fluctuance consistent with suppurative sialadenitis or a localized salivary gland abscess. Common predisposing factors include sialolithiasis obstructing the Wharton duct, dehydration, recent ductal instrumentation, xerostomia, or immunocompromise. Initial evaluation includes history, focused head and neck exam, point-of-care ultrasound or formal neck ultrasound to confirm a fluid collection, and laboratory studies (CBC, inflammatory markers). When imaging and exam indicate an abscess confined to the submandibular space that is not amenable to conservative management (antibiotics, hydration, sialagogues, ductal massage) or when immediate source control is required, the surgeon performs an external incision and drainage of the submaxillary salivary gland under local anesthesia with or without sedation, or under general anesthesia for complex or recurrent disease. The workflow includes informed consent, preoperative antibiotics as indicated, aseptic preparation, incision and drainage via an external approach to the submandibular gland, possible placement of a drain, hemostasis, wound dressing, and postoperative instructions with follow-up for drain removal and wound care. Documentation should note the indication, procedure performed as an external approach to drain pus from the submaxillary salivary gland, anesthesia type, estimated blood loss, specimen handling if cultures obtained, drains placed, and postoperative condition.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    40430Excision of submandibular gland (partial or total)Definitive gland excision performed when recurrent infection, chronic sialadenitis, or neoplasm is present; may follow or replace 42320 if drainage is insufficient.
    41800Incision and drainage of abscess, intraoral, soft tissue of floor of mouthAlternative intraoral drainage approach for accessible ductal or floor-of-mouth collections instead of external 42320.
    20526Injection, therapeutic, botulinum toxin, salivary gland (parotid or submandibular), per glandAdjunctive treatment for chronic sialorrhea or refractory sialadenitis in select cases; not for acute abscess but relevant in salivary disorders.
    76942Ultrasonic guidance for needle placement (e.g., aspiration, biopsy, injection), imaging supervision and interpretationUsed when ultrasound guidance is employed for aspiration or localization prior to or during drainage.
    10160Puncture aspiration of abscess, simple or singleMay be used for percutaneous aspiration of a salivary gland abscess when less invasive drainage is performed instead of open external drainage.

    Related Modifiers

    12 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…
    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…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…

    Showing 1–10 of 12

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207R00000X
    208800000X
    363L00000X
    367500000X
    156FC0800X
    335U00000X
    261QA0600X
    246W00000X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    A49.9Bacterial infection, unspecified
    B95.3Streptococcus pneumoniae as the cause of diseases classified elsewhere
    D73.9Disease of spleen, unspecified
    E11.9Type 2 diabetes mellitus without complications
    E86.9Volume depletion, unspecified
    G47.9Sleep disorder, unspecified
    I10Essential (primary) hypertension
    I50.9Heart failure, unspecified
    J34.2Deviated nasal septum
    J39.8Other specified diseases of upper respiratory tract

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Orthopedics/Musculoskeletal1 / 3

    10 rows

    PolicyPayerEffective Date
    Orthopedic Joint Procedures of the Knee for Managed Medicaid (MMC), Health and Recovery Plan (HARP), Child Health Plus (CHP), and Essential Plan (EP) Membersuniverahealthcare2027-01-01
    Autologous Chondrocyte Transplantation or Implantation Corporate Medical Policybcbsvermont2026-12-01
    Autologous Platelet-Derived Growth Factors (Platelet-Rich Plasma [PRP])Cigna2026-10-15
    Metatarsophalangeal Joint ReplacementCigna2026-10-15
    Shoulder Arthroplasty (Total, Partial, Reverse, Revision and Resurfacing)univerahealthcare2026-10-15
    Hip Arthroplasty (partial and total hip replacement)univerahealthcare2026-10-15
    Artificial Lumbar Intervertebral Disc (Lumbar Total Disc Arthroplasty)univerahealthcare2026-10-15
    Osteochondral Grafting of the Kneeuniverahealthcare2026-10-15
    Lumbar Fusion (arthrodesis) with decompressionuniverahealthcare2026-10-15
    Metal-on-Metal Total Hip Resurfacinguniverahealthcare2026-10-15

    Related Codes

    CPT-42300-PAROTID-ABSCESS-DRAINAGE

    CPT 42300: Drainage of Parotid Salivary Gland Abscess

    CPT-42305-PAROTID-ABSCESS-DRAINAGE-COMPLEX

    CPT 42305: Complex Drainage of Parotid Gland Abscess

    CPT-42310-INCISION-DRAINAGE-SUBMANDIBULAR-SUBLINGUAL-ABSCESS

    CPT 42310: Incision and Drainage of Submaxillary or Sublingual Salivary Gland Abscess

    CPT-42330-SIALOLITHOTOMY-REMOVAL-SALIVARY-GLAND-STONE

    CPT 42330: Sialolithotomy, Removal of Salivary Gland Stone

    CPT-42335-SIALOLITHOTOMY-SALIVARY-GLAND-STONE-REMOVAL

    CPT 42335: Sialolithotomy, Removal of Salivary Stone

    CPT-42340-SIALOLITHOTOMY-PAROTID-GLAND-REMOVAL

    CPT 42340: Sialolithotomy, Parotid Gland

    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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