Summary & Overview

CPT 0437U: MindX One Blood Test — Anxiety Risk Score

CPT code 0437U is a Proprietary Laboratory Analyses (PLA) code for the MindX One™ Blood Test — Anxiety, a proprietary gene expression assay that evaluates 15 genes from a blood specimen and reports an algorithm-derived predictive risk score for anxiety disorders. As a PLA code, 0437U is specific to a single manufacturer and test, which affects coding, billing clarity, and payer recognition nationwide. This code matters nationally as proprietary molecular diagnostics continue to expand the array of precision behavioral health tools available to clinicians and payers.

Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines payer coverage patterns, billing benchmarks, and clinical context for use of the assay. Readers will find a concise explanation of what the code represents, the typical laboratory service model and site of service, and an overview of payer considerations. The report also summarizes available benchmarks and policy updates where present and highlights clinical considerations relevant to ordering clinicians and laboratory managers.

This national-focused summary does not provide state-specific guidance. Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes are noted elsewhere in the document.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare0437UCPTProprietary Laboratory Analysesgene expressionanxietymolecular diagnosticlaboratory testbehavioral health diagnostics

Billing Code Overview

CPT code 0437U is a Proprietary Laboratory Analyses (PLA) code assigned to the MindX One™ Blood Test — Anxiety, produced by MindX Sciences. The test uses a blood specimen to perform gene expression profiling of 15 genes and applies an algorithmic analysis to generate a predictive risk score for anxiety disorders. This code applies only to this specific manufacturer’s test.

Service type: Clinical laboratory molecular diagnostic test (proprietary gene expression assay)

Typical site of service: Clinical laboratory or reference laboratory; specimen collected in an outpatient clinic or collection site and processed at the performing laboratory.

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult presenting to a primary care, psychiatry, or behavioral health clinic with symptoms of generalized anxiety, panic attacks, social anxiety, or treatment-resistant anxiety despite psychotherapy or pharmacotherapy. The clinician documents persistent anxiety symptoms, functional impairment, or uncertainty regarding diagnosis or prognosis and orders the MindX One™ Blood Test — Anxiety to aid risk stratification. A phlebotomy-trained technician or laboratory draws a blood specimen during the office visit or at an affiliated outpatient laboratory. The specimen is sent to the proprietary laboratory performing the assay. The laboratory performs gene expression profiling of 15 genes and applies the manufacturer’s algorithm to generate a predictive risk score for anxiety disorders. The ordering clinician reviews the report within the electronic health record and integrates the result into the clinical assessment and management plan, which may include further diagnostic evaluation, changes to therapy, or referral to specialty mental health services. Typical sites of service include outpatient clinic offices, behavioral health centers, and outpatient phlebotomy or laboratory collection sites. The service type is laboratory-based Proprietary Laboratory Analyses (PLA) using a blood specimen.

Coding Specifications

Modifier	Description	When to Use
`00`	Default/No modifier	Use when no other modifier applies to the service billing.
`26`	Professional component	Use when billing only the professional component of a split service, if applicable for lab professional oversight separate from the technical component.
`TC`	Technical component	Use when billing only the technical component (laboratory processing and analysis) of the test.
`52`	Reduced services	Use when the test is partially performed or a reduced service is furnished.
`53`	Discontinued procedure	Use if specimen collection or testing is discontinued for clinical reasons.
`59`	Data not available in the input.	Data not available in the input.
`62`	Two surgeons	Generally not applicable to lab tests; include only if dual-surgeon policy identifiers are required by a payer for related services.
`78`	Unplanned return to the operating/procedure room	Generally not applicable to this lab test; used only if code billing aligns with an unexpected return for a related procedure.
`80`	Assistant surgeon	Not typically applicable to laboratory tests; included only for completeness where assistant billing affects bundled services.
`QK`	Medical direction by a physician, 2-4 ancillary staff	Use for anesthesia-related services only; not applicable to this PLA but listed among common modifiers.
`QX`	CRNA service with medical direction	As above, not applicable to this PLA.
`QY`	Medical direction of one CRNA by an anesthesiologist	As above, not applicable to this PLA.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist service	Use when the specimen collection or ordering is performed by an advanced practice clinician and payer requires this modifier.
`CO`	Services related to a workers' compensation case	Use when the test is ordered as part of a workers' compensation claim and the payer requires the `CO` modifier.

Taxonomy Code	Specialty	Notes
`2084P0800X`	Psychiatry	Psychiatrists commonly order anxiety risk testing when evaluating diagnostic uncertainty or treatment planning.
`208000000X`	Family Medicine	Primary care physicians frequently evaluate anxiety symptoms and may order laboratory-based risk assessments.
`207Q00000X`	Internal Medicine	Internists managing adult patients with anxiety disorders may order the test as part of outpatient evaluation.
`362RP0800X`	Clinical Laboratory Director	Laboratory medicine specialists oversee testing quality and result interpretation workflows.
`1835S0102X`	Clinical Geneticist (or Genetic Counselor)	May be involved for interpretation of gene expression-based reports in complex cases.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`F41.1`	Generalized anxiety disorder	Common indication for ordering an anxiety risk assessment to guide diagnosis or management.
`F40.10`	Social phobia, unspecified	Used when social anxiety is a prominent clinical concern and risk stratification may inform care.
`F41.0`	Panic disorder [episodic paroxysmal anxiety]	Relevant when panic symptoms prompt evaluation for anxiety disorder risk and treatment planning.
`F41.9`	Anxiety disorder, unspecified	Applied when anxiety symptoms are present but do not meet a more specific anxiety disorder code; supports use of a diagnostic adjunct test.
`Z13.31`	Encounter for screening for mental health and behavioral disorders	May be used when ordering screening or risk assessment tests in asymptomatic or screening contexts.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`81002`	Urinalysis, non-automated, without microscopy	May be performed at the same visit for baseline medical evaluation or medication monitoring.
`36415`	Collection of venous blood by venipuncture	Venipuncture is the specimen collection method required to obtain the blood sample for the PLA test.
`99000`	Handling and/or conveyance of specimen for transfer from the physician’s office to a laboratory	Use when an additional chargeable specimen handling/transportation service is billed, per payer policy.
`80307`	Drug screen, presumptive, any number of drug classes; performed by instrumented chemistry analyzers	May be ordered concurrently in behavioral health assessments when substance use is a differential.
`81299`	Molecular pathology procedure, other than listed; unlisted (use only if applicable for custom molecular tests when PLA codes are not applicable)	Historically used for molecular tests prior to PLA codes; not appropriate when a PLA code like `0437U` exists.