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    v1.0.31
    OpenPayerBilling CodesMedical And Surgical SuppliesHCPCS hcpcs-a4218-sterile-saline-metered-dose-10ml
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    HCPCS Level II A4218: Sterile Saline Metered Dose Dispenser, 10 ml

    HCPCS Level II code A4218 describes a sterile saline or water metered dose dispenser, 10 ml, used to deliver measured volumes of sterile saline or sterile water for clinical applications such as wound irrigation or topical rinsing; service type: supply/device dispensed in conjunction with clinical care; typical site of service: outpatient clinics, ambulatory care settings, emergency departments, or home health when a provider supplies the dispenser for patient use.

    For related coverage guidance, see recent payer policy updates: Diabetic Supplies, Radiofrequency Ablation for Thyroid Nodules, Continuous Glucose Monitoring and Insulin Delivery for Managing Diabetes (for Idaho Only).

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult or pediatric outpatient who requires a small-volume sterile saline or sterile water metered dose dispenser for wound irrigation, nasal irrigation, ophthalmic rinsing, or delivery of topical medications in a clinic, emergency department, ambulatory surgery center, or home health setting. The clinician (nurse, physician assistant, physician, respiratory therapist, or home health nurse) selects A4218 — sterile saline or water, metered dose dispenser, 10 ml — when a single-use, pre-measured 10 mL dispenser is provided to cleanse wounds, irrigate surgical sites, rinse mucous membranes (for example nasal or ocular), or dilute/flush small catheters. Typical workflow: assessment and indication documented in the medical record; selection and dispensing of the 10 mL metered saline/water; patient or caregiver instruction on use (when applicable); administration at point of care or supply for take-home use; documentation of lot number/expiration and quantity supplied. Typical sites of service include outpatient clinics, emergency departments, ambulatory surgery centers, and home health visits.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    12001Simple repair of superficial wounds; 2.5 cm or lessWound irrigation with A4218 commonly precedes simple wound repair
    97602Debridement (e.g., high pressure lavage) not under anesthesia; without multiple debridementsSterile 10 mL dispensers may be used for small-volume irrigation during wound care visits
    69210Removal of foreign body, external ear; with instrumentationSmall sterile irrigant dispensers can be used to irrigate ear canals during foreign body removal
    31231Nasal/sinus endoscopy, diagnostic, unilateralSterile saline in 10 mL dispensers may be used for mucosal irrigation during nasal endoscopy
    65210Removal of impacted cerumen; simpleSmall sterile saline dispensers may assist in cerumen softening/irrigation prior to removal

    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…
    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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    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…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    163W00000X
    207P00000X
    225100000X
    261QM1300X
    163WC0200X
    207YX0901X
    343900000X
    172P00000X

    Related ICD-10-CM Codes

    29 rows

    ICD-10-CM CodeDescription
    E78.5Hyperlipidemia, unspecified
    F17.210Nicotine dependence, cigarettes, uncomplicated
    G47.33Obstructive sleep apnea (adult) (pediatric)
    H66.90Otitis media, unspecified, unspecified ear
    H66.91Otitis media, unspecified, right ear
    I10Essential (primary) hypertension
    I95.1Orthostatic hypotension
    J00Acute nasopharyngitis [common cold]
    J02.9Acute pharyngitis, unspecified
    J03.90Acute tonsillitis, unspecified

    Showing 1–10 of 29

    Related Payer Policy Updates

    Specialty: Endocrinology1 / 3

    10 rows

    PolicyPayerEffective Date
    Diabetic SuppliesCigna2026-10-15
    Radiofrequency Ablation for Thyroid NodulesCigna2026-10-15
    Continuous Glucose Monitoring and Insulin Delivery for Managing Diabetes (for Idaho Only)UnitedHealthcare2026-10-01
    Continuous Glucose Monitoring and Insulin Delivery for Managing Diabetes (for Indiana Only)UnitedHealthcare2026-10-01
    Tzield (teplizumab-mzwv) CoverageUnitedHealthcare2026-10-01
    Medical Necessity Guidelines Insulin PumpsMass General Brigham Health Plan2026-10-01
    Medical Necessity Guidelines: Continuous Glucose MonitorsMass General Brigham Health Plan2026-10-01
    Continuous Glucose MonitoringAmbetter Nevada2026-10-01
    Salivary Hormone TestingOscar Health2026-10-01
    Bone Turnover Markers TestingOscar Health2026-10-01

    Related Codes

    HCPCS-A4206-STERILE-SYRINGE-1CC-NEEDLE

    HCPCS A4206: Syringe with Needle, 1 cc or Less, Sterile

    HCPCS-A4207-STERILE-2CC-SYRINGE-WITH-NEEDLE

    HCPCS Level II A4207: Syringe with Needle, Sterile 2 cc

    HCPCS-A4208-STERILE-3CC-SYRINGE-WITH-NEEDLE

    HCPCS Level II A4208: Syringe with Needle, Sterile 3 cc

    HCPCS-A4209-STERILE-SYRINGE-WITH-NEEDLE-5CC-OR-GREATER

    HCPCS Level II A4209: Syringe with Needle, Sterile 5 cc or Greater

    HCPCS-A4210-NEEDLE-FREE-INJECTION-DEVICE

    HCPCS Level II A4210: Needle-free Injection Device, Each

    HCPCS-A4211-SUPPLIES-SELF-ADMINISTERED-INJECTIONS

    HCPCS Level II A4211: Supplies for Self-Administered Injections

    HCPCS-A4212-NON-CORING-NEEDLE-STYLET-CATHETER-ACCESS-SUPPLY

    HCPCS Level II A4212: Non-coring Needle or Stylet with/without Catheter

    HCPCS-A4213-STERILE-SYRINGE-20CC-OR-GREATER

    HCPCS Level II A4213: Syringe, Sterile, 20 cc or Greater, Each

    HCPCS-A4215-STERILE-NEEDLE-SINGLE-EACH

    HCPCS Level II A4215: Needle, Sterile, Any Size

    HCPCS-A4216-STERILE-DILUENT-FLUSH-10ML

    HCPCS Level II A4216: Sterile Diluent/Flush, 10 ml

    Showing 1–10 of 633

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    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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