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    v1.0.28
    OpenPayerBilling CodesProprietary Laboratory AnalysesCPT cpt-0200u-navigator-xk-sequencing-kx-blood-group-antigen-testing
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    CPT 0200U: Navigator XK Sequencing for Kx Blood Group Genotyping

    CPT code 0200U is a Proprietary Laboratory Analyses (PLA) code for the Navigator XK Sequencing test from Grifols Immunohematology Center that sequences specific gene regions to determine Kx blood group antigens, used to help clinicians minimize adverse blood‑type incompatibility reactions in transfusion, organ transplant, pregnancy, and newborn care; service type: molecular diagnostic sequencing performed on a blood specimen, typical site of service: clinical laboratory or specialized immunohematology reference laboratory.

    For related coverage guidance, see recent payer policy updates: RTM Testing of Homocysteine Metabolism-Related Conditions, Multimarker Serum Testing Related to Ovarian Cancer, B-Hemolytic Streptococcus Testing.

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    Clinical & Coding Specifications

    Clinical Context

    A 28-year-old pregnant woman with a history of multiple prior transfusions presents for prenatal care. Her obstetrician orders molecular blood group testing to evaluate Kx antigen status to inform transfusion planning and fetal/newborn hemolytic disease risk. A blood specimen is collected in clinic or at an outpatient phlebotomy center and sent to Grifols Immunohematology Center for the Navigator XK Sequencing test. The laboratory performs targeted sequencing of the XK gene sequences listed under 0200U to determine Kx blood group antigen expression. Results are returned to the ordering clinician and the transfusion service, who use the genotype to minimize risk of adverse transfusion reactions, guide selection of compatible donor blood, and assist in counseling for pregnancy and newborn management. Typical workflow steps: order placed by obstetrician, sample collection (blood), specimen shipped to reference immunohematology lab, sequencing and analysis performed, genotyping report issued, transfusion service and clinical team review for transfusion/transplant/neonatal planning.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    80048Basic metabolic panelPre-transfusion baseline chemistry testing often ordered alongside blood bank assessments
    36415Collection of venous blood by venipunctureSpecimen collection code used when obtaining the blood sample sent to Grifols for 0200U
    86850Blood typing; ABOSerologic ABO blood group testing typically performed as part of immunohematology workup alongside molecular testing
    86890Antibody identification; serumAntibody identification testing to detect clinically significant alloantibodies that complement genotype information
    81479Unlisted molecular pathology procedureUsed when additional, non-standard molecular analyses are required beyond the proprietary PLA 0200U

    Related Modifiers

    8 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…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207Q00000XFamily Medicine PhysicianFamily Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadt…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    207LP3000XPediatric Anesthesiology PhysicianAn anesthesiologist who has had additional skill and experience in and is primarily concerned with the anesthesia, sedation, and pain management needs…
    208100000XPhysical Medicine & Rehabilitation PhysicianPhysical medicine and rehabilitation, also referred to as rehabilitation medicine, is the medical specialty concerned with diagnosing, evaluating, and…
    103TC1900XCounseling PsychologistA psychologist who specializes in general practice and health service. It focuses on how people function both personally and in their relationships at…
    101YP2500XProfessional CounselorBehavioral Health & Social Service Providers · Counselor
    207WX0108XUveitis and Ocular Inflammatory Disease (Ophthalmology) PhysicianAn ophthalmologist who specializes in the treatment of intraocular inflammation, scleritis, keratitis and infectious disorders affecting the eye and i…

    Related Payer Policy Updates

    Specialty: Genetic & Molecular Testing1 / 3

    2 rows

    PolicyPayerEffective Date
    RTM Testing of Homocysteine Metabolism-Related ConditionsOscar Health2026-10-01
    Multimarker Serum Testing Related to Ovarian CancerBlue Cross Blue Shield - Rhode Island2026-09-01

    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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