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    OpenPayerBilling CodesPediatric Critical Care Patient TransportCPT cpt-99466-transport-accompaniment-critically-ill-infant
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    CPT 99466: Critical Care During Interfacility Transport for Child ≤2 Years

    Medicare pays $206 on average nationally for this procedure.

    CPT code 99466 describes in-person critical care during interfacility transport for a child two years of age or younger; this service is a form of critical care transport accompaniment where the provider accompanies and cares for a critically ill or injured infant/toddler while the patient is transported between facilities, with the service type being critical care during transport and the typical site of service being interfacility transport/ambulance or specialized transport vehicle.

    For related coverage guidance, see recent payer policy updates: Ambulance and Medical Transport Services (Ground, Air and Water) Corporate Medical Policy, Emergency Air/Water Ambulance Services Medical Guideline, Non-Emergent Ambulance Services.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient scenario involves a critically ill or injured infant (age two years or younger) requiring interfacility transfer for a higher level of pediatric critical care. Example: a 6-month-old with severe bronchiolitis and respiratory failure on high-flow nasal cannula and escalating oxygen needs at a community hospital; the receiving tertiary pediatric intensive care unit accepts the transfer and an attending pediatric intensive care physician or pediatric critical care transport team physician accompanies the child during ground or rotary-wing transport to manage ventilatory support, vasoactive infusions, and potential rapid deterioration. The clinical workflow begins with stabilization at the sending facility, communication between sending and receiving teams, arrangement of transport (ambulance or helicopter), acceptance by the receiving facility, documentation of the physician’s in-person accompaniment during transport, continuous monitoring and interventions en route, and handoff on arrival. Billing for 99466 is appropriate when the provider physically accompanies the child in the transporting vehicle and provides medical management throughout the interfacility transfer.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99465Physician services, critical care transport, patient older than 2 years of age, per 30 minutesUsed for critically ill or injured pediatric patients older than two years; parallels 99466 by age grouping and transport context.
    99467Physician services, critical care transport, each additional 30 minutes (list separately in addition to code for primary service)Billed when transport time exceeds the unit increment for the primary transport accompaniment service; used to report additional time beyond the base service.
    99291Critical care, evaluation and management of the critically ill or injured patient; first 30-74 minutesUsed at the sending or receiving facility for bedside critical care E/M services separate from the transport accompaniment when provided.
    99292Critical care, each additional 30 minutesAdd-on for prolonged critical care time provided at a facility in addition to 99291.
    99477Initial inpatient neonatal critical care, per day, for infants less than 28 daysRelated when neonatal critical care spans transport and inpatient services; documents inpatient daily care separate from transport accompaniment.

    Related Modifiers

    9 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…
    24Modifier 24 denotes an unrelated evaluation and management (E/M) service performed by the same physician or qualified healthcare professional during a postoperative global period. Per CPT guidance,…- Use modifier 24 when you report an evaluation and management (E/M) service performed by the same physician or same-specialty group during a procedure’s postoperative global period that is unrelated…
    25CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
    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…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2080P0206X
    2080P0201X
    2084P0800X
    363L00000X
    225XE0001X
    231H00000X
    363LP1700X
    111NT0100X

    Related Payer Policy Updates

    Specialty: Emergency & Medical Transportation1 / 2

    10 rows

    PolicyPayerEffective Date
    Ambulance and Medical Transport Services (Ground, Air and Water) Corporate Medical Policybcbsvermont2026-10-01
    Emergency Air/Water Ambulance Services Medical GuidelineWPS Health Insurance2026-10-01
    Non-Emergent Ambulance ServicesConnectiCare2026-09-11
    Fixed Wing Air Ambulance TransportCigna2026-08-15
    Air AmbulanceAmbetter Georgia2026-08-01
    Ambulance Services (for New Mexico Only)UnitedHealthcare2026-08-01
    Ambulance Services (for Tennessee Only)UnitedHealthcare2026-08-01
    Clinical Policy: Air AmbulanceAmbetter Nevada2026-08-01
    Air AmbulanceCentene2026-08-01
    Clinical Policy: Air AmbulanceArizona Complete Health2026-08-01

    Related Codes

    CPT-99467-CRITICALLY-ILL-INFANT-INTERFACILITY-TRANSPORT

    CPT 99467: Accompaniment and Care of Critically Ill/ Injured Infant During Transport

    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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