Summary & Overview
CPT 83861: Microfluidic Tear Osmolarity Analysis
CPT code 83861 designates microfluidic analysis of tear osmolarity, a laboratory diagnostic test used in the assessment of patients with symptoms of dry eye. Nationally, this code matters because tear osmolarity is a quantitative biomarker increasingly used to inform clinical evaluation of ocular surface disease and to support care decisions in ophthalmology and optometry settings. The test is typically performed in outpatient eye clinics, specialty eye care centers, or clinical laboratories and is billed when a lab analyst conducts the microfluidic assay.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for the test, typical sites of service, and payer coverage considerations. The publication highlights common billing modifiers and operational notes and identifies where input data is not available, such as associated taxonomies, specific ICD-10 pairings, or related codes. This summary equips revenue, compliance, and clinical teams with concise background and the topics to expect in the full publication, including benchmarks, payer policy variations, and clinical use cases for tear osmolarity testing.
Billing Code Overview
CPT code 83861 describes a microfluidic analysis of tear osmolarity performed by a laboratory analyst to assess tear film salt concentration, commonly used in the evaluation of dry eye symptoms. This test measures osmolarity in a small tear sample to help characterize tear film instability and ocular surface disease.
Service Type: Clinical laboratory diagnostic test (tear osmolarity analysis)
Typical Site of Service: Outpatient clinics, ophthalmology or optometry offices, specialty eye care centers, and clinical laboratories
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient presents to an ophthalmology clinic with complaints of chronic ocular irritation, burning, intermittent blurred vision, and foreign body sensation, worse at the end of the day. The clinician suspects dry eye disease and orders a tear osmolarity test using a microfluidic analyzer to quantify tear film osmolarity. In the clinic workflow, a trained technician or lab analyst collects a small tear sample or uses a point-of-care microfluidic device at the slit lamp. Results are reviewed by the ophthalmologist or optometrist during the visit to guide management decisions such as artificial tears, anti-inflammatory therapy, or further diagnostic testing. Typical site of service is an ophthalmology or optometry clinic or outpatient eye care center. The service type is diagnostic laboratory/point-of-care ocular diagnostic test performed by laboratory personnel or trained clinic staff under supervision.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the physician interpretation component separate from the technical/ device component |
TC | Technical component | When billing only the technical component (device, technician) without physician interpretation |