CPT 90997: Charcoal or Resin Hemoperfusion for Toxin Removal
CPT code 90997 designates extracorporeal hemoperfusion using charcoal or resin cartridges to remove toxins, drugs, or other substances from the blood. Clinically, it serves as an artificial detoxification process akin to an artificial kidney and is used for urgent, potentially life‑threatening poisonings as well as for select patients with renal failure. Nationally, the code matters because it represents a high-acuity, resource‑intensive intervention that intersects emergency medicine, nephrology, and toxicology.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise account of the clinical context for use of 90997, typical sites of service, common billing modifiers associated with high‑acuity procedures, and where available, benchmarks and coding considerations relevant to payer coverage and claim adjudication. The publication also outlines policy and billing nuances that affect reimbursement pathways and documentation expectations at a national level.
This summary equips clinicians, coding professionals, and policy analysts with a focused overview of CPT code 90997, clarifying its clinical role, payer landscape, and the types of information that affect payment and utilization review.
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Billing Code Overview
CPT code 90997 describes an extracorporeal blood treatment that removes substances from the blood using a charcoal or resin cartridge functioning like an artificial kidney. This process is used to eliminate toxins or drugs from the bloodstream and can be employed for life‑threatening drug overdoses in patients with or without renal failure.
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Service type: Extracorporeal blood detoxification using charcoal or resin hemoperfusion
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Typical site of service: Hospital inpatient or hospital outpatient settings where critical toxin removal is required; may also occur in emergency department or intensive care units depending on clinical need
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting to the emergency department or inpatient unit with a life‑threatening drug overdose (for example, severe theophylline, carbamazepine, or lithium toxicity) or with refractory toxin accumulation despite supportive care. Initial evaluation includes airway, breathing, circulation stabilization, toxicology screening, serum drug levels, electrolyte assessment, and renal function tests. When consultation determines that extracorporeal charcoal or resin hemoperfusion is indicated to remove the offending substance from the blood, vascular access (typically a central venous catheter) is placed, the hemoperfusion cartridge is primed and anticoagulation is managed per protocol, and the patient is monitored continuously for hemodynamic and bleeding complications. Hemoperfusion may be performed in the emergency department, intensive care unit, or specialized dialysis/pheresis unit. The procedure may be ordered as a single urgent treatment or as serial treatments depending on clinical response and measured drug levels. Documentation should include indication, substance/toxin involved, timing of ingestion or exposure, informed consent when feasible, vascular access type, anticoagulation used, duration of cartridge use, vital sign monitoring, and patient response including post‑procedure drug levels when obtained.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default — no modifier | Use when no additional modifier applies |
11 | Patient unchanged — standard service | Use when procedure is performed under usual circumstances without unusual services |
22 | Increased procedural services | Use when substantially greater effort or time is required (document justification) |
23 | Unusual anesthesia | Use when general anesthesia or deep sedation is required for this procedure when normally not used |
26 | Professional component | Use when reporting only the physician professional component separate from facility/equipment costs |
51 | Multiple procedures | Use when hemoperfusion is billed with additional surgical/procedural services during the same session |
52 | Reduced services | Use when the procedure is partially reduced or not completed as planned |
53 | Discontinued procedure | Use when the procedure is started but discontinued for patient safety reasons |
78 | Return to OR for related procedure following initial service | Use if a subsequent related procedural intervention is required in the immediate postoperative period |
80 | Assistant surgeon | Use when a second surgeon/qualified practitioner assists and payer requires modifier for assistant services |
81 | Minimum assistant surgeon | Use when a minimal assistant surgeon role is documented |
82 | Assistant surgeon when qualified resident not available | Use when an assistant surgeon is used instead of a resident |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for covered ASC procedures | Use when those mid‑level practitioners perform or assist in the procedure in applicable settings |
QX | Service performed by a certified nurse anesthetist (CRNA) with physician present | Use when CRNA provides anesthesia care with physician direction |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 208000000X | Nephrology | Common involvement for extracorporeal blood purification techniques and management of dialysis access and anticoagulation |
| 208600000X | Critical Care Medicine | Frequently directs urgent hemoperfusion in ICU settings for severe poisoning and hemodynamic monitoring |
| 207RN0400X | Emergency Medicine | Often identifies and initiates hemoperfusion in the emergency department for acute overdoses |
| 220N00000X | Medical Toxicology | Specialists in toxicology guide indication, timing, and interpretation of hemoperfusion for specific toxins |
| 163W00000X | Hospitalist Medicine | Manages inpatient coordination, ongoing monitoring, and post‑procedure care |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
T43.601A | Poisoning by tricyclic antidepressants, accidental (unintentional), initial encounter | Hemoperfusion may be used for severe TCA overdose when toxin removal is indicated |
T56.011A | Toxic effect of lead, accidental (unintentional), initial encounter | Certain severe metal toxicities may be managed with extracorporeal removal techniques |
T42.4X1A | Poisoning by benzodiazepines, accidental (unintentional), initial encounter | Hemoperfusion can be considered for some severe or mixed overdoses not responsive to supportive care |
T43.321A | Poisoning by lithium, intentional self-harm, initial encounter | Lithium is a classic indication for extracorporeal removal when levels are toxic and symptomatic |
T36.0X1A | Poisoning by penicillins, accidental (unintentional), initial encounter | Severe drug toxicities with significant systemic effects may prompt extracorporeal removal |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
36556 | Placement of non-tunneled centrally inserted central venous catheter, age 5 years or older, for dialysis or pheresis | Vascular access placement commonly performed prior to hemoperfusion when central access is required |
36000 | Introduction of needle or intracatheter, vein; simple venipuncture | Peripheral venous access for medications, contrast, or temporary access in select cases prior to central placement |
96360 | Intravenous infusion, hydration; initial, 31 minutes to 1 hour | IV fluid management often provided concurrently for hemodynamic support during procedure |
92950 | Cardiopulmonary resuscitation (external cardiac massage) | Included as a potential emergent service if cardiac arrest occurs during the treatment session |
99291 | Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes | Critical care E/M is commonly reported for intensive level management of patients undergoing hemoperfusion |