Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • 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.

    v1.0.30
    OpenPayerBilling CodesGenetic Analysis ProceduresCPT cpt-81112-hpa-15-genetic-analysis-s682y
    Ask Trek AI about this page

    CPT 81112: HPA-15 (S682Y) Platelet Antigen Genotyping

    CPT code 81112 describes a laboratory molecular genotyping test performed by a lab technician to analyze the two common alleles of Human Platelet Antigen 15 (HPA‑15), also called S682Y, on a specimen such as blood or amniotic fluid; the service type is diagnostic molecular pathology / genotyping, and the typical site of service is a clinical laboratory or hospital lab where the technical testing and analysis are performed.

    For related coverage guidance, see recent payer policy updates: Oral Cancer Screening and Testing, RTM Testing for Alpha-1 Antitrypsin Deficiency, Cytochrome P450 Genotype-Guided Treatment Strategy Corporate Medical Policy.

    Customize your policy alerts

    Sign up for cpt 81112 policy alerts

    Get alerted when payer policies referencing 81112 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 / 7

    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 32-year-old pregnant patient with a prior fetal/neonatal alloimmune thrombocytopenia (FNAIT) in a prior pregnancy requires targeted platelet antigen genotyping. The clinician orders 81112 to determine maternal and fetal Human Platelet Antigen 15 (HPA‑15 / S682Y) allele status using maternal blood and, when indicated, amniotic fluid or chorionic villus specimen. The clinical workflow: specimen collection (peripheral blood or amniotic fluid) -> specimen accessioning and chain-of-custody -> DNA extraction -> targeted genotyping assay for HPA‑15 alleles -> technical analysis and result reporting. Results are used by maternal‑fetal medicine, transfusion medicine, or hematology teams to assess alloimmunization risk, guide antenatal monitoring, and inform transfusion planning for mother or neonate.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    81025Urinalysis, automated; without microscopyData not available in the input.
    36415Collection of venous blood by venipunctureOften performed immediately prior to 81112 to obtain the specimen for DNA-based HPA‑15 testing.
    89050DNA probe, amplified probe technique (examples) — placeholderData not available in the input.
    89240Amniotic fluid analysis — culture or other testingAmniotic fluid may be used as the specimen source for fetal genotyping when indicated.
    81479Unlisted molecular pathology procedureUsed when an assay or method does not map to a specific CPT molecular code; sometimes used for novel or proprietary HPA testing methods.

    Related Modifiers

    6 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…
    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…
    90Modifier ‑90 (Reference/Outside Laboratory) indicates that a laboratory test was performed by an entity other than the treating or reporting provider. The American Medical Association defines…- Use CPT modifier -90 when a laboratory test is performed by an outside/reference laboratory (an entity other than the treating or reporting physician or qualified professional) and the claim needs…
    91Modifier 91 — “Repeat Clinical Diagnostic Laboratory Test” — is appended when the exact same CPT laboratory test is performed more than once for the same patient on the same day because serial,…- Use modifier 91 when the exact same CPT laboratory test is performed more than once on the same patient on the same date because serial or repeated testing is medically necessary to monitor…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208000000X
    2080P0206X
    207Q00000X
    364SF0001X
    207RS0012X
    3336M0002X
    364SX0106X
    1710I1002X

    Related ICD-10-CM Codes

    22 rows

    ICD-10-CM CodeDescription
    D66Hereditary factor VIII deficiency
    D67Hereditary factor IX deficiency
    D68.4Acquired coagulation factor deficiency
    D69.0Allergic purpura
    D69.3Immune thrombocytopenic purpura
    D69.59Other secondary thrombocytopenia
    D69.6Thrombocytopenia, unspecified
    D69.9Hemorrhagic condition, unspecified
    D70.9Neutropenia, unspecified
    P55.0Rh isoimmunization of newborn

    Showing 1–10 of 22

    Related Payer Policy Updates

    Specialty: Genetic & Molecular Testing1 / 3

    10 rows

    PolicyPayerEffective Date
    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
    Carrier Testing Panels for Genetic Diseases (for Kentucky Only)UnitedHealthcare2026-10-01
    Genetic Testing for Neurological Disorders (for Kansas Only)UnitedHealthcare2026-10-01
    Genetic and Molecular TestingProvidence Health Plan2026-10-01
    Cell-Free Fetal DNA Testing (for Idaho Only)UnitedHealthcare2026-10-01
    Next Generation Sequencing for Minimal Residual Disease DetectionProvidence Health Plan2026-10-01
    Pharmacogenetic Panel Testing (for Kansas Only)UnitedHealthcare2026-10-01
    Non-Covered Genetic Panel TestsProvidence Health Plan2026-10-01

    Related Codes

    CPT-81105-HPA-1-PLATELET-ANTIGEN-1-GENOTYPING-ITGB3-CD61

    CPT 81105: HPA-1 (ITGB3/CD61) Genotyping, Technical Component

    CPT-81106-HPA-2-T145M-GENETIC-ALLELE-ANALYSIS

    CPT 81106: HPA-2 (T145M) Platelet Antigen Genotyping

    CPT-81107-HPA-3-GENETIC-ANALYSIS-TECHNICAL-COMPONENT

    CPT 81107: HPA‑3 (I843S) Platelet Antigen Genotyping

    CPT-81108-HPA-4-R143Q-GENOTYPING

    CPT 81108: HPA-4 (R143Q) Genotyping

    CPT-81109-HPA-5-K505E-GENETIC-ANALYSIS

    CPT 81109: HPA-5 (K505E) Genotyping Test

    CPT-81110-HPA-6-R489Q-GENOTYPING

    CPT 81110: HPA-6 (R489Q) Genotyping, Technical Component

    CPT-81111-HPA-9-V837M-ALLELE-ANALYSIS

    CPT 81111: HPA-9 (V837M) Genotyping, Technical Test

    CPT-81120-IDH1-MOLECULAR-DIAGNOSTIC-TEST

    CPT 81120: IDH1 Mutation Detection, Technical Component

    CPT-81121-IDH2-MOLECULAR-DIAGNOSTIC-TEST

    CPT 81121: IDH2 Mutation Detection, Technical Component

    CPT-81161-DMD-GENE-DELETION-DUPLICATION-ANALYSIS

    CPT 81161: Dystrophin (DMD) Gene Deletion/Duplication Analysis

    Showing 1–10 of 199

    • 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.