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    v1.0.30
    OpenPayerBilling CodesArterial ProceduresCPT cpt-36625-arterial-catheterization-for-monitoring-and-sampling
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    CPT 36625: Arterial Catheter Insertion

    Medicare pays $97 on average nationally for this procedure.

    CPT code 36625 describes percutaneous insertion of an arterial catheter after a skin incision to access an artery for blood sampling, transfusion, or continuous real-time arterial pressure and heart rate monitoring; service type: arterial catheter insertion/arterial line placement; typical site of service: hospital inpatient or outpatient procedural area, intensive care unit, or operating room where sterile vascular access procedures are performed.

    For related coverage guidance, see recent payer policy updates: Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure, Cardiology - Ivabradine, Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA).

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is a hospitalized adult requiring invasive arterial access for continuous real-time hemodynamic monitoring or repeated arterial blood sampling. For example, a 68-year-old patient admitted to the intensive care unit with septic shock and hypotension requires continuous arterial blood pressure monitoring and frequent arterial blood gas sampling to guide titration of vasopressors and ventilator settings. The provider performs 36625 by identifying a peripheral artery (commonly radial or femoral) under sterile conditions, making a small skin incision, and inserting an arterial catheter for sampling, transfusion, or continuous hemodynamic monitoring. The procedure is commonly performed in the ICU, operating room, or interventional radiology suite. Pre-procedure workflow includes verification of indications, informed consent when feasible, review of anticoagulation status, and site-selection based on collateral circulation (e.g., Allen test for radial access). Post-procedure workflow includes securement of the catheter, pressure transducer setup for continuous monitoring, documentation of arterial waveform confirmation, site care instructions, and monitoring for complications such as bleeding, thrombosis, or infection.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    36000Introduction of needle or intracatheter, veinPeripheral venous access that may be performed before or after arterial catheter placement for infusion or medication administration.
    36556Insertion of non-tunneled centrally inserted central venous catheter; age 5 years or olderCentral venous access often performed in conjunction with arterial catheterization for comprehensive hemodynamic monitoring and medication administration.
    36904Introduction of needle and/or catheter into extracranial, peripheral or visceral artery, initial diagnostic or therapeutic; each vessel catheterizedEndovascular diagnostic or therapeutic arterial catheterization that may be preceded by a peripheral arterial line for monitoring.
    99291Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutesCritical care time frequently reported when arterial catheter placement occurs as part of management of a critically ill patient.
    99213Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutesOutpatient encounters may involve arterial catheter placement in select settings or follow-up care related to arterial line complications or removal.
    36510Insertion of non-tunneled centrally inserted central venous catheter; younger than 5 yearsPediatric central venous access when arterial monitoring and venous access are both required for pediatric patients.

    Related Modifiers

    9 rows

    ModifierDescriptionWhen to Use
    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…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of 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…
    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…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208D00000X
    207RP1001X
    207L00000X
    208000000X
    207K00000X
    174MM1900X
    2083P0901X
    1223X0008X

    Related ICD-10-CM Codes

    30 rows

    ICD-10-CM CodeDescription
    A41.51Sepsis due to Escherichia coli [E. coli]
    A41.9Sepsis, unspecified organism
    D50.9Iron deficiency anemia, unspecified
    D65Disseminated intravascular coagulation [defibrination syndrome]
    E11.65Type 2 diabetes mellitus with hyperglycemia
    E86.0Dehydration
    E87.1Hypo-osmolality and hyponatremia
    G62.9Polyneuropathy, unspecified
    G90.9Disorder of the autonomic nervous system, unspecified
    I10Essential (primary) hypertension

    Showing 1–10 of 30

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood PressureBluecross Idaho2026-11-01
    Cardiology - IvabradineCigna2026-10-15
    Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA)univerahealthcare2026-10-15
    Percutaneous Ventricular Assist DeviceUnitedHealthcare2026-10-01
    Cardiovascular Disease Risk AssessmentOscar Health2026-10-01
    Biomarkers for Myocardial Infarction and Chronic Heart FailureOscar Health2026-10-01
    Multiple Procedure Payment Reduction for Diagnostic Cardiovascular ProceduresBlue Cross Blue Shield - Maine2026-10-01
    Left Atrial Appendage Closure Devicesexcellus_health_plan_inc2026-09-17
    Left Atrial Appendage Closure Devicesuniverahealthcare2026-09-17
    Cardiac Omnibus CodesCigna2026-09-15

    Related Codes

    CPT-36600-ARTERIAL-BLOOD-SAMPLING-FOR-DIAGNOSTIC-TESTING

    CPT 36600: Arterial Blood Gas Sampling

    CPT-36620-ARTERIAL-CATHETER-INSERTION-FOR-MONITORING-AND-SAMPLING

    CPT 36620: Percutaneous Arterial Catheterization for Monitoring or Sampling

    CPT-36640-ARTERIAL-CATHETER-PLACEMENT-PROLONGED-INFUSION

    CPT 36640: Arterial Catheter Insertion for Prolonged Infusion

    CPT-36660-UMBILICAL-ARTERY-CATHETER-INSERTION-NEWBORN

    CPT 36660: Umbilical Artery Catheterization in Newborn

    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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