Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.31
    OpenPayerBilling CodesProprietary Laboratory AnalysesCPT cpt-0389u-kawasaki-rna-expression-risk-score
    Ask Trek AI about this page

    CPT 0389U: Kawasaki Disease RNA Expression Risk Score

    CPT code 0389U is a Proprietary Laboratory Analyses (PLA) test reported only for KawasakiDx, OncoOmicsDx Laboratory from mProbe that evaluates RNA expression of two genes in a patient blood specimen to generate a risk score for Kawasaki disease (KD); the service is a molecular diagnostic laboratory test typically performed in a clinical laboratory setting on a blood sample from pediatric patients with fever of unknown origin.

    For related coverage guidance, see recent payer policy updates: Minimal Residual Disease (MRD) Testing for Cancer, Biomarker Testing Mandate, Prenatal (Fetal) Diagnostic Testing.

    Customize your policy alerts

    Sign up for cpt 0389U policy alerts

    Get alerted when payer policies referencing 0389U are released or updated.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    Table of contents

    Progress1 / 6

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • Facility ComparisonBeds, revenue & payer mix
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    Clinical & Coding Specifications

    Clinical Context

    A pediatric patient aged 6 months to 5 years presents to an urgent care clinic or pediatric emergency department with persistent fever for more than 5 days, conjunctival injection, mucocutaneous changes, and possible lymphadenopathy. The clinician suspects Kawasaki disease (KD) as part of the differential for fever of unknown origin in a child. A peripheral blood specimen is ordered and sent to the laboratory performing the proprietary KawasakiDx, OncoOmicsDx assay from mProbe. The laboratory performs RNA expression analysis of the two genes specified by the proprietary test and returns a KD risk score. Results are reviewed by the ordering pediatrician or pediatric infectious disease specialist to inform risk stratification and further management, such as echocardiography referral, intravenous immunoglobulin consideration, or close outpatient follow-up.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    0389UKawasakiDx, OncoOmicsDx Laboratory (mProbe) — RNA expression analysis of two genes with reported KD risk scoreThis is the proprietary PLA test that analyzes RNA expression to generate a Kawasaki disease risk score
    36415Collection of venous blood by venipunctureCommonly performed immediately before sending the specimen to the reference laboratory for the KawasakiDx assay
    86328Antibody; serology for infectious agents (multiple types)May be ordered in parallel to evaluate other causes of persistent fever in children (e.g., viral serologies)
    93975Echocardiography, transthoracic, real-time with image documentation — limited studyOften performed after a positive or concerning KD risk score to assess coronary artery involvement
    80053Comprehensive metabolic panel (CMP)Frequently ordered alongside the KD-specific test to evaluate systemic inflammation and organ function
    85025Complete blood count (CBC) with automated differentialCommon lab test ordered concurrently to evaluate for leukocytosis, anemia, or thrombocytosis associated with KD

    Related Modifiers

    7 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    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
    208000000X
    207L00000X
    207Q00000X
    261QU0200X
    246YC3301X
    175M00000X
    283Q00000X
    163WL0100X

    Related Payer Policy Updates

    Specialty: Genetic & Molecular Testing1 / 3

    10 rows

    PolicyPayerEffective Date
    Minimal Residual Disease (MRD) Testing for Cancerregence2027-01-01
    Biomarker Testing MandateBlue Cross Blue Shield - Rhode Island2027-01-01
    Prenatal (Fetal) Diagnostic TestingBlue Cross Blue Shield - Rhode Island2027-01-01
    Oral Cancer Screening and TestingOscar Health2027-01-01
    RTM Testing for Alpha-1 Antitrypsin DeficiencyOscar Health2027-01-01
    Cytochrome P450 Genotype-Guided Treatment Strategy Corporate Medical Policybcbsvermont2027-01-01
    Polygenic Risk ScoreBlue Cross Blue Shield - Rhode Island2026-12-01
    Gene Expression Profiling for Cutaneous MelanomaBlue Cross Blue Shield - Rhode Island2026-12-01
    Genetic Testing for Macular Degenerationregence2026-11-01
    Pharmacogenetic Panel Testing (for Ohio Only)Colorado Rocky Mountain Health Plans2026-11-01

    Related Codes

    CPT-0001U-PRECISETYPE-HEA-MULTIPLEX-RBC-ANTIGEN-GENOTYPING

    CPT 0001U: PreciseType HEA Erythrocyte Antigen Genotyping

    CPT-0002U-POLYPDX-URINE-METABOLOMIC-ASSAY-ADENOMATOUS-POLYP-RISK

    CPT 0002U: PolypDX™ Urine Metabolomic Risk Assay

    CPT-0003U-OVAR-A-NEXT-GENERATION-OVARIAN-CANCER-RISK-ASSAY

    CPT 0003U: Overa (MIA2G) Ovarian Cancer Risk Assay

    CPT-0005U-PROSTATE-EXOSOMEDX-INTELLISCORE-GENE-EXPRESSION-URINE-TEST

    CPT 0005U: ExosomeDx Prostate (IntelliScore) urine gene expression test

    CPT-0007U-TOXPROTECT-URINE-DRUG-SCREEN-WITH-DNA-AUTHENTICATION

    CPT 0007U: ToxProtect Urine Drug Screen With DNA Authentication

    CPT-0008U-H-PYLORI-ANTIBIOTIC-RESISTANCE-SEQUENCING-PANEL

    CPT 0008U: H. pylori Antibiotic Resistance Gene Panel

    CPT-0009U-DEPARRAY-HER2-FISH-TUMOR-CELL-ISOLATION

    CPT 0009U: DEPArray HER2 Tumor‑Cell Isolation with FISH Analysis

    CPT-0010U-BACTERIAL-TYPING-WHOLE-GENOME-SEQUENCING-MAYO-CLINIC

    CPT 0010U: Bacterial Typing by Whole Genome Sequencing, Mayo Clinic

    CPT-0011U-CORDANT-CORE-ALGORITHMIC-ORAL-FLUID-DRUG-TEST

    CPT 0011U: Oral Fluid Drug Test with Algorithmic Steady‑State Comparison

    CPT-0016U-BCR-ABL1-MAJOR-MINOR-FUSION-TRANSCRIPT-TESTING

    CPT 0016U: BCR–ABL1 Major and Minor Breakpoint Fusion Transcripts

    Showing 1–10 of 536

    • More pages

    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.
    Published by

    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.