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    v1.0.30
    OpenPayerBilling CodesProprietary Laboratory AnalysesCPT cpt-0336u-irisight-prenatal-whole-genome-analysis
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    CPT 0336U: IriSight Prenatal Whole Genome Sequence Analysis

    CPT code 0336U is a Proprietary Laboratory Analyses (PLA) code that reports the IriSight™ Prenatal Analysis – Comparator from Variantyx Inc., a whole genome sequencing test performed on blood or saliva to identify genetic variants related to fetal or pregnancy clinical signs or rare heritable disorders that a parent may pass to the fetus; service type: clinical diagnostic laboratory whole genome sequence analysis; typical site of service: outpatient laboratory or specialized genetic testing laboratory.

    For related coverage guidance, see recent payer policy updates: Prenatal (Fetal) Diagnostic Testing, Oral Cancer Screening and Testing, RTM Testing for Alpha-1 Antitrypsin Deficiency.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A pregnant patient presents to a maternal-fetal medicine clinic after abnormal prenatal screening or a family history suggestive of a heritable disorder. The clinician documents concern for fetal anomalies, recurrent pregnancy loss, or a known parental carrier status for a rare genetic condition. After genetic counseling, the patient consents to genomic testing and provides a blood or saliva sample for the IriSight™ Prenatal Analysis – Comparator (0336U). The sample is sent to Variantyx Inc. for whole genome sequence analysis focused on identifying fetal-related variants or parental variants that could be transmitted to the fetus. Results return to the ordering maternal-fetal medicine specialist or genetics provider and are reviewed in a follow-up visit with the patient to discuss diagnostic findings, recurrence risk, and potential implications for pregnancy management and neonatal planning.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    0000UData not available in the input.Data not available in the input.
    0001UData not available in the input.Data not available in the input.
    0002UData not available in the input.Data not available in the input.

    Related Modifiers

    7 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…
    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…
    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
    207Q00000X
    207K00000X
    207L00000X
    207P00000X
    167G00000X
    207RH0002X
    156FX1100X
    2080P0204X

    Related ICD-10-CM Codes

    25 rows

    ICD-10-CM CodeDescription
    D82.1Di George's syndrome
    F53.0Postpartum depression
    N97.9Female infertility, unspecified
    O09.10Supervision of pregnancy with history of ectopic pregnancy, unspecified trimester
    O09.12Supervision of pregnancy with history of ectopic pregnancy, second trimester
    O09.13Supervision of pregnancy with history of ectopic pregnancy, third trimester
    O26.842Uterine size-date discrepancy, second trimester
    O36.0110Maternal care for anti-D [Rh] antibodies, first trimester, not applicable or unspecified
    O36.0120Maternal care for anti-D [Rh] antibodies, second trimester, not applicable or unspecified
    O36.0130Maternal care for anti-D [Rh] antibodies, third trimester, not applicable or unspecified

    Showing 1–10 of 25

    Related Payer Policy Updates

    Specialty: Genetic & Molecular Testing1 / 3

    10 rows

    PolicyPayerEffective Date
    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 Diagnosis and Management of Mental Health ConditionsBlue Cross Blue Shield - Rhode Island2026-11-01
    Molecular Testing in the Management of Pulmonary NodulesBlue Cross Blue Shield - Rhode Island2026-11-01
    Genetic Testing for Hereditary Cancer (for North Carolina Only)Colorado Rocky Mountain Health Plans2026-10-01
    Expanded Molecular Testing of Cancers to Select Targeted TherapiesBlue Cross Blue Shield - North Dakota2026-10-01

    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

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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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